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Disk mirroring (RAID 1) concepts

191

Data Integrity, Availability, and Protection

Disk mirroring (RAID 1) concepts

Symmetrix Mirroring (RAID 1) provides the highest level of 
performance and availability for all mission-critical and 
business-critical applications. Mirroring maintains a duplicate copy 
of a logical volume on two physical disk drives. The Symmetrix 
system maintains these copies internally by writing all modified data 
to both devices. The mirroring operation is transparent to the host.

The mirroring feature designates from two to four logical volumes 
residing on different physical devices as a mirrored volume, one 
volume being mirror-1 and the other volumes being mirror-2, 
mirror-3c, and mirror-4. The host views the mirrored volumes as the 
same logical volume because each has the same unit address. 

Advantages of 
mirroring

Symmetrix Mirroring offers the following advantages:

◆

Improved performance over traditional mirrored (RAID 1) data 
protection by supporting 100-percent fast write and two 
simultaneous internal data transfer paths.

◆

Protection of mission-critical data from any single point of failure.

◆

Assurance that the second copy of data is identical to the first 
copy.

◆

Superior read performance since both mirrors are used for read 
operations.

◆

Continuous business operation in a situation where there is a 
device failure.

◆

Automatic resynchronization of the mirrored pair after repairing 
the defective volume.

Write operations 
with mirroring

Symmetrix systems handle a write operation to a mirrored logical 
volume as a normal write operation. The channel director presents 
channel end and device end (or a good-ending status) to the channel 
after data is written to, and verified in, global memory. The disk 
directors then destage the data to each drive of the mirrored pair 
asynchronously. As such, mirroring on Symmetrix systems exploits 
the 100-percent fast write capability, and the application does not see 
additional time associated with having to physically perform two 
disk write I/Os (one to each drive of the mirrored pair) as normally 
occurs with mirroring. 

Содержание Symmetrix DMX-3

Страница 1: ...EMC Corporation Corporate Headquarters Hopkinton MA 01748 9103 1 508 435 1000 www EMC com EMC Symmetrix DMX 3 Product Guide P N 300 002 197 REV A09...

Страница 2: ...H RESPECT TO THE INFORMATION IN THIS PUBLICATION AND SPECIFICALLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Use copying and distribution of any EMC software d...

Страница 3: ...ities and global memory requirements 31 Storage capacities 31 Factors affecting storage capacity 31 Global memory requirements 32 Performance features 33 Availability and integrity features 35 Service...

Страница 4: ...cards LCC 63 Power supply cooling module 63 Symmetrix DMX disk drive capacities 64 Symmetrix DMX 3 logical volume capacities 66 Configuration rules for vault devices 68 Symmetrix DMX disk drive emulat...

Страница 5: ...systems environment 106 Symmetrix I O operations 106 Read operations 108 Write operations 110 Write destaging operation 112 I O performance enhancements 113 Chapter 4 Performance and Optimization Ove...

Страница 6: ...ioning description 146 Benefits of Virtual Provisioning 147 Virtual Provisioning features 147 Multiport volume access for open systems environments 149 Software options overview 150 EMC ControlCenter...

Страница 7: ...ude redundancy code LRC 179 Byte level parity checking 179 Global memory access path protection 180 DMX 3 security features 181 Security overview 182 Symmetrix Service Credential Secured by RSA 182 Ac...

Страница 8: ...s 211 Sparing configuration rules and guidelines 211 Special DMX 3 sparing considerations 211 Sparing benefits 213 Permanent sparing 213 Dynamic sparing 216 SRDF family of products 221 Base SRDF famil...

Страница 9: ...perator messages 246 EREP reports 248 Error handling 249 Detecting the error 250 Sense byte information 251 Console error messages 251 Host sense byte data formats 253 Appendix A Symmetrix DMX 3 Speci...

Страница 10: ...290 Regulatory compliance 291 Choosing a UPS 292 System placement options 293 Overhead host cable routing 294 Overhead power cable routing 294 Floor load bearing requirements 295 Symmetrix DMX 3 conf...

Страница 11: ...mmetrix DMX 3 card cage configurations rear 58 12 Track format for 3390 DASD 73 13 Global memory director to channel and disk director matrix 84 14 Symmetrix DMX 3 system bay and storage bay to custom...

Страница 12: ...l mode 202 46 RAID 6 6 2 data parity layout 208 47 RAID 6 14 2 209 48 Permanent sparing process 215 49 Dynamic sparing process 217 50 Dynamic sparing with locally mirrored pairs 219 51 Dynamic support...

Страница 13: ...YAFLE cable description 275 66 EMC model number DMX3 PCBL3YAG cable description 275 67 System bay and storage bay wiring with flying leads WYE 276 68 Symmetrix DMX 3 system bay and storage bay power s...

Страница 14: ...EMC Symmetrix DMX 3 Product Guide 14 Figures...

Страница 15: ...es 66 14 Logical volumes supported for DMX 3 systems 67 15 IBM DASD emulation characteristics 72 16 Supported protocols and Symmetrix DMX 3 channel directors 76 17 Symmetrix DMX 3 channel director mod...

Страница 16: ...ations 267 46 Air volume generated 267 47 Sound power and sound pressure levels 267 48 DMX 3 power consumption and heat dissipation 269 49 Electrical specifications North American three phase four wir...

Страница 17: ...plus d un cordon d alimentation Afin de pr venir les chocs lectriques d branchez tous les cordons d alimentation avant de faire le d pannage Un circuit de terre continu est essentiel en vue du fonctio...

Страница 18: ...ove the system WARNING This product operates at high voltages To protect against physical harm power off the system whenever possible while servicing WARNING In case of fire or other emergency involvi...

Страница 19: ...ischarge and need to be handled accordingly CAUTION Before handling printed circuit boards or other parts containing LSI or VLSI components observe the following precautions Store all printed circuit...

Страница 20: ...20 EMC Symmetrix DMX 3 Product Guide Warnings and Cautions...

Страница 21: ...k If your Symmetrix DMX 3 does not function properly or does not function as described in this document please contact your EMC representative Audience This manual is part of the Symmetrix DMX series...

Страница 22: ...Normal Used in running nonprocedural text for Names of interface elements such as names of windows dialog boxes buttons fields and menus Names of resources attributes pools Boolean expressions buttons...

Страница 23: ...ervice request through Powerlink you must have a valid support agreement Please contact your EMC sales representative for details about obtaining a valid support agreement or to answer any questions a...

Страница 24: ...uct Guide Preface Your comments Your suggestions will help us continue to improve the accuracy organization and overall quality of the user publications Please send your opinion of this document to te...

Страница 25: ...rviceability features and hardware and software options Symmetrix DMX 3 26 Symmetrix platform and Enginuity operating environment 29 Storage capacities and global memory requirements 31 Performance fe...

Страница 26: ...drives providing a maximum raw capacity of approximately 1 PB Note For information on 2 400 drive support contact your EMC Sales Representative To support the massive scalability of DMX 3 configurati...

Страница 27: ...ontains the 24 slot card cage service processor power modules and battery backup unit BBU assemblies The storage bays contain disk drives and associated BBU modules In a highly scalable component and...

Страница 28: ...28 EMC Symmetrix DMX 3 Product Guide Introducing the Symmetrix DMX 3 Figure 2 Symmetrix DMX 3 five bay configuration Figure 3 Symmetrix DMX 3 two bay configuration...

Страница 29: ...lustrates the relationships among these software layers and Symmetrix hardware Figure 4 Enginuity and the storage platform relationships Enginuity operating environment Symmetrix Enginuity is the oper...

Страница 30: ...h Symmetrix based functionality and for a large suite of EMC storage application software Defines priority of each task including basic system maintenance I O processing application processing for exa...

Страница 31: ...e and system capacities Factors affecting storage capacity The following factors affect disk storage capacity Drive capacity size Type of data protection options used Internal Symmetrix File System SF...

Страница 32: ...ons other variables that affect the amount of global memory a Symmetrix DMX 3 requires include the following Number of global memory directors Variable back end disk director and front end channel dir...

