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Sun Microsystems StorEdge 3000 Series, Best Practices Manual

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35

C H A P T E R

5

SAN Configurations

This chapter presents several SAN configurations you can use.

Full-Duplex SAN Configurations

FIGURE

 

5-1 

Typical Full-Fabric SAN Configuration

Note – 

Do not use a Sun StorEdge 3511 SATA array to store single instances of data. 

It is more suitable for use in configurations where the array has a backup or archival 
role.

 

Summary of Contents for StorEdge 3000 Series

Page 1: ...Inc www sun com Submit comments about this document at http www sun com hwdocs feedback Sun StorEdge 3000 Family Best Practices Manual Sun StorEdge 3510 FC and 3511 SATA Arrays Part No 816 7325 22 March 2007 Revision A ...

Page 2: ...INVALID Copyright 2002 2007 Dot Hill Systems Corporation et d autres 2200 Faraday Avenue Suite 100 Carlsbad Californie 92009 Etats Unis Tous droits réservés Sun Microsystems Inc et Dot Hill Systems Corporation peuvent avoir les droits de propriété intellectuels relatants à la technologie incorporée dans le produit qui est décrit dans ce document En particulier et sans la limitation ces droits de p...

Page 3: ...y and Sun StorEdge 3511 SATA Array 4 2 Underlying Concepts and Practices 7 Fibre Channel Protocols 7 Supported RAID Levels 8 Logical Drives 8 Maximum Drive Configurations per Array 9 Maximum Number of Disks and Maximum Usable Capacity per Logical Drive 10 Cache Optimization 12 Configuring an Array s RCCOM Channel 14 Using Four DRV RCCOM Channels 14 Using Channels 4 and 5 as RCCOM Channels 14 Array...

Page 4: ...ns 25 Single Controller DAS Tips and Techniques 26 Single Controller DAS Setup Details 27 Dual Controller Multipath DAS Configurations 29 Dual Controller Multipath DAS Tips and Techniques 30 Sample Dual Controller Multipath DAS Setup Details 31 5 SAN Configurations 35 Full Duplex SAN Configurations 35 Full Duplex SAN Tips and Techniques 36 Sample Full Duplex SAN Setup Details 37 Redundant Point to...

Page 5: ...s 55 7 Sun StorEdge 3511 SATA Array High Capacity Configurations 57 Connecting One Expansion Unit 58 Connecting Two Expansion Units 59 Connecting Three Expansion Units 60 Connecting Four Expansion Units 62 Connecting Five Expansion Units 64 8 Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units 67 Restrictions on the Use of Expansion Unit Combinations 67 Connecting Two ...

Page 6: ...vi Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 7: ...e 3510 FC Full Duplex SAN Connections 37 FIGURE 5 3 Sample Sun StorEdge 3511 SATA Full Duplex SAN Connections 38 FIGURE 5 4 Sample Redundant Point to Point SAN Configuration 39 FIGURE 5 5 Sample Redundant Point to Point Sun StorEdge 3510 SAN Connections 41 FIGURE 5 6 Sample Redundant Point to Point Sun StorEdge 3511 SAN Connections 41 FIGURE 6 1 Sun StorEdge 3510 FC Array Configuration with One Ex...

Page 8: ...nfiguration with One Expansion Unit 58 FIGURE 7 2 Sun StorEdge 3511 SATA Array Configuration with Two Expansion Units 59 FIGURE 7 3 Sun StorEdge 3511 SATA Array Configuration with Three Expansion Units 61 FIGURE 7 4 Sun StorEdge 3511 SATA Array Configuration with Four Expansion Units 63 FIGURE 7 5 Sun StorEdge 3511 SATA Array Configuration with Five Expansion Units 65 FIGURE 8 1 Sun StorEdge 3510 ...

Page 9: ...LE 2 2 Maximum Number of Supported Physical and Logical Drives Partitions and LUN Assignments 10 TABLE 2 3 Actual Capacities per Drive 11 TABLE 2 4 Maximum Usable Storage Capacity Determined by RAID Level 11 TABLE 2 5 Default Stripe Size Per Optimization Mode Kbyte 13 ...

Page 10: ...x Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 11: ...ter 2 provides an overview of important concepts and practices that underlie the configurations you can use Chapter 3 helps you determine which direct attached storage DAS and storage area network SAN configurations are most appropriate to your requirements Chapter 4 presents several sample DAS configurations you can use Chapter 5 presents several sample SAN configurations you can use Chapter 6 de...

