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Chapter

3

Environmental Monitoring Unit

This chapter contains information concerning the multiformity EMU, including product
description, configuration, functionality, and status indications.

Product Description

The EMU monitors the enclosure status, reports error conditions, and controls some
enclosure functions. The EMU mounts in the front of the enclosure (see Figure 3–1).

Figure 3–1. EMU location

CXO6867A

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Summary of Contents for StorageWorks 2100

Page 1: ...Compaq StorageWorks Third Edition June 2000 Part Number EK SE2C8 UA C01 Compaq Computer Corporation Model 2100 and 2200 Ultra SCSI Controller Enclosures User Guide...

Page 2: ...OR ANY DIRECT CONSEQUENTIAL INCIDENTIAL SPECIAL PUNITIVE OR OTHER DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMA...

Page 3: ...ments xvi Chapter 1 Introducing the Controller Enclosure Product Description 1 2 Prerequisites 1 3 Enclosure Power 1 5 Controller Sets 1 5 Storage CRUs 1 5 Ultra SCSI Buses 1 6 Communication Ports 1 6...

Page 4: ...tion 3 2 Functionality 3 2 Status Indications 3 3 Audible Alarm 3 4 Alphanumeric Displays 3 5 SCSI Target ID Address 3 5 Horn Mode 3 6 Error Codes 3 6 EMU Reset Conditions 3 8 Alarm Reminder Tones 3 8...

Page 5: ...pply 8 8 ECB Battery Pack and ECB 8 10 Replacing an ECB Battery Pack 8 10 Replacing an ECB 8 12 Fan 8 14 Array Controllers and Cache Modules 8 16 Removing an Array Controller or Cache Module 8 17 Inst...

Page 6: ...Connecting Ultra SCSI Bus Cables and Host Cabling C 3 Ultra SCSI Bus Cables C 3 Host Cables C 4 Installing the Power Supplies C 4 Configuring the Enclosure C 4 Appendix D Error Code Data Alarms D 2 Fa...

Page 7: ...ternal connector view 4 2 Figure 4 3 I O module bay and bus number correlation 4 2 Figure 5 1 Power supply locations 5 1 Figure 5 2 180 W power supply bezel label 5 2 Figure 5 3 Power supply status LE...

Page 8: ...he module locations 8 16 Figure 8 11 Array controller removal and installation 8 16 Figure 8 12 Cache module removal and installation 8 17 Figure A 1 Product label showing country specific certificati...

Page 9: ...ing an EMU 8 5 Table 8 3 Installing an EMU 8 5 Table 8 4 Removing an I O Module 8 7 Table 8 5 Installing an I O Module 8 7 Table 8 6 Removing a Power Supply 8 8 Table 8 7 Installing a Power Supply 8 9...

Page 10: ...mental Specifications B 4 Table B 5 Nonoperating Environmental Specifications B 4 Table C 1 Procedural References for Removing Elements C 2 Table C 2 Installing Ultra SCSI Bus Cables C 4 Table D 1 Ala...

Page 11: ...figuring installing and maintaining SCSI controller enclosures How This Guide is Arranged This manual discusses the enclosure and its major elements The manual is organized as follows Chapter 1 Introd...

Page 12: ...d status indications Chapter 6 External Cache Battery Provides the external cache battery ECB product description status indications and configuration Chapter 7 Fans Provides the fan assembly product...

Page 13: ...ks array controller as an HSG series array controller however any array controller supported by the Model 2100 or 2200 enclosure can be installed Model 2100 enclosures use array controllers that suppo...

Page 14: ...for horn mode and En for enabled SMALL CAPS Used to indicate the status of an LED For example FLASHING means turning on and off ON means on and OFF means off italic type Italic type emphasizes import...

Page 15: ...rning indicates the presence of a hazard that can cause personal injury if precautions in the text are not observed CAUTION A caution indicates the presence of a hazard that might damage hardware corr...

Page 16: ...ion Guide EK HSG85 CG HSG60 HSG80 Array Controller ACS Version 8 n1 CLI Reference Guide EK HSG85 RG HSG60 HSG80 Array Controller ACS Version 8 n1 Maintenance and Service Guide EK HSG84 SV HSJ80 Array...