Страница 33: ...on PermaCache option on page 121 2 Gb s Fibre Channel Drive Infrastructure Fibre Channel disk subsystem on page 62 Multiple scalable channel directors disk directors and global memory directors a ESCO...

Страница 34: ...try IBM CKD DASD disk emulation on page 71 Compatible Parallel Access Volumes COM PAVs Parallel Access Volumes on page 231 Compatible HyperPAV Compatible HyperPAV on page 231 Dynamic Parallel Access V...

Страница 35: ...el director redundancy with end to end automatic channel failover and load balancing Channel director redundancy on page 163 Internal Control Data Path redundancy Internal control data path redundancy...

Страница 36: ...nframe systems on page 196 Sparing option Dynamic sparing on page 216 Permanent sparing on page 213 SRDF Base SRDF family products on page 221 SRDF family options on page 222 Nondisruptive component r...

Страница 37: ...vide the low level system wide communications for running application software monitoring and system diagnostics from the service processor Symmetrix DMX systems feature an incrementally scalable desi...

Страница 38: ...remote replication software solutions on page 39 Information mobility on page 40 Note Product information on these software options are available on the EMC Powerlink website at http Powerlink EMC com...

Страница 39: ...ftware product providing discovery and viewing of your Symmetrix environment EzSM provides facilities to handle volumes data sets catalogs and detailed Symmetrix functionality information Note See EMC...

Страница 40: ...level for Microsoft Windows and UNIX servers EMC Open Replicator for Symmetrix Enables remote point in time copies to be used for high speed data mobility remote vaulting migrations and distribution b...

Страница 41: ...s a fan noise reduction option for the Symmetrix DMX 3 system bay and storage bay systems The Symmetrix DMX 3 Silencer is designed with leading edge sound reducing materials that attenuate high freque...

Страница 42: ...ensions and weight for the DMX 3 Silencer for the system bay and storage bay Table 47 on page 267 lists the sound power and sound pressure levels for the DMX 3 system bay and storage bays Table 4 DMX...

Страница 43: ...g such events The kits contain heavy brackets plus hardware used to attach the brackets to the frames of the system and storage bays The brackets are attached to the floor using bolts that engage the...

Страница 44: ...44 EMC Symmetrix DMX 3 Product Guide Introducing the Symmetrix DMX 3...

Страница 45: ...ncluding Major components 46 Symmetrix DMX 3 architecture 53 Symmetrix channel connectivity and host integration 59 Fibre Channel disk subsystem 62 Channel disk and global memory directors 75 Symmetri...

Страница 46: ...no user serviceable parts Neither the system bay nor the storage bays should not be moved or opened for any reason by untrained persons If the Symmetrix DMX 3 is in need of relocation or repair only...

Страница 47: ...000978 Power zone B left side Power zone A right side Disk directors Channel directors and Global memory directors in 24 Slot card cage Battery backup unit assemblies Battery backup unit modules Disk...

Страница 48: ...lems such as thermal excursion voltage drop etc It also has connectors for paths between the XCM and the BBU modules in the system bay and the storage bays for sending commands and receiving status Po...

Страница 49: ...RI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP P...

Страница 50: ...overview Component Description Drive enclosures The Symmetrix DMX 3 storage bay is configured with capacities of 120 or 240 disk drives Each drive enclosure includes the following components Redundant...

Страница 51: ...city raw a a Minimum raw capacity for a DMX 3 is based on 73 GB disk drives and maximum capacity is based on 500 GB disk drives 7 04 119 90 14 08 479 62 26 40 719 43 35 21 959 54 Maximum TB capacity p...

Страница 52: ...tem environments RAID 10 Data striped across four mirrored pairs of hypervolumes for mainframe environments RAID 5 3 1 or RAID 5 7 1 Data striped on four or eight hypervolumes with rotating parity RAI...

Страница 53: ...face adapters global memory directors and back end disk directors and their interface adapters The matrix midplane provides configuration flexibility through the slot configuration Each director slot...

Страница 54: ...rix FC disk devices Direct Matrix Direct Matrix Cntl FC BE or FE Symmetrix FC disk d e vices Direct Matrix Direct Matrix Cntl FC BE or FE Symmetrix FC disk d e vices Direct Matrix Direct Matrix Cntl F...

Страница 55: ...sage matrix The message fabric is made up of several fabric elements or FE connected together so that all end nodes are connected to a unique port on the outer edge of the message fabric The end nodes...

Страница 56: ...ane contains the channel directors disk directors and global memory directors The rear card cage midplane contains the adapters and the Communications and Environmental Control Module XCM pair Message...

Страница 57: ...slots are reserved for channel directors and disk directors eight to the left and eight to the right of memory Figure 10 on page 57 shows the card cage layout for the global memory directors the Fron...

Страница 58: ...3 card cage configurations rear Adapter pairs SYM 000078 Adp 16 Type BE Adp 15 Type BE Adp 14 Type FE Adp 13 Type FE Adp 12 Type BE or FE Adp 11 Type BE or FE Adp 6 Type BE or FE Adp 5 Type BE or FE A...

Страница 59: ...ymmetrix system For more information on the ESP option contact your local EMC Sales Representative Open systems connectivity The Symmetrix DMX 3 connects to Fibre Channel and iSCSI open system host in...

Страница 60: ...s and iSeries hosts that have Fibre Channel connectivity Note Consult your local EMC Sales Representative for the most current list of supported hosts models operating systems and EMC open systems hos...

Страница 61: ...g system can be supported including Symmetrix DMX systems also support the following mainframe operating systems Table 10 IBM controller DASD compatibility IBM controller IBM DASD 3990 6 2105 2107 338...

Страница 62: ...face cards Two power supply cooling modules The drive enclosure supports 2 Gb s back end fibre interface FC AL The dual loop configuration provides redundancy port bypass capability and disk access up...

Страница 63: ...in the storage bay Power supply cooling module Two power supply cooling modules provide all necessary power and cooling to the 15 disk drives in the disk enclosure in an N 1 configuration Table 11 Sym...

Страница 64: ...0 and SRDF Table 12 on page 65 shows the available Symmetrix cylinders and storage capacities for 73 GB 146 GB 300 GB 450 GB and 500 GB disk drives based on the open systems mainframe and iSeries emul...

Страница 65: ...299 76 GB10 449 643 GB10 499 6 GB10 Formatted capacity open systems in GB2 68 30 GB2 136 62 GB2 279 17 GB2 418 763 GB2 465 29 GB2 Cylinders open systems 74 611 149 227 304 932 457 764 508 626 Formatte...

Страница 66: ...yed Note Logical volumes supported for DMX 3 systems on page 67 shows the maximum logical volumes available for the Symmetrix DMX 3 with the number of disk drives stated and a homogeneous protection s...

Страница 67: ...0 1 920 8 RAID 6 14 2 15 360 1 920 8 RAID 10 16 000 1 440 6 SRDF 64 000 1 440 6 RAID 1 64 000 1 440 6 RAID 5 3 1 49 152 1 440 6 RAID 5 7 1 24 576 1 440 6 RAID 6 6 2 23 040 1 440 6 RAID 6 14 2 11 520 1...

Страница 68: ...ault space However they can reside on the same physical disk drive as the vault devices but not within the vault devices The distribution of the vault devices across the disk directors the back end in...

Страница 69: ...e following paragraphs describe the FBA disk format and logical volume structure FBA data and command format Fixed Block Architecture FBA disk drives store data in fixed sized blocks typically 512 byt...

Страница 70: ...the partition table are stored in the label in sector 0 of the disk The label is written to the disk using the format utility which makes a device usable to the OS When a Solaris device is opened for...

Страница 71: ...th the introduction of Flexible Device Geometry To alleviate any potential for corruption two features have been added to Symmetrix Enginuity A bin file setting has been included that allows the DMX 3...

Страница 72: ...volumes depending on the data protection used Note Mainframe systems hypervolumes on page 132 contains information on configuring mainframe logical volumes IBM PCM data and command formats All Symmet...

Страница 73: ...home address on each track that defines the physical location of the track by specifying the track address cylinder and head location and the condition of the track flag byte The flag byte indicates w...

Страница 74: ...ata records additional Address Markers Count Areas and gaps reduce the number of bytes available for data The track capacity is the number of bytes left for data records after subtracting the bytes ne...