Page 12: ...nd serviceability Using UNIX Commands This document might not contain information on basic UNIX commands and procedures such as shutting down the system booting the system and configuring devices Refer to the following for this information Software documentation that you received with your system Solaris operating environment documentation which is at http docs sun com Shell Prompts Shell Prompt C...

Page 13: ...ns You must be superuser to do this To delete a file type rm filename Title Part Number Sun StorEdge 3510 FC Array and Sun StorEdge 3511 SATA Array Release Notes 817 6597 Sun StorEdge 3000 Family Installation Operation and Service Manual for the Sun StorEdge 3510 FC Array and Sun StorEdge 3511 SATA Array 816 7300 Sun StorEdge 3000 RAID Firmware 4 2 User s Guide 817 3711 Sun StorEdge 3000 Family Co...

Page 14: ...ews and troubleshooting tips review the Release Notes at the locations shown in Accessing Sun Documentation on page xiv If you have technical questions about this product that are not answered in the documentation go to http www sun com service contacting To initiate or check on a USA only service request contact Sun support at 800 USA 4SUN To obtain international technical support contact the sal...

Page 15: ... previous Accessing Sun Documentation section Additionally the software and firmware applications provide keyboard navigation and shortcuts that are documented in the user s guides Sun Welcomes Your Comments Sun is interested in improving its documentation and welcomes your comments and suggestions You can submit your comments by going to http www sun com hwdocs feedback Please include the title a...

Page 16: ...xvi Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 17: ...ning configurations Choosing the solution that best matches your particular environment will provide the best results Executive Summary Before reading the detailed information in this document review this high level overview of factors that affect the reliability availability and serviceability RAS of not only your storage arrays but your system as a whole RAS Features of Sun StorEdge 3000 Family ...

Page 18: ...e RAID array s cache optimization mode determines the cache block size used by the controller for all logical drives For sequential optimization the cache block size is 128 Kbyte For random optimization the cache block size is 32 Kbyte User configurable stripe size When you create a logical drive you can replace the default stripe size with one that better suits your application For sequential opt...

Page 19: ...s operating system and in third party backup software including some useful links to other system administration documentation http www sun com bigadmin features articles backup_zones html Another useful feature article Installing and Configuring Sun Cluster 3 1 09 04 Software for High Availability Applications provides an excellent overview of strategies to design an environment where services ca...

Page 20: ...age system throughput by distributing a workload across the storage system Differences Between Sun StorEdge 3510 FC Array and Sun StorEdge 3511 SATA Array The Sun StorEdge 3510 FC array is a next generation Fibre Channel storage system designed to provide direct attached storage DAS to entry level mid range and enterprise servers or to serve as the disk storage within a storage area network SAN Th...

Page 21: ...by Sun Microsystems in primary online applications as well as secondary and near line applications Sun StorEdge 3511 SATA arrays are supported by Sun Microsystems in either near line applications such as backing up and restoring data or secondary applications such as static storage Sun StorEdge 3510 FC arrays can be used in multipath and multi host configurations but they are not designed to be us...

Page 22: ...6 Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 23: ...ll duplex use of the available channel bandwidth whereas using the FC AL protocol limits host channels to half duplex communication In a point to point configuration only one ID can be assigned to each host channel If more than one ID is assigned the point to point protocol rules are violated Any host channel with more than one ID will not be able to log into an FC switch in fabric mode This one I...

Page 24: ...levels and spare drives are implemented Logical Drives A logical drive LD is a group of physical drives configured with a RAID level Each logical drive can be configured for a different RAID level Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays support a maximum of 32 logical drives A logical drive can be managed by either the primary or secondary controller The best practice for cre...

Page 25: ...are is 16 Tbyte with random optimization 64 Tbyte with sequential optimization Since Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays also support up to 32 logical drives each it is unlikely these limits will restrict configurations Note Create several logical drives when using configurations with many disks Creating a logical drive with a very large number of disks is not advisable M...

Page 26: ...l Volume LUN Assignments Sun StorEdge 3510 FC array 108 1 array and 8 expansion units 32 32 32 128 point to point mode 64 point to point mode redundant configuration 1024 loop mode 512 loop mode redundant configuration Sun StorEdge 3511 SATA array 72 1 array and 5 expansion units 32 32 32 128 point to point mode 64 point to point mode redundant configuration 1024 loop mode 512 loop mode redundant ...