Page 17: ...x storage enclosures This chapter describes the enclosure and its major elements called customer replaceable units CRUs and various enclosure options Figure 1 1 illustrates a Model 2100 enclosure Figu...

Page 18: ...to support array controller operations One cache is required per array controller Each cache requires an external cache battery ECB ECB Four ECB bays are provided but the enclosure supports only two E...

Page 19: ...es for any empty enclosure element location to prevent a potential overtemperature condition Since only two ECB bays are used at any one time one per cache module install a blank in any vacant ECB bay...

Page 20: ...dentifies major element locations within the enclosure Figure 1 3 Major element mounting locations front and rear NOTE Model 2100 enclosures support only two I O modules whereas Model 2200 enclosures...

Page 21: ...quires an ECB module for each cache Refer to the array controller documentation for information about using controller sets and ECBs The following Compaq StorageWorks array controller types function p...

Page 22: ...ct the enclosure to the storage enclosures The following addresses are reserved for the array controllers SCSI bus ID 7 always used by Controller A initially assuming primary controller responsibiliti...

Page 23: ...the most effective and efficient method of ensuring continuous system operation and eliminates any one element as a single point of failure Power Monitoring Devices Important electrical aspects for co...

Page 24: ...maximum supported cable length is 3 m 9 8 ft Table 1 3 lists the available bus cables Table 1 2 Serial Port Pinout for Power Monitoring Connector Pin Signal Name Serial port connector Pins 10 9 8 7 6...

Page 25: ...ltra SCSI standard and hardware configuration rules In some instances operating system specific configuration rules might also apply General The following rules apply to the Ultra SCSI FAST 20 bus for...

Page 26: ...se as supported by the ACS version RAID Controllers The following general configuration rules apply to Compaq StorageWorks RAID array controllers Controller A is the primary controller and always uses...

Page 27: ...ng AC power to the enclosure completely configure the entire subsystem including the host and array controller cabling as described in the appropriate publications Fault Detection Fault detection invo...

Page 28: ......

Page 29: ...y EMU including product description configuration functionality and status indications Product Description The EMU monitors the enclosure status reports error conditions and controls some enclosure fu...

Page 30: ...isolation occurs without an EMU installed Functionality Table 3 1 lists functions monitored by the EMU Table 3 1 EMU Monitored Functions Element Function Monitored Rack Power faults Enclosure Intake...

Page 31: ...Table 3 2 1 EMU status LED 2 Power status LED 3 Enclosure fault LED 4 Alphanumeric display 5 Increment switch LED 6 Group switch LED Table 3 2 EMU Alarm Types Alarm Type Description Audible A high pi...

Page 32: ...e alarm turns off when the horn is muted Unmute Press and hold the group switch for approximately 2 seconds The group switch LED turns OFF and the audible alarm can sound when the horn is unmuted The...

Page 33: ...2 3 4 5 6 7 8 9 A b C d E F G H h i J L n o P r t U y and CAUTION Display of any character not listed above is an invalid display and indicates an EMU error condition The alphanumeric display present...

Page 34: ...pe that generated the error and its associated element number such as power supply number 2 0 3 Level 2 Element number two decimal characters and one period such as 02 Level 3 Error code two decimal c...

Page 35: ...atically reverts to its SCSI target ID default display Figure 3 4 illustrates how to navigate through the multilevel error code displays Appendix D contains detailed information pertaining to error co...

Page 36: ...esence of error conditions and one that indicates when Ho mode is disabled or the audible alarm is muted Three operating status LEDs see Figure 3 2 1 2 and 3 display the operating status of the EMU an...

Page 37: ...ation Product Description Enclosure I O modules are Ultra SCSI single ended I O modules and are located in the rear of the enclosure see Figure 4 1 Their functions include Terminating each external Ul...

Page 38: ...ure supports all six I O modules that interface with a storage enclosure using a VHDCI SCSI bus cable Figure 4 2 I O module and external connector view Figure 4 3 I O module bay and bus number correla...