Страница 75: ...onnection combinations Fibre Channel FICON iSCSI GigE Gigabit Ethernet remote directors used for SRDF GigE IPv4 v6 IPsec capable directors Note The Symmetrix DMX 3 supports mixed ESCON FICON Fibre Cha...

Страница 76: ...n to DMX technology each director includes support for a separate message matrix for the transfer of control information Note DMX 3 point to point message matrix on page 55 and DMX 3 communications an...

Страница 77: ...s 8 DMX3 71000B 8 port Fibre Channel Director 7 MM 1 SM port 7 1 DMX3 62000B 8 port Fibre Channel Director 6 MM 2 SM ports 6 2 DMX3 00004B 4 port FICON Channel Director 4 SM ports 4 DMX3 00040B 4 port...

Страница 78: ...end The Symmetrix DMX 3 Fibre Channel adapters provide the connectivity between the host channels and the Fibre Channel front end director through optical transceiver connections Note Symmetrix Fibre...

Страница 79: ...CON channel configurations supported in the DMX 3 SDMS support The Symmetrix ESCON director supports the SDMS Symmetrix Data Migration Service application for migrating data over ESCON channels from o...

Страница 80: ...oint to point connections to IBM 9672 G5 G6 z 900 and z 990 systems running z OS z VM VM ESA and VSE ESA operating systems FICON employs ESCON protocols that have been mapped to the FC 4 upper level p...

Страница 81: ...and function layers Is fully compatible with the SRDF protocols and other Symmetrix DMX directors drives software and protection schemes Symmetrix DMX GigE remote channels for SRDF transfer data at sp...

Страница 82: ...el directors The Symmetrix DMX 3 MPCD through mezzanine card technology supports iSCSI channel connectivity by way of Gigabit Ethernet GigE hardware for the Symmetrix DMX systems The iSCSI channel dir...

Страница 83: ...s The Symmetrix DMX 3 global memory director technology is one of the most crucial components of a Symmetrix system The DMX 3 uses global memory directors that use industry standard Double Data Rate S...

Страница 84: ...connect to one of the 16 memory ports on each of the eight global memory directors Figure 13 on page 84 These 128 individual point to point connections facilitate up to 128 concurrent cache operations...

Страница 85: ...lobal memory directors are available in 8 GB 16 GB 32 GB and 64 GB sizes When configuring global memory for the Symmetrix DMX systems follow these guidelines Very large eight disk director configurati...

Страница 86: ...r supplies that are split into two power zones Power Zone A and Power Zone B consisting of up to four power supplies each The system bay also contains up to eight Battery Backup Unit BBU modules provi...

Страница 87: ...the storage bay PDUs The storage bay PDPs contain the manual On Off power switches which are accessible through the rear door The DMX 3 storage bay PDPs are available in three phase Delta and three ph...

Страница 88: ...t cable A Zone B PDP left Zone A PDP right 15 ft Extension cord 15 ft Extension cord Customer s power distribution unit number B Customer s power distribution unit number A Zone B AC input cable B Cab...

Страница 89: ...al connections to the service processor provide dial home capabilities for remote monitoring and diagnostics The software driven failover mechanism exists such that the Ethernet fabric remains intact...

Страница 90: ...al voltages ensuring optimum power delivery Temperature of directors and memory are also continuously monitored The AC power main is checked for AC failures Transfer to auxiliary DC failures Current s...

Страница 91: ...e drops across major connectors Ailing components can be detected and replaced before a failure occurs Figure 16 XCM environmental control functionality Directors 16 Memory boards 8 Service processor...

Страница 92: ...for four concurrent operations through four physical interfaces for communicating with the FICON channels in host systems Note FICON channel director on page 80 contains more information on the FICON...

Страница 93: ...tances a Cable type Cable description Maximum supported distance Single mode SM Long wave Laser 1 310 nm 9 micron 1 Gb s 10 km 6 2 miles for each link Up to 20 km 12 43 miles for each link with IBM RP...

Страница 94: ...ese cascaded switches communicate over long distances using a small number of high speed lines called ISLs InterSwitch Links Up to a maximum of two switches may be connected together within a path bet...

Страница 95: ...ESCON implementation supports data transfer rates up to 17 MB s There are two types of fiber optic cables multimode and single mode Multimode cables support a maximum link of 1 86 miles 3 km Single mo...

Страница 96: ...gle mode fiber optic cables ESCON channel ESCON channel ESCON channel ESCON channel ESCON channel Processor or LPAR Processor or LPAR Processor or LPAR Processor or LPAR Processor or LPAR 3 km Max 3 k...

Страница 97: ...attachment However one of the directors must be configured with a static connection because the ESCON architecture recognizes only one port address The dynamic switch configuration is defined in the...

Страница 98: ...the host channels and the Fibre Channel directors FC 0 layer of the Fibre Channel standard The eight port Fibre Channel director provides the capability for eight concurrent operations through its ei...

Страница 99: ...per cable segment 50 micron 2 Gb s 300 m 984 ft per cable segment 50 micron 4 Gb s 150 m 492 ft per cable segment 62 5 micron 1 Gb s 300 m 984 ft per cable segment 62 5 micron 2 Gb s 150 m 492 ft per...

Страница 100: ...100 EMC Symmetrix DMX 3 Product Guide Symmetrix DMX 3 Hardware...

Страница 101: ...ody Tag This chapter describes input and output operations between the Symmetrix DMX 3 system and a host system Symmetrix DMX 3 operation 102 Elements of a Symmetrix I O operation 105 I O performance...

Страница 102: ...e The performance improvement achieved depends on both of the following principles Locality of reference If a given piece of information is used there is a high probability that a nearby piece of info...

Страница 103: ...lobal memory Figure 20 on page 103 to determine if the request can be satisfied within global memory The directory contains information on each memory page and blocks within each page Tag based Cachin...

Страница 104: ...per each logical volume an array of statistics and parameters based on the latest sequential patterns observed on the logical volume Prefetch dynamically adjusts based on workload demand across all re...

Страница 105: ...page 112 I O response time Mainframe environment In the mainframe environment I O response time can be divided into a queuing time a pend time a connect time and a disconnect time as shown in Figure...

Страница 106: ...vices Note In case of a memory hit in an I O request the Disconnect time requirement is eliminated The Data connect time is the length of time the channel is transferring data Symmetrix I O operations...

Страница 107: ...ead miss Channel Channel Channel director Directory Global memory Channel director Directory Global memory Disk director Disk Disk director Disk Fast write Delayed fast write 1 Search hit global memor...

Страница 108: ...ation Figure 24 on page 108 the requested data resides in global memory The channel director transfers the requested data through the channel interface to the host and updates the global memory direct...

Страница 109: ...the requested data is in the process of being prefetched sequential read ahead the miss is considered to be a short miss If the requested data is not in the process of being read into global memory th...

Страница 110: ...a host write command the channel director places the incoming blocks directly into global memory For fast write operations Figure 27 on page 110 the channel director stores the data in global memory...

Страница 111: ...hreshold If this situation occurs the Symmetrix system disconnects the channel directors from the channels The disk directors then destage the Least Recently Used LRU data to disk When sufficient glob...

Страница 112: ...ntegrity Any pending writes are assured of arrival to the intended disk even in the event of power failure Figure 30 on page 112 illustrates this destaging operation Figure 30 Destaging operation For...

Страница 113: ...15 drives to 45 drives per loop Fibre Channel disk subsystem on page 62 and Fibre Channel disk directors back end on page 83 contains more information on director and disk combinations High speed glo...

Страница 114: ...114 EMC Symmetrix DMX 3 Product Guide Symmetrix DMX 3 Input Output Operations...

Страница 115: ...rmance features 117 Symmetrix file system performance features 122 Multiple channel directors 124 Open systems hypervolumes 127 Mainframe systems hypervolumes 132 Tiered Storage Optimization 136 Optim...

Страница 116: ...application behavior is greatly influenced by the performance optimization algorithms Symmetrix Enginuity contains extensive algorithmic intelligence that is designed to deliver fast application respo...