Page 27: ...mum usable storage capacity for Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays using the maximum number of expansion units fully populated with the largest currently available drives Note Be sure to check the latest release notes for your array to see additional guidelines or limitations for large configurations Each logical drive can be partitioned into up to 32 separate partitions...

Page 28: ...the LUN For example suppose partition 0 of LD 0 is mapped to Channel 0 PID 42 and Channel 5 PID 47 To ensure that there is no single point of failure SPOF connect a cable from the host HBA or a switch port to the upper board port FC 0 and connect a second cable from the lower board port FC 5 to a different host HBA or switch Cache Optimization Sun StorEdge 3000 family arrays provide settings for b...

Page 29: ...onfiguration chapter of the Sun StorEdge 3000 Family Configuration Service User s Guide and the Sun StorEdge 3000 Family CLI 2 0 User s Guide for more information Depending on the optimization mode and RAID level selected newly created logical drives are configured with the default stripe sizes shown in TABLE 2 5 When you create a logical drive you can replace the default stripe size with one that...

Page 30: ...Four DRV RCCOM Channels If only channels 0 and 1 are used for communication with servers channels 4 and 5 can be configured as DRV RCCOM providing four DRV RCCOM channels channels 2 3 4 and 5 An advantage of this configuration is channels 4 and 5 are still available for connection of expansion units The impact of RCCOM is reduced because it is now distributed over four channels instead of two If a...

Page 31: ...information can be passed to other programs Note To set up and use Sun StorEdge Configuration Service refer to the Sun StorEdge 3000 Family Configuration Service User s Guide The Sun StorEdge CLI is installed as part of the SUNWsccli package Information about CLI functionality can be found in the Sun StorEdge 3000 Family CLI User s Guide and in the sccli man page once the package is installed SATA...

Page 32: ...ation NVRAM can be saved to disk This provides a backup of the controller dependent configuration information such as channel settings host IDs FC protocol and cache configuration It does not save LUN mapping information The NVRAM configuration file can restore all configuration settings but does not rebuild logical drives Sun StorEdge Configuration Service and the Sun StorEdge CLI can be used to ...

Page 33: ...ibre Channel FC storage switch between network servers and storage systems A SAN solution shares a storage system among multiple servers using FC storage switches and reduces the total number of storage systems required for a particular environment at the cost of additional element management FC switches and FC path complexity FIGURE 3 1 DAS and SAN Storage Architectures Selecting the best storage...

Page 34: ...in external Fibre Channel ports if available or add in Fibre Channel host adapter cards Sun StorEdge 3510 FC arrays automatically configure ports to match the transfer speed and communication method of each connection Note Some older 1 Gbyte FC HBAs do not correctly support current auto negotiation In such configurations set the transfer speed to 1 Gbyte rather than Auto Refer to the release notes...

Page 35: ...ant configurations For information about obtaining and relocating SFP modules refer to the Sun StorEdge 3000 Family Installation Operation and Service Manual for the Sun StorEdge 3510 FC Array and Sun StorEdge 3511 SATA Array Note Except in some clustering configurations in a DAS loop configuration when you connect two hosts to channel 0 both FC 0 ports of either controller or channel 1 both FC 1 ...

Page 36: ...llowing network characteristics Applications suitable for the Sun StorEdge 3511 SATA array might feature higher bandwidth and lower IOPS than those better suited to the Sun StorEdge 3510 FC array Sharing a StorEdge 3511 SATA array effectively among several servers depends upon the division of performance among the applications installed on each server actively accessing the Sun StorEdge 3511 SATA ...

Page 37: ...y created starting with a system with five disks and then adding one or more disks Expansion units can be dynamically added to base systems when more storage capacity is required than a single Sun array can provide Note A Sun StorEdge 3510 FC array can be connected to as many as eight Sun StorEdge 3510 FC expansion units Alternatively Sun StorEdge 3510 FC arrays can be connected to as many as five...

Page 38: ...If you connect two servers to channel 0 or to channel 1 use host filtering if you want to control host access to logical drives With either the Sun StorEdge 3510 FC array or the Sun StorEdge 3511 SATA array a SAN solution can be a powerful option even when the array is connected to a number of servers that can otherwise be supported in a DAS solution Combining both the Sun StorEdge 3510 FC array a...