Page 39: ...and status indications Product Description Each power supply converts an AC voltage into 5 VDC and 12 VDC power required for enclosure operations These DC voltages are distributed to enclosure element...

Page 40: ...Figure 5 2 Figure 5 2 180 W power supply bezel label One power supply supports all enclosure operations A second power supply provides power redundancy to eliminate the power supply as a single point...

Page 41: ...ly is operating normally If the power supply fails both LEDs turn OFF See Table 5 1 for a definition of selected power supply status LED displays and a description for each state 1 Shelf status LED 2...

Page 42: ......

Page 43: ...cription configuration and status indications Product Description To preserve write back cache data in the event of a power failure each cache module must be connected to an ECB ECBs are installed in...

Page 44: ...tion As shown in Figure 6 1 the enclosure has four ECB bays Each array controller and cache set within the enclosure requires an ECB ECB bays A1 and A2 see Figure 6 1 3 and 4 support Cache A ECB bays...

Page 45: ...turns ON to indicate a charging ECB battery This LED FLASHES during the ECB startup self test The amber ECB fault LED 3 turns ON to indicate a bad battery The ECB fault LED begins FLASHING if The ECB...

Page 46: ...SH rates are possible FLASH rate of once every second indicates that the either ECB battery is not properly plugged into the ECB circuit board or the battery temperature is out of limits FLASH rate of...

Page 47: ...This operating environment involves establishing and maintaining the correct ambient temperature Failure to maintain a proper operating environment might cause the elements to malfunction and comprom...

Page 48: ...e at high speed by default Otherwise the EMU directs the operating speed of the fans Fans are numbered from left to right Fan 1 Fan 2 and Fan 3 respectively as viewed from the front of the enclosure f...

Page 49: ...ch fan module contains status LEDs that indicate its current operating status see Figure 7 2 Figure 7 2 Fan status LEDs The green power status LED 1 turns ON when power is applied to the fan This LED...

Page 50: ...CSI Controller Enclosures User Guide See Table 7 1 for a definition of fan status LED displays Table 7 1 Fan Status LED Displays LED Display Status Description The fan is operating normally A fan faul...

Page 51: ...ectrostatic discharge ESD procedures that coincide with handling enclosure elements Element Replacement Methods Elements follow either a hot pluggable or a pluggable power on replacement method The de...

Page 52: ...ices on a grounded surface before removing them from their container Avoid touching the backplane connectors pins leads and exposed circuitry Follow proper grounding methods for handling static sensit...

Page 53: ...1 Table 8 4 and Table 8 5 Power Supply Hot pluggable redundant power supply configuration Table 8 6 and Table 8 7 ECB Battery Pack Power off only Table 8 8 ECB Array controller dependent Pluggable1 or...

Page 54: ...losures a blank panel covers the four vacant I O module bays A label affixed to each element identifies its replacement part number see Figure 8 2 1 Use this number to order a replacement element Also...

Page 55: ...an EMU Figure 8 3 EMU removal and installation Table 8 2 Removing an EMU 1 Press the release tab and pivot the lever 2 Remove the EMU from the enclosure Table 8 3 Installing an EMU 1 Press the release...

Page 56: ...upport only two I O modules SCSI bus 1 1 and SCSI bus 2 2 whereas Model 2200 enclosures support all six I O modules For Model 2100 enclosures a blank panel covers the four vacant I O module bays The I...

Page 57: ...ASH simultaneously indicating a quiesced bus 3 Disconnect the bus cable from the I O module being removed see Figure 8 4 4 Unscrew two mounting screws and remove the I O module from the enclosure Tabl...

Page 58: ...e the procedure in Table 8 7 to install a power supply CAUTION The enclosure requires power supplies rated for at least 180 W Figure 8 6 Power supply removal and installation Table 8 6 Removing a Powe...

Page 59: ...a Power Supply 1 Verify that the bezel displays this label 2 Insert the power supply until mounting tabs engage the enclosure and lock 3 Connect the power cord to the power supply 4 For hot pluggable...

Page 60: ...ially charged Determine battery freshness by this born on date label for example DC 03MAR99 means that the battery received its initial charge on March 3 1999 NOTE A fully discharged ECB battery pack...