Страница 117: ...nsistently high levels of system performance improve responsiveness and consistency of responsiveness and manage peak I O requests through a series of techniques that essentially eliminate contention...

Страница 118: ...tors supports 16 separately addressable and accessible global memory regions Buffering Global memory ASICs buffer incoming requests from front end channel directors and as soon as possible free up the...

Страница 119: ...bout the last time the system most recently accessed this slot whether the slot is write pending and other attributes Each memory slot is represented by one tag Tags are clustered into groups called e...

Страница 120: ...f Symmetrix back end components Minimize the seek time spent on the physical drives Note DMSP also works with the Symmetrix file system as described in Enhancement of dynamic mirror service policy on...

Страница 121: ...he system or reducing the number of Symmetrix RAID 6 groups defined Global memory requirements Your system must be configured with more than the minimum base amount of global memory for it to use part...

Страница 122: ...nce algorithms State of the art information management algorithms implemented within Enginuity need to store and use statistical data gathered over time SFS provides a place to store this statistical...

Страница 123: ...ow and when a Symmetrix device is being used Enginuity also expands capabilities for host applications built on SymmAPI Earlier host applications were allowed to make entries to a Symmetrix write only...

Страница 124: ...oftware is installed on the Symmetrix system The DMX 3 supports these channel directors ESCON directors mainframe hosts Fibre Channel directors open systems hosts Multiprotocol channel directors with...

Страница 125: ...me Symmetrix systems support FICON fiber cable connections up to 7 45 miles 12 km with single mode connections Note Table 21 on page 93 provides more detailed supported cable distance information Tabl...

Страница 126: ...SI GigE SRDF and Fibre Channels The Symmetrix DMX 3 supports mainframe systems host connectivity through ESCON and FICON channels Note Symmetrix DMX 3 only supports Fibre Channel connectivity for iSer...

Страница 127: ...GB file systems per single logical disk The Symmetrix DMX 3 allows up to 160 logical volumes on each Symmetrix DMX 3 open systems physical disk drive and up to 64 000 logical volumes address range 0x0...

Страница 128: ...mapping 8 1 Metavolumes Several operating systems such as Windows NT and Windows 2000 some applications software and some open systems environments require larger volumes than are provided by standard...

Страница 129: ...ach member of the metadevice must be counted toward the maximum number of host supported logical volumes For information on Fibre Channel host attachments refer to the EMC Support Matrix located on th...

Страница 130: ...n data striping equal size stripes of data from each participating drive are written alternately to each member of the set Figure 34 Striped data Configuring metavolumes Although members of a striped...

Страница 131: ...s Convert an unused volume to a concatenated or striped metavolume Convert a populated volume to a concatenated or striped metavolume Striping data across the multiple drives is designed to benefit ra...

Страница 132: ...e data protection option used Extended cylinder addressing Establishes a small logical volume at the end of physical disk drive for data requiring high performance on a small volume Split volume capab...

Страница 133: ...one cylinder in size The maximum number of cylinders for this volume depends on the capacity of the disk drive and the emulation mode selected This flexibility in logical volume configuration increase...

Страница 134: ...port cylinders Desired number of logical volumes for the Symmetrix disk device Table 25 on page 134 lists the disk drive capacities for 3380 and 3390 emulations Table 26 on page 135 outlines the cylin...

Страница 135: ...ation type Number of emulated cylinders Alternate diagnostic devicesupportcylinders ADDS Symmetrix Internal Device Support Cylinders Total support cylinders 3380D 885 3 2 5 3380E 1 770 4 2 6 3380K 2 6...

Страница 136: ...ement Priority queues Globally set and execute prioritization of queue resources by cache director and RDF I O queue There are 16 priority service levels 1 fastest to 16 lowest Service levels are set...

Страница 137: ...hat it will allow donation of underutilized cache slots to other partitions after a user specified donation time The donation time equates to a measure of cache use efficiency and inefficiently used c...

Страница 138: ...t end adapters will introduce WP fairness delays to throttle host write activity If write activity continues and the write pending limit is reached priority destage operations take place on the Symmet...

Страница 139: ...acity required for each host connected to the Symmetrix system Determine the number of channels available from each host Analyze the nature of the applications executed on the host connected to the Sy...

Страница 140: ...ecified recipient drives by a sophisticated layout algorithm Final placement of the volumes is not known in advance After completion of the migration the original volumes are deleted from their origin...

Страница 141: ...guration management functions are routinely scheduled the Virtual LUN process should be limited by the maximum simultaneous volumes and maximum number of volumes to ensure completion within a timefram...

Страница 142: ...step process to prepare a migration The entry dialog is available under the Optimizer Swap Move Manual Move drop down sequence Figure 35 on page 142 shows step 1 of the SMC migration dialog selecting...

Страница 143: ...and Optimization Figure 36 on page 143 shows step 2 of the SMC migration dialog selecting the target disks It is important to note that disks containing the source devices are excluded from the migra...

Страница 144: ...LUN process can be scheduled in this SMC window or it can start according to policies defined in the Optimizer program Other Optimizer parameters such as maximum simultaneous volumes maximum number of...

Страница 145: ...association between the host LUN address and the address given to the device on the FA port The only requirement is that the device be mapped to the FA port This feature allows any device to be confi...

Страница 146: ...ed by the host systems The actual physical storage is not perceived by the host This allows alterations in the physical storage to occur without causing changes which affect the hosts The result is no...

Страница 147: ...ith cache partitions Consumption monitoring Users are able to monitor the amount of space that is consumed by thin devices and thin pools over time This includes for example a full view of thin pools...

Страница 148: ...supported with thin devices TF Snap of thin device TF Clone SRDF S SRDF A SRDF Data Mobility ORS pull hot and cold Restrictions include the following All thin device source volumes are replicated as t...

Страница 149: ...may be configured to be visible on two channels for host channel failover such as EMC PowerPath or HP UX PV links A volume can be accessed by up to 32 separate paths using EMC PowerPath A volume can b...

Страница 150: ...on the Storage Resource Management SRM solutions you want to implement This EMC ControlCenter section contains many references to supporting publications which can be accessed from any of the followin...

Страница 151: ...various tasks and to the various views of your SAN and the objects in it These common services allow you to discover and monitor objects in your SAN For example you can map the relationship of storage...

Страница 152: ...you to quickly recognize isolate and respond to storage issues from a single console This solution is achieved using the following ControlCenter applications SAN ManagerTM SAN AdvisorTM Automated Reso...

Страница 153: ...r physical locations swapped to enhance Symmetrix performance Swapping logical devices and their data using internal Dynamic Reallocation Volumes DRVs to hold customer data while reconfiguring the sys...

Страница 154: ...data for application development testing without scheduling downtime The TimeFinder family includes the following products TimeFinder family base products TimeFinder Clone Highly functional high perf...

Страница 155: ...and processing client commands Symmetrix Management Console Symmetrix Management Console SMC is an intuitive browser based graphical user interface for managing Symmetrix systems It can be hosted on a...

Страница 156: ...oring for tiered storage optimization software including Symmetrix Optimizer Virtual LUN technology Symmetrix Priority Controls and Dynamic Cache Partitioning SMC security features include user authen...

Страница 157: ...lity and availability features 162 Maintaining data integrity 175 DMX 3 security features 181 Data protection guidelines 189 Disk mirroring RAID 1 concepts 191 Symmetrix RAID 1 0 for open systems 195...

Страница 158: ...ackup Nondisruptive maintenance and microcode upgrades and loads These basic Symmetrix features provide protection against loss of system and data availability due to a power loss or failed component...

Страница 159: ...orking with your local EMC Sales Representative you can choose from the following Symmetrix data protection options to match your critical data requirements Mirroring RAID 1 on page 159 RAID 1 0 on pa...

Страница 160: ...AID 5 offers an extremely attractive alternative for information storage where price is more important than performance For Symmetrix DMX RAID 5 is available in one of two configurations per array RAI...

Страница 161: ...ve available in a good location the dynamic sparing process is followed After the permanent sparing process completes all system features are available and the Symmetrix returns to normal operation wi...

Страница 162: ...ruptive replacement of a failing global memory director When a hard error is detected or temporary errors reach a predetermined threshold the Symmetrix service processor calls home to request an immed...