Page 39: ...rEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays are extremely flexible but when designing storage solutions remember to keep them as simple as possible Keep the following suggestions in mind when designing the configuration of a Fibre Channel storage system To ensure power redundancy connect the two power modules to two separate circuits such as one commercial circuit and one UPS In a singl...

Page 40: ...rmware to assign a password to the RAID controller Changing the firmware s Network Protocol Support settings can provide further security by disabling the ability to remotely connect to the array using individual protocols such as HTTP HTTPS telnet FTP and SSH Changing the firmware s Network Protocol Support settings can provide further security by disabling the ability to remotely connect to the ...

Page 41: ...nt a connection becomes unreliable or fails This is not a recommended configuration unless host based mirroring is utilized to protect against single points of failure Similarly using only a single controller creates a single point of failure unless single controllers are used in pairs and mirrored Using a dual controller configuration as shown in Dual Controller Multipath DAS Configurations on pa...

Page 42: ...r can be configured to support up to four host connections Sun StorEdge 3510 FC array or six host connections Sun StorEdge 3511 SATA array These connections can be used in pairs individually or in any combination of both You need to add SFP modules to support more than two host connections to the Sun StorEdge 3510 FC array or Sun StorEdge 3511 SATA array For information about adding SFP modules re...

Page 43: ...ility and serviceability See General Configuration Considerations on page 23 for more information Single Controller DAS Setup Details FIGURE 4 2 shows a single controller Sun StorEdge 3510 FC array in a DAS configuration FIGURE 4 3 shows a single controller Sun StorEdge 3511 SATA array in a DAS configuration FIGURE 4 2 Sample Single Controller Sun StorEdge 3510 FC DAS Connections Server 1 Server 2...

Page 44: ...or Sun StorEdge 3511 SATA Array High Capacity Configurations on page 57 For information about connecting Sun StorEdge 3511 SATA expansion units to Sun StorEdge 3510 FC arrays see Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units on page 67 3 Configure cache optimization 4 Create one Logical Drive for each server and configure spare disks 5 Map Logical Drive 0 to cont...

Page 45: ...r if needed to controller port FC4 13 After completing the configuration save the configuration using the Save nvram to disks menu option in the firmware application or the save configuration option in Sun StorEdge Configuration Service Dual Controller Multipath DAS Configurations FIGURE 4 4 Sample Dual Controller Multipath DAS Configurations Single Server Dual Servers Quad Servers ...

Page 46: ...torEdge 3510 FC array or Sun StorEdge 3511 SATA array For information about adding SFP modules refer to the Sun StorEdge 3000 Family Installation Operation and Service Manual for the Sun StorEdge 3510 FC array and the Sun StorEdge 3511 SATA array Using two single port 2 Gbit FC host adapters in a high availability configuration makes optimum use of a Fibre Channel array s redundancy Mapping logica...

Page 47: ...GURE 4 6 shows a Sun StorEdge 3511 SATA array in a dual controller multipath DAS configuration FIGURE 4 5 Sample Dual Controller Multipath Sun StorEdge 3510 DAS Connections Note Do not use a Sun StorEdge 3511 SATA array to store single instances of data It is more suitable for use in configurations where the array has a backup or archival role Server 1 Server 3 Server 2 Server 4 ...

Page 48: ...on page 43 or Sun StorEdge 3511 SATA Array High Capacity Configurations on page 57 For information about connecting Sun StorEdge 3511 SATA expansion units to Sun StorEdge 3510 FC arrays see Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units on page 67 3 Configure cache optimization 4 Ensure that the fibre connection is set to loop mode 5 Configure target IDs 6 Create ...

Page 49: ...e lower controller and port FC 4 of the upper controller 13 Connect the third server Server 3 if needed to port FC 0 of the lower controller and port FC 5 of the upper controller 14 Connect the fourth server Server 4 if needed to port FC 1 of the upper controller and port FC 4 of the lower controller 15 Install and enable multipathing software on each connected server 16 After completing the confi...

Page 50: ...34 Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 51: ...urations you can use Full Duplex SAN Configurations FIGURE 5 1 Typical Full Fabric SAN Configuration Note Do not use a Sun StorEdge 3511 SATA array to store single instances of data It is more suitable for use in configurations where the array has a backup or archival role ...