Page 61: ...undle 3 Orient the replacement battery pack and wires as shown and fully insert the battery 4 Plug in the battery wire connector 1 5 Reposition the battery retaining bracket 2 and guide the battery wi...

Page 62: ...eplace the ECB using a vacant bay opening A or B that correlates with the defective ECB This method does not update ECB battery history data This procedure installs the replacement ECB and then remove...

Page 63: ...ep 3 for hot pluggable procedures 3 Press the release tab and pivot the lever downward on the replacement ECB 4 Remove the blank panel from the vacant bay A or B 5 Insert the ECB into the vacant bay u...

Page 64: ...CAUTION Operating the enclosure with one fan removed significantly alters the normal air flow pattern and reduces air flow through remaining elements Install a blank bezel to control air flow With tw...

Page 65: ...release tab and lower the lever 3 Remove the fan from the enclosure Table 8 12 Installing a Fan 1 Press the release tab and pivot the lever 2 Insert the fan until its lever engages the enclosure 3 Li...

Page 66: ...lled For dual redundant array controller configurations with FRUTIL support follow pluggable procedures otherwise follow power off procedures See Figure 8 10 for array controller and cache module loca...

Page 67: ...oller specific documentation use procedures in the array controller documentation Removing an Array Controller or Cache Module Table 8 13 provides the procedure for removing an array controller or cac...

Page 68: ...g the array controller cache module and cabling refer to array controller documentation NOTE After all enclosure elements are installed and power is applied to the enclosure refer to the array control...

Page 69: ...bear a label indicating its interference potential Electromagnetic Compatibility EMC Certification The equipment has been tested and found to comply with the limits for a Class A digital device pursu...

Page 70: ...ications NOTE The certification symbols on the label depend upon the certification level For example the FCC Class A certification symbol is not the same as the FCC Class B certification symbol shown...

Page 71: ...fines the physical electrical and environmental specifications for the Compaq StorageWorks Model 2100 and 2200 Ultra SCSI controller enclosures shown in Figure B 1 and Figure B 2 respectively Figure B...

Page 72: ...lectrical Specifications Table B 1 provides enclosure physical specifications CXO6321D CXO6322C Table B 1 Physical Specifications Item Height Width Depth Weight Enclosure 150 mm 5 9 in 445 mm 17 5 in...

Page 73: ...lb 1 Full compliment of elements includes two array controllers and two cache modules 2 ECB weight with battery pack installed Table B 2 Electrical Specifications Item Specification Input voltage 100...

Page 74: ...tude 0 5 C per 300 m to 3000 m 1 F per 1000 ft to 10 000 ft Relative humidity 10 to 90 at a maximum wet bulb temperature of 28 C 82 F Air quality No to exceed a maximum of 500 000 particles 0 5 micron...

Page 75: ...ersonal injury Always mount an empty enclosure into a rack prior to installing enclosure devices Use two people to lift align and insert the enclosure into a rack This appendix identifies the recommen...

Page 76: ...this document and continue with the assembly instructions contained in the following sections Installing Enclosure Front Elements Four types of elements are installed in the enclosure front the EMU EC...

Page 77: ...icable using Table 8 14 Connecting Ultra SCSI Bus Cables and Host Cabling Ultra SCSI bus cables connect the enclosure to as many as six storage enclosures Host cabling connects the enclosure to a host...

Page 78: ...s ON when AC source power is applied to the enclosure NOTE Before applying AC power to the enclosure completely configure the entire subsystem including the host and array controller cabling as descri...

Page 79: ...ing the ID address and error codes The default SCSI target ID id address is disabled CRU types range from 00 through 07 Two decimal points are used one after each character Error codes range from 01 t...

Page 80: ...display The audible alarm sounds a 2 second steady tone and then three to five beeps The EMU resets 00 is displayed on the alphanumeric display after the EMU resumes normal operations Nonfatal Error...

Page 81: ...s all errors The GUI does not display fatal errors This alarm establishes the following conditions Maintains highest precedence over all other alarms Sounds the unrecoverable alarm tone constant tone...

Page 82: ...an