Страница 163: ...potential for the application to go down EMC PowerPath provides this functionality and supports end to end host to switch and switch to storage channel failover functionality PowerPath provides automa...

Страница 164: ...elligent at the hardware level and load balance traffic between each domain In the event that a fault occurs within one of the domains the traffic is automatically routed by the hardware to the availa...

Страница 165: ...two ports are each connected to a different link control card LCC which in turn is connected through separate cables to two different disk directors These two pathways are completely independent of on...

Страница 166: ...wered on the drive was reset or the drive is malfunctioning In addition to the bypass circuits themselves the card contains real time monitors embedded within the loop that can determine if bad data i...

Страница 167: ...hannel frames it is marked with a sequence number that identifies the order of the frame within the exchange and in addition a cyclic redundancy checksum is computed over the data and appended to the...

Страница 168: ...ve failure This feature works by having each of the four processors on the paired disk directors shadow each other s functions For example this feature gives each processor the capability of servicing...

Страница 169: ...ion in processing The Symmetrix DMX system power subsystem has two power zones for redundancy and drive expansion The DMX system connects to two dedicated or isolated AC power lines If AC power fails...

Страница 170: ...ack to global memory to restore the system When the Symmetrix system is powered on the startup program does the following Initializes the hardware and the environmental system Restores the global memo...

Страница 171: ...BBU modules ensure data integrity during power outages The BBU modules provides the means for vaulting fast write data that might be in global memory if AC power is lost on both lines to the unit In...

Страница 172: ...ure on open systems channels When a power failure occurs power switches immediately to the BBU modules and the Symmetrix system continues to operate normally When the battery timer window elapses the...

Страница 173: ...ting system Taking unaffected channel paths offline Taking devices offline other than the affected device Nondisruptive Enginuity upgrades Interim updates of the Enginuity Operating Environment can be...

Страница 174: ...ardless of the type of data protection with the exception of spare drives This feature uses the same mechanisms as other online configuration changes to ensure no impacts Deleting and then adding devi...

Страница 175: ...179 Redundant global memory on page 179 Longitude redundancy code LRC on page 179 Byte level parity checking on page 179 Global memory access path protection on page 180 Remote support Remote support...

Страница 176: ...o might be known to the customer must still be properly associated with the specific customer s account An essential part of the design of the dial in support program is that the call to the customer...

Страница 177: ...the disk director reads all data on that track to Symmetrix global memory The disk director writes several worst case patterns to that track searching for media errors When the test completes the dis...

Страница 178: ...ice processor generates a Call Home for immediate attention Constant memory verification to detect and correct single bit and nonconsecutive double bit errors dramatically reduces the potential for mu...

Страница 179: ...nibble stored on that faulty chip However the global memory director enables regeneration of data from the faulty chip This leads to chip level redundancy making every chip on the global memory direc...

Страница 180: ...Before Symmetrix global memory can accept data from a host connection it must ensure that the area to which the data is to be written is without error The Symmetrix system assures the highest level of...

Страница 181: ...he Symmetrix including host initiated actions physical component changes actions on the service processor and attempts blocked by security controls such as Symmetrix Access Control The Audit Log is se...

Страница 182: ...s from EMC and selected partners including LUN masking Symmetrix access control and secure service credentials Securing infrastructure By providing information infrastructure from EMC including Secure...

Страница 183: ...Many product applications such as EMC ControlCenter TimeFinder SRDF Optimizer and various ISV products can issue management commands to any visible device in a Symmetrix system Windows hosts can manip...

Страница 184: ...r the entire Symmetrix array rather than for individual logical devices or classes of devices Roles are predefined in Solutions Enabler and cannot be modified For each Symmetrix array a given user can...

Страница 185: ...hey need to retain history beyond the 40 MB capacity Note Access to the Audit Log can be restricted in an open systems environment by utilizing Symmetrix Access Control or the new user authentication...

Страница 186: ...a to the drive all the way to multi pass erasure using complex algorithms as used in DoD 5220 22 M The intent of secure disk erase is to remove all recoverable user data from a given physical drive or...

Страница 187: ...rasure guidelines The following guidelines must be adhered to during the Data Erasure process Data Erasure requires permanent sparing Disk Erasure is invoked only upon successful completion of permane...

Страница 188: ...ty Allows customers to effectively manage Symmetrix communication and encryption with one interface Symmetrix Management Console SMC What is IPsec IPsec Internet Protocol Security is a framework for s...

Страница 189: ...ives Disk mirroring RAID 1 concepts on page 191 contains more information Symmetrix RAID 1 0 Provides a combination of RAID 1 and RAID 0 for open systems environments Data is striped across mirrored p...

Страница 190: ...ated information Dynamic sparing Increases data availability by copying the data on a failing volume to a spare volume until the original device is replaced Dynamic sparing is a required data protecti...

Страница 191: ...ID 1 data protection by supporting 100 percent fast write and two simultaneous internal data transfer paths Protection of mission critical data from any single point of failure Assurance that the seco...

Страница 192: ...d movement Dynamic Mirror Service Policy DMSP Utilizes both Interleave and Split for maximum throughput and minimal head movement DMSP adjusts each logical volume dynamically based on access patterns...

Страница 193: ...olumes BCV A Business Continuance Volume BCV is a standard virtual device logical volume used for dynamic mirroring It has additional attributes that allow it to independently support host application...

Страница 194: ...reduce physical storage requirements they do consume Symmetrix device numbers and host addresses Virtual devices VDEV can be associated with standard or BCV devices TimeFinder Snap control operations...

Страница 195: ...e size for this is two cylinders For some applications such as Microsoft Exchange best practices dictate that RAID 1 0 should be used over basic RAID 1 to enhance I O capability Microsoft Exchange s w...

Страница 196: ...gical devices can be chosen to define a RAID 10 group provided they are the same type for example IBM 3390 and have the same mirror configuration Striping occurs across this group of four devices with...

Страница 197: ...C has also observed 20 percent to 30 percent improvement in back end disk performance when DMSP is used compared with a situation in which each of the mirrored pair serves 50 percent of the read I Os...

Страница 198: ...mization on page 204 RAID 5 configuration rules on page 205 RAID 5 attributes A RAID 5 device has the following attributes RAID 5 track size is 64 KB Data blocks are striped or interleaved horizontall...

Страница 199: ...ng modes of operation Normal mode on page 199 Regeneration on page 200 Fast Copy Back on page 200 Normal mode When a RAID 5 device operates with all hypervolumes functioning it is operating in normal...

Страница 200: ...read modify write sequences executed concurrently Table 29 and Figure 44 on page 201 The Symmetrix DMX implementation of RAID 5 distributes the work of computing parity between the disk director and t...

Страница 201: ...ations in a Symmetrix RAID 5 Figure 45 on page 202 normal mode are processed through Symmetrix global memory as in normal Symmetrix system processing Write operation involves two instances of the read...

Страница 202: ...sparing on page 203 Data recovery with RAID 5 Symmetrix RAID 5 provides continuous availability for all data if any single physical disk in the RAID 5 device fails or becomes unavailable If a media er...

Страница 203: ...surviving members of the RAID 5 device After a spare is activated it behaves as if it is a full fledged member of the RAID 5 device Note Dynamic sparing with RAID 5 volumes on page 219 contains inform...

Страница 204: ...over extended periods of time typically a week Symm Optimizer provides a comprehensive analysis of the statistical data collected to identify over and under utilized system resources For example Symm...

Страница 205: ...to RAID 5 Only one member of a RAID 5 group is permitted per drive loop This configuration requires a minimum of eight drive enclosures for RAID 5 7 1 and four drive enclosures for RAID 5 3 1 RAID 5 3...

Страница 206: ...ge 207 RAID 6 6 2 on page 208 RAID 6 14 2 on page 208 Rebuilding data and parity members on page 209 RAID 6 configuration guidelines on page 210 Comparing RAID 5 and RAID 6 on page 210 RAID 6 attribut...

Страница 207: ...ta disks Diagonal Parity DP is made up of segments each DP segment is calculated on a selected group of data segments Each DP segment skips a different data drive in its calculation which is key to th...