Page 52: ...itches limits to 128 the total number of LUNs that can be presented Fibre channel standards allow only one ID per port when operating point to point protocols resulting in a maximum of four IDs with a maximum of 32 LUNs each supporting up to 128 LUNs When a fabric switch is connected to one port of channel 0 or channel 1 of a Sun StorEdge 3511 SATA array no connections can be made with the other t...

Page 53: ...s FIGURE 5 2 shows a Sun StorEdge 3510 FC array in a full duplex SAN configuration FIGURE 5 3 shows a Sun StorEdge 3511 SATA array in a full duplex SAN configuration FIGURE 5 2 Sample Sun StorEdge 3510 FC Full Duplex SAN Connections Server 1 Server 2 Switch 1 Switch 2 ...

Page 54: ... or Sun StorEdge 3511 SATA Array High Capacity Configurations on page 57 For information about connecting Sun StorEdge 3511 SATA expansion units to Sun StorEdge 3510 FC arrays see Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units on page 67 3 Configure cache optimization 4 Ensure that the fibre connection is set to point to point 5 Ensure only one target ID per chann...

Page 55: ...controller and port FC 1 of the lower controller 12 Connect the second switch to port FC4 of the lower controller and port FC5 of the upper controller 13 Connect each server to each switch 14 Install and enable multipathing software on each connected server 15 After completing the configuration save the configuration using the Save nvram to disks menu option in the firmware application or the save...

Page 56: ...the total number of LUNs that can be presented Fibre channel standards allow only one ID per port when operating point to point protocols resulting in a maximum of four IDs with a maximum of 32 LUNs each supporting up to 128 LUNs When a fabric switch is connected to one port of channel 0 or channel 1 of a Sun StorEdge 3511 SATA array no connections can be made with the other three ports of that ch...

Page 57: ...RE 5 5 Sample Redundant Point to Point Sun StorEdge 3510 SAN Connections FIGURE 5 6 Sample Redundant Point to Point Sun StorEdge 3511 SAN Connections Server 1 Server 2 Switch 1 Switch 2 H D RCC H D RCC Server 1 Server 2 Switch 1 Switch 2 ...

Page 58: ...al Drive 1 to the secondary controller 9 Create one or more logical drive partitions for each server 10 Map the LUNs from even numbered logical drives beginning with Logical Drive 0 to channels 0 and 4 of the primary controller 11 Map the LUNs from even numbered logical drives beginning with Logical Drive 1 to channels 1 and 5 of the secondary controller Note See Fibre Channel Protocols on page 7 ...

Page 59: ...tions for up to eight Sun StorEdge 3510 FC expansion units The following chapter shows you sample configurations for up to five Sun StorEdge 3511 SATA expansion units when connected to a Sun StorEdge 3511 SATA array Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units on page 67 describes how you might connect three Sun StorEdge 3511 expansion units and two Sun StorEdge...

Page 60: ... drive ports They must be combined with a standard configuration shown in this document such as shown in Redundant Point to Point SAN Configurations on page 39 Limitations Maximize the size of each logical drive before creating another logical drive Otherwise the maximum number of 32 logical drives might limit future expansion Limiting the maximum number of expansion units on a Sun StorEdge 3510 F...

Page 61: ...Chapter 6 Using Multiple Expansion Units in High Capacity Configurations 45 Connecting One Expansion Unit FIGURE 6 1 Sun StorEdge 3510 FC Array Configuration with One Expansion Unit ...

Page 62: ...46 Sun StorEdge 3000 Family Best Practices Manual March 2007 Connecting Two Expansion Units FIGURE 6 2 Sun StorEdge 3510 FC Array Configuration with Two Expansion Units ...

Page 63: ...Chapter 6 Using Multiple Expansion Units in High Capacity Configurations 47 Connecting Three Expansion Units FIGURE 6 3 Sun StorEdge 3510 FC Array Configuration with Three Expansion Units ...

Page 64: ...48 Sun StorEdge 3000 Family Best Practices Manual March 2007 Connecting Four Expansion Units FIGURE 6 4 Sun StorEdge 3510 FC Array Configuration with Four Expansion Units ...

Page 65: ... to RAID channels 0 and 1 affecting supported host configurations Use four expansion units or fewer when possible Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them ...