Страница 208: ...13 14 15 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 D8 P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 D7 H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 16 1...

Страница 209: ...P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 D15 H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 16 16 16 16 16 16 16 16 16 16 16 16 16 0 1 2 3 4 5 6 0 1 2 3 4 5 6 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6...

Страница 210: ...evices BCVs can be RAID 6 devices SymmOptimizer Swap supports RAID 6 devices SRDF devices can be RAID 6 devices eSNAP source and destination devices can be RAID 6 devices A log device can be a RAID 6...

Страница 211: ...gure spare drives proportional to the amount of each type of drive configured in the Symmetrix Calculate the number and types of spares for DMX 3 systems as follows Two spare drives for each type of d...

Страница 212: ...0 GB 10K type must be added to reach a total of 9 This results in the following 2 73 GB 15K drives 2 146 GB 15K drives 5 300 GB 10K drives 9 total spare drives Note These calculations are for the mini...

Страница 213: ...loss of data Automatically activates the spare volume without interruption prior to loss of access to a potentially failing volume Ensures that the spare copy is identical to the original copy Increas...

Страница 214: ...cision based on error statistics maintained by its directors the intelligent disk microprocessor self testing information and its active error checking system 2 If the Symmetrix sparing algorithms det...

Страница 215: ...ntinue the Symmetrix system processes host I O requests at the highest priority to minimize any effects on performance 5 When the permanent sparing process is complete The drive used in the permanent...

Страница 216: ...e disk capacity This time can be significantly reduced by implementing permanent sparing Note EMC Certified Data Erasure for Symmetrix Disks on page 186 contains information on how this feature works...

Страница 217: ...ng drive The process also chooses an available spare drive of equal or larger capacity There is no restriction preventing a 7 2K 10K 15K spare from being invoked against any other speed failing drive...

Страница 218: ...minimize the effect on performance When the copy operation completes the Symmetrix system notifies the EMC Customer Support Center of the event The spare and the original device work as a mirrored pai...

Страница 219: ...with the mirror group Then the dynamic spare can be returned to the spare pool Figure 50 Dynamic sparing with locally mirrored pairs Dynamic sparing with RAID 5 volumes RAID 5 is architected around b...

Страница 220: ...he spare has a mirror number of its own that never changes Note Dynamic sparing cannot be used with RAID 6 volumes Dynamic sparing with remotely mirrored pairs SRDF When the dynamic sparing option is...

Страница 221: ...er restart testing Recovery from planned outages Remote backup Data center migration Data replication and mobility Note The EMC Symmetrix Remote Data Facility SRDF Product Guide contains specific info...

Страница 222: ...in operational state when encountering network resource shortfalls that would have previously suspended SRDF A operations With SRDF A Reserve Capacity functions enabled additional resource allocation...

Страница 223: ...F A during workload and network resource imbalances Note For simplicity this document uses the term SRDF to represent all EMC SRDF related products including SRDF A SRDF AR multi hop and single hop SR...

Страница 224: ...224 EMC Symmetrix DMX 3 Product Guide Data Integrity Availability and Protection...

Страница 225: ...ed in this chapter is only applicable to Symmetrix drives connected to mainframe hosts The following information is described Introduction 226 Supported mainframe features 227 Error reporting and reco...

Страница 226: ...provides an overview of the Symmetrix mainframe storage solutions supported by the Enginuity operating environment Also included are descriptions of the types of errors possible when the Symmetrix sy...

Страница 227: ...4 Supported FICON devices and logical paths on page 235 IBM MetroMirror PPRC on page 235 XRC support on page 236 Configuring CKD volumes on page 237 Deleting and then adding devices online on page 238...

Страница 228: ...reconnect to the host on any available channel path between the device and the host system if the original channel is busy with other operations Without DPR the SCU waits for the original channel path...

Страница 229: ...les improved host performance with the elimination of the copy on first write penalty associated with the use of Compatible Native Flash for Mainframe CNFM The elimination of the COFW penalty results...

Страница 230: ...DMX systems support multiple z OS environments by providing maximum connectivity through the use of its 3990 6 2105 or 2107 emulation modes and the Hypervolume Extension feature The Symmetrix systems...

Страница 231: ...from EMC The Symmetrix DMX systems must be defined to the host as a 2105 or 2107 control unit to support Parallel Access Volumes Compatible HyperPAV in the following section contains additional inform...

Страница 232: ...mproving the opportunity for parallel I O operations This further reduces and can even eliminate IOSQ time and enables EMC s PAV support for larger mainframe logical devices COMPAV MA is a licensed pr...

Страница 233: ...devices each one fourth the size of the original IBM device appear as one IBM device to the host accessible by way of one channel address Any four devices can be chosen to define a group provided they...

Страница 234: ...r up to 512 logical paths per port when both the A and B ports are configured Figure 52 on page 234 shows some sample configurations Figure 52 Supported ESCON logical paths per port Note ESCON channel...

Страница 235: ...6 Enginuity supports PPRC version 1 architecture level 2 CGROUP FREEZE RUN functionality Enginuity level 5771 adds support for PPRC version 1 architectural levels 3 and 4 Hyper Swap support including...

Страница 236: ...chronous solution write operations do not suffer from performance degradation while transferring the data across the link XRC provides update sequence integrity through its mechanism of consistency gr...

Страница 237: ...page 237 Note Only Enginuity level 5772 supports XRC functionality Contact your EMC Sales Representative for specific details regarding your Symmetrix system s support for XRC Figure 55 XRC overview C...

Страница 238: ...s Intermix configurations In addition to the standard direct connect configuration Symmetrix DMX FICON models support the use of Cascading and Open Systems Intermix configurations Cascading can be use...

Страница 239: ...microcode levels are also required FICON Open Systems Intermix configurations Open Systems Intermix allows separate FICON zones to be defined within new or existing open systems switches These switch...

Страница 240: ...ated to the processor and is always returned to the requesting program Overrun The Symmetrix system cannot receive data at the rate it is transmitted from the host system This error indicates a timing...

Страница 241: ...ng and correction ECC bytes These bytes often provide sufficient information for the Symmetrix system to reconstruct the data should an error occur When the Symmetrix system reconstructs the data usin...

Страница 242: ...r equipment check is detected the host system retries the operation If the operation is successful on the retry the error is recorded as recoverable If the retry is unsuccessful the error is recorded...

Страница 243: ...tion The sense data identifies the condition that caused the interruption and indicates the type of error and its origin The format of the sense data may be found in the appropriate IBM reference manu...

Страница 244: ...ror device not ready for periodic test 0472 Alarm signal set Acute alert A major I O subsystem resource is disabled or damage to the product is possible Performance may be severely degraded System or...

Страница 245: ...env_test4 2472 0473 Serious Mirror device not ready at time of periodic test env_test9 E473 0474 Serious Mirror device is write disable at time of periodic test env_test9 E474 0475 Serious One of the...

Страница 246: ...l rejected 14D2 04D3 Service Flex filter problems 24D3 04D4 Remote Service Remote connection closed Remote control disconnected 14D4 04DA Service Problems with task threads 24DA 04DB Service SYMPL scr...

Страница 247: ...target volume Device resynchronization process has begun On z OS these events are displayed as IEA480E Service Alert Error messages They have the format shown in Figure 58 on page 247 and Figure 59 o...

Страница 248: ...errors that have occurred in these components When an error occurs the operating system creates a record from the data captured by the hardware or software and writes it in the Error Reporting Dataset...

Страница 249: ...generate System Exception Reports daily From these reports you can determine whether errors are permanent or temporary the number of errors that have occurred and their frequency If your system repor...

Страница 250: ...further handling of a particular error based on its recoverability status location and frequency or take immediate action to correct the error source Determining the error source CAUTION Permanent da...

Страница 251: ...on the system operating console The format of the error data reported to the operator console depends on your operating system Sense byte data at the host is presented in 24 byte compatibility mode o...

Страница 252: ...or command transfer to from channel is complete Bit 37 Bit 5 Device end Device operation complete Bit 38 Bit 6 Unit check Symmetrix system detected an error condition Bit 39 Bit 7 Unit exception EOF o...

Страница 253: ...ort Note You can find a detailed description of these status bits in the appropriate IBM Principles of Operation Host sense byte data formats Sense byte formats are found in the IBM reference manual a...

Страница 254: ...254 EMC Symmetrix DMX 3 Product Guide Mainframe Features and Support...

Страница 255: ...y Tag This appendix contains the specifications of the Symmetrix DMX 3 system Storage control 256 Physical data 264 Environmental data 266 Power and cooling data 269 Electrical specifications and powe...

Страница 256: ...d based on the disk drive capacities of 73 GB 146 GB 300 GB 450 GB and 500 GB drives and these methods of data protection Mirroring RAID 1 RAID 5 3 1 or 7 1 RAID 6 6 2 or 14 2 Note The TB values shown...

Страница 257: ...en systems TB 7 04 140 82 Mainframe TB 6 95 139 02 Mirrored Open systems TB 3 52 70 41 Mainframe TB 3 48 69 51 RAID 5 3 1 Open systems TB 5 28 105 62 Mainframe TB 5 21 104 27 RAID 5 7 1 Open systems T...

Страница 258: ...y Open systems TB 14 08 281 66 Mainframe TB 13 90 278 04 Mirrored Open systems TB 7 04 140 83 Mainframe TB 6 95 139 02 RAID 5 3 1 Open systems TB 10 56 211 24 Mainframe TB 10 43 208 53 RAID 5 7 1 Open...

Страница 259: ...tems TB 28 78 575 54 Mainframe TB 28 41 568 15 Mirrored Open systems TB 14 39 287 77 Mainframe TB 14 20 284 08 RAID 5 3 1 Open systems TB 21 58 431 65 Mainframe TB 21 31 426 11 RAID 5 7 1 Open systems...

Страница 260: ...city Number of drives 96 1 920 Raw capacity Open systems TB 43 2 863 Mainframe TB 42 6 852 Mirrored Open systems TB 21 6 432 Mainframe TB 21 3 426 RAID 5 3 1 Open systems TB 32 4 542 Mainframe TB 32 0...

Страница 261: ...s TB 47 96 959 24 Mainframe TB 47 35 946 92 Mirrored Open systems TB 23 98 479 62 Mainframe TB 23 67 473 46 RAID 5 3 1 Open systems TB 35 97 542 Mainframe TB 35 51 542 RAID 5 7 1 Open systems TB 41 97...

Страница 262: ...5 tracks per cylinder 3380D emulationa a Contact your local EMC Sales Representative for 3380 and 3390 54 emulation availability 630 3380E emulationa 1 260 3380K emulationa 1 891 3390 1 emulation 946...

Страница 263: ...t your local EMC Sales Representative for 3380 and 3390 54 emulation availability 885 3380E emulationa 1 770 3380K emulationa 2 655 3390 1 emulation 1 113 3390 2 emulation 2 226 3390 3 emulation 3 339...

Страница 264: ...in 106 7 cm Rear 42 in 106 7 cm 42 in 106 7 cm Top 18 in 45 7 cm 18 in 45 7 cm a This measurement includes the top trim piece Without the trim piece the system bay height is 74 90 in 190 25 cm Table...

Страница 265: ...and three storage bays 8 892 lbs 4 033 3 kg System bay and four storage bays 11 314 lbs 5 131 9 kg System bay and five storage bays 13 736 lbs 6 230 5 kg System bay and six storage bays 16 158 lbs 7 3...

Страница 266: ...ure are unknown then allow the system to stabilize in the new environment for 16 hours EMC recommends opening both the front and rear doors of the system to facilitate environmental stabilization Do n...

Страница 267: ...erature 40o to 149o F 40o to 65o C Temperature gradient 43 2o F hr 24o C hr Relative humidity 10 to 90 noncondensing Maximum altitude 25 000 ft 7 619 7 m Table 46 Air volume generated System configura...

Страница 268: ...even storage bays b 8 84 71 8 System bay and eight storage bays b 8 88 72 2 a Average sound pressure measurement of the four standby positions per STATSKONTORET b Calculated value Table 47 Sound power...

Страница 269: ...iguration description a Total power consumption kVA Heat dissipation Btu Hr System bay 6 4 21 850 Storage bay 6 1 19 800 System bay with one storage bay 12 5 41 380 System bay with two storage bays 18...

Страница 270: ...Symmetrix DMX 3 power requirements on page 288 provides pre installation power site requirements The Symmetrix EMC DMX 3 Physical Planning Guide also provides additional planning information for powe...

Страница 271: ...se power source feeding the Symmetrix system depending on configuration The customer s electrician must be alerted to this possible condition to balance the phase by phase loading within the customer...

Страница 272: ...64 Russellstoll 9P54U2 Color BLK WHT RED GRN From P1 X P1 Y P1 Z P1 G To P2 X P2 Y P2 Z P2 G Signal L1 L2 L3 GND SYM 001095 PG DMX3 PCBL3DHR three phase four wire 50 AMP 200 240 VAC line to line Delta...

Страница 273: ...P D P 50A circuit breaker 50A circuit breaker 50A circuit breaker Location Location Location Location 8 AWG Type W 4 wire cable 8 AWG Type W 4 wire cable Zone B main input 200 240 VAC three phase 50 6...

Страница 274: ...e Symmetrix system depending on configuration The customer s electrician must be alerted to this possible condition to balance the phase by phase loading conditions within the customer s data center b...

Страница 275: ...LK GRY BLU GRN YEL From P1 X P1 Y P1 Z P1 W P1 G Signal L1 L2 L3 N GND SYM 001094 PG ABL SURSUM K52 30 P1 DMX3 PC3YFLE three phase five wire 32 AMP 200 240 VAC line to neutral WYE ABL SURSUM K52 30 Ma...

Страница 276: ...on Location Location Location Zone B main input 200 240 L N VAC three phase 50 60 Hz WYE connection Zone A main input 200 240 L N VAC three phase 50 60 Hz WYE connection 32A circuit breaker 32A circui...

Страница 277: ...77 B Invisible Body Tag This appendix provides instructions for powering the Symmetrix DMX 3 up and down Vaulting 278 Routinely powering up the Symmetrix DMX 3 279 Powering down the Symmetrix DMX 3 28...

Страница 278: ...hypers of designated drives These are called vault drives When a system is brought back online the vault hypers write the stored information back into global memory A vault save is initiated under the...

Страница 279: ...lowing procedures for powering up the Symmetrix DMX 3 for the first time If you have powered down the Symmetrix DMX 3 for an emergency condition call the EMC Service Support Center for assistance befo...

Страница 280: ...PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP PRI EXP...

Страница 281: ...ocesses to the Symmetrix DMX 3 Note If you are powering down the Symmetrix DMX 3 for an emergency condition stopping all processes to the system is not necessary 2 On the rear door of the system bay F...

Страница 282: ...282 EMC Symmetrix DMX 3 Product Guide Power Sequences...

Страница 283: ...ng or verifying the physical configuration of the Symmetrix DMX 3 or creating I O addressing schemes Planning overview 284 Symmetrix DMX 3 power requirements 288 System placement options 293 Planning...

Страница 284: ...related to installation Table 53 on page 284 lists the responsibility summary at the first planning session Symmetrix DMX 3 presite considerations When planning the installation site for your Symmetr...

Страница 285: ...tion Direct dial up phone line for remote support within six feet two meters of the unit Remote support on page 287 System cabling and power cabling routing requirements The Presite Survey completed w...

Страница 286: ...DMX 3 system the raised floor the subfloor and the surrounding infrastructure WARNING Before the Symmetrix DMX 3 bays are rolled into position in the computer room note how close the wheels are to the...

Страница 287: ...Symmetrix DMX 3 EMC has formed partnerships with specially selected moving companies These companies have moving professionals trained in the proper handling of large and very sensitive systems These...

Страница 288: ...the Symmetrix DMX 3 system bay and each storage bay Figure 69 DMX 3 system bay and storage bay to customer PDU power cabling Zone B AC input cable B Cable connectors are shown as they exit the bottom...