Page 66: ...50 Sun StorEdge 3000 Family Best Practices Manual March 2007 FIGURE 6 5 Sun StorEdge 3510 FC Array Configuration with Five Expansion Units ...

Page 67: ...to RAID channels 0 and 1 affecting supported host configurations Use four expansion units or fewer when possible Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them u...

Page 68: ...52 Sun StorEdge 3000 Family Best Practices Manual March 2007 FIGURE 6 6 Sun StorEdge 3510 FC Array Configuration with Six Expansion Units ...

Page 69: ...s to RAID channels 0 and 1 affecting supported host configurations Use four expansion units or fewer when possible Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them...

Page 70: ...54 Sun StorEdge 3000 Family Best Practices Manual March 2007 FIGURE 6 7 Sun StorEdge 3510 FC Array Configuration with Seven Expansion Units ...

Page 71: ...s to RAID channels 0 and 1 affecting supported host configurations Use four expansion units or fewer when possible Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them...

Page 72: ...56 Sun StorEdge 3000 Family Best Practices Manual March 2007 FIGURE 6 8 Sun StorEdge 3510 FC Array Configuration with Eight Expansion Units ...

Page 73: ...ghly recommended for host connections as shown in Full Duplex SAN Configurations on page 35 Refer to the Sun StorEdge 3000 Family FRU Installation Guide for information about supported disk drives cables SFPs and other user replaceable items Note The following high capacity configurations illustrate cabling techniques for drive ports They must be combined with a standard configuration described in...

Page 74: ...58 Sun StorEdge 3000 Family Best Practices Manual March 2007 Connecting One Expansion Unit FIGURE 7 1 Sun StorEdge 3511 SATA Array Configuration with One Expansion Unit H D RCC H D RCC ...

Page 75: ...Chapter 7 Sun StorEdge 3511 SATA Array High Capacity Configurations 59 Connecting Two Expansion Units FIGURE 7 2 Sun StorEdge 3511 SATA Array Configuration with Two Expansion Units H D RCC H D RCC ...

Page 76: ... host connections to RAID channels 0 and 1 affecting supported host configurations Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them unacceptable as a best practice...

Page 77: ...Chapter 7 Sun StorEdge 3511 SATA Array High Capacity Configurations 61 FIGURE 7 3 Sun StorEdge 3511 SATA Array Configuration with Three Expansion Units H D RCC H D RCC ...

Page 78: ...host connections to RAID channels 0 and 1 affecting supported host configurations Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them unacceptable as a best practice ...

Page 79: ...Chapter 7 Sun StorEdge 3511 SATA Array High Capacity Configurations 63 FIGURE 7 4 Sun StorEdge 3511 SATA Array Configuration with Four Expansion Units H D RCC H D RCC ...

Page 80: ...host connections to RAID channels 0 and 1 affecting supported host configurations Note Other daisy chained cable connections are possible that do not require reconfiguring RAID channels 4 and 5 as drive channels However these connections introduce a single point of failure where the failure of an expansion unit can render another expansion unit unusable making them unacceptable as a best practice ...

Page 81: ...Chapter 7 Sun StorEdge 3511 SATA Array High Capacity Configurations 65 FIGURE 7 5 Sun StorEdge 3511 SATA Array Configuration with Five Expansion Units H D RCC H D RCC ...

Page 82: ...66 Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

Page 83: ...e can include any combination of Sun StorEdge 3510 expansion units and Sun StorEdge 3511 expansion units In contrast if using only Sun StorEdge 3510 expansion units a maximum of eight expansion units can be added to a Sun StorEdge 3510 array Restrictions on the Use of Expansion Unit Combinations Some practices that involve combining Sun StorEdge 3511 SATA expansion units with Sun StorEdge 3510 FC ...

Page 84: ...1 might be appropriate During the day logical drives using only FC disks could be dedicated to mission critical online transaction processing I O operations After working hours other logical drives composed of the slower SATA drives in the two Sun StorEdge 3511 SATA expansion units could be used to backup the transaction data from the FC logical drives They could also be used for onsite disk based...

Page 85: ...Chapter 8 Combining Sun StorEdge 3510 FC Arrays and Sun StorEdge 3511 SATA Expansion Units 69 FIGURE 8 1 Sun StorEdge 3510 FC Array with Two FC Expansion Units and Three SATA Expansion Units ...

Page 86: ...70 Sun StorEdge 3000 Family Best Practices Manual March 2007 ...

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