Страница 289: ...n o Z r e w o L t n a t r o p m I l a u n a m n o i t c u r t s n i o t r e f e R r e w o P r e m o t s u C 2 e c r u o S r e w o P r e m o t s u C 1 e c r u o S Important P N 300 002 377 046 002 631_...

Страница 290: ...the cabinet and not on the kVA figures of a particular configuration The kVA values listed in this product guide Power and cooling data on page 269 are intended for air conditioning and utility loadi...

Страница 291: ...lation To measure the Protective Conductor Current the procedure for measuring Touch Current is used but the measuring instrument is replaced by an ammeter of negligible impedance The cross sectional...

Страница 292: ...ose for the Symmetrix UPS solution should match that of the host system The Symmetrix system requires independent Zone B and Zone A power feeds The UPS should be equipped with an internal output isola...

Страница 293: ...ay frame is then aligned with the storage bay frames and are bolted together later When the system bay and all the storage bay doors are closed the system bay is slightly recessed in relation to the s...

Страница 294: ...se requirements could result in severe damage to the Symmetrix DMX 3 system the raised floor the subfloor and the surrounding infrastructure NOTWITHSTANDING ANYTHING TO THE CONTRARY IN ANY AGREEMENT B...

Страница 295: ...supporting the system weight EMC recommends the use of 24 x24 in heavy duty concrete filled steel floor tiles If different size or type tiles are used customer must ensure that the tiles have a minimu...

Страница 296: ...the load associated with the Symmetrix DMX 3 storage system is to have a certified architect or the data center design consultant inspect the specifications of the floor to ensure that the floor is c...

Страница 297: ...for various DMX 3 configurations Figure 72 One system bay and eight storage bays B B B A B A A A A Front 25 in 64 cm Gap between cabinets 42 00 in 106 68 cm Service area front and rear 42 00 in 106 68...

Страница 298: ...systems Table 17 on page 77 describes each type of host channel director combination currently supported Use the following planning worksheet Table on page 299 to determine the total quantity of Symme...

Страница 299: ...N ports Gig E MM ports DMX3 80000B Fibre MM 8 ports DMX3 71000B Fibre MM 7 ports Fibre SM 1 port DMX3 62000B Fibre MM 6 ports Fibre SM 2 ports DMX3 00004B FICON SM 4 ports DMX3 00040B FICON MM 4 ports...

Страница 300: ...E MM ports DMX3 00103BS FICON SM 3 ports GigE IPv4 v6 IPsec capable MM 1 port DMX3 00400BS GigE IPv4 v6 IPsec capable MM 4 ports DMX3 40200BS FIbre MM 4 ports GigE IPv4 v6 IPsec capable MM 2 ports DMX...

Страница 301: ...ystems Engineer This information is necessary for each Symmetrix system you are installing Table 55 on page 301 Table 55 Symmetrix checklist for UNIX or PC server hosts Symmetrix model Total number of...

Страница 302: ...r host Type of host Fibre Channel iSCSI channel adapter used on host type and model number Is this a clustered environment Which one Will devices be shared Which ones Total number of host Fibre Channe...

Страница 303: ...queries Any patches or modifications related to I O Fibre Channel Additional comments a This is the volume size needed for each volume visible on the Fibre Channel path b Percentage of available Symme...

Страница 304: ...coupler FC3M 50MSLC SC LC 3 meter w SC coupler FC3M 9MSLC SC LC 3 meter w coupler FC5M 50MSLC SC LC 5 meter FC5M 9MSLC SC LC 5 meter FC10M 50MSLC SC LC 10 meter FC10M 9MSLC SC LC 10 meter FC30M 50MSLC...

Страница 305: ...M 62MSLC SC LC 5 meter For Symmetrix DMX 3 GigE iSCSI connection to patch panels or Ethernet switches using LC connectors FC10M 62MSLC SC LC 10 meter FC30M 62MSLC SC LC 30 meter FC50M 62MSLC SC LC 50...

Страница 306: ...ollowing site profile information from the Customer Engineer or Systems Engineer This information is necessary for each Symmetrix system you are installing Table 59 on page 306 Table 59 Symmetrix chec...

Страница 307: ...0 meter FC100M 62MSLC SC LC 100 meter FC1M 62MLC LC LC 1 meter For Symmetrix DMX 3 ESCON direct connection or connection to patch panels or ESCON switches using LC connectors FC3M 62MLC LC LC 3 meter...

Страница 308: ...ontact your local EMC Sales Representative Table 61 EMC Fibre cables FICON 9 micron connect Model number Description FC1M 9MSLC SC LC 1 m w coupler FC3M 9MSLC SC LC 3 m w coupler FC5M 9MSLC SC LC 5 m...

Страница 309: ...nt within a head and disk assembly HDA adapter A board that provides the physical interface between the director and disk drives disk adapter and various host channels Fibre Channel iSCSI GigE FICON a...

Страница 310: ...ransfers data between the channel and global memory CCOPY Concurrent Copy Facility used on IBM DASD command descriptor block CDB The structure used to communicate commands from an initiator to a targe...

Страница 311: ...y defines a physical I O device on a channel path in an MVS environment See also unit address device form factor Refers to the physical size and shape of a device Example 73 GB disk drive is a 1 in di...

Страница 312: ...ronment for the EMC Symmetrix Enterprise Storage Platforms Enginuity provides functional services for both its host Symmetrix systems as well as for a large suite of EMC Storage Application software E...

Страница 313: ...nd networking FC AL Fibre Channel Arbitrated Loop A standard for a shared access loop in which a number of Fibre Channel devices are connected as opposed to point to point transmissions Requires a por...

Страница 314: ...hypervolume extension The ability to define more than one logical volume on a single physical disk drive making use of its full formatted capacity These logical volumes are user selectable in size The...

Страница 315: ...ical unit logical unit number LUN An encoded three bit identifier for the logical unit of a SCSI device logical volume LV A user defined storage device In the Symmetrix subsystem for example the user...

Страница 316: ...cal device through concatenating striping mirroring logging the physical devices or setting up RAID devices MII Machine Initiated Interrupt mirroring The Symmetrix option that maintains two identical...

Страница 317: ...e allocated is an integral number of physical partitions By default a PP is 4 MB in size physical ID Physical identification number of the Symmetrix director for EREP usage This value automatically in...

Страница 318: ...e establishes the connection reserved The term used for bits bytes fields and code values that are set aside for future standardization S SCSI Small Computer System Interface SCSI address The octal re...

Страница 319: ...hannel director string A series of connected disk drives sharing the same disk director striping The process of segmenting logically sequential data and writing the segments to multiple physical disk...

Страница 320: ...ithin another directory is a subdirectory The two most common types of UNIX are BSD Berkeley Software Distribution and System VR4 developed by AT T Most UNIX systems are a mix of both types V vault de...

Страница 321: ...193 block capacity 70 128 block format sizes 69 business continuance volumes BCVs 193 C cables ESCON 307 308 fiber optic multimode 92 95 single mode 92 95 cache memory host cache use 102 cache partiti...

Страница 322: ...time 105 106 disk adapters 37 172 disk device capacities 64 disk devices 37 62 172 capacity 134 cylinders logical volume 264 emulation types 71 error correction and verification 177 FBA data and comm...

Страница 323: ...basic operation 108 director 37 83 117 172 management 103 to 104 prefetch algorithm 104 requirements for PermaCache 121 sizes 83 global memory techniques 113 disk microprocessor and buffer 113 high sp...

Страница 324: ...t 230 PC server hosts 128 PDS Assist 230 pend time 105 performance features 33 channel speed 125 fast write capabilities 120 hypervolume extension 127 132 mainframe systems hypervolume extension 132 t...

Страница 325: ...F Automated Replication 222 SRDF CG 222 SRDF Cluster Enabler 222 SRDF Consistency Groups 222 SRDF Data Mobility 221 SRDF DM 221 SRDF S 221 SRDF Star 222 SRDF Synchronous 221 SSID 230 storage directors...

Страница 326: ...ts 154 track capacity 74 track format 73 types of errors 240 to 242 data check 240 equipment checks 240 overrun 240 system or program check 240 U unit status bits 252 UNIX 68 UNIX hosts 128 V vault 17...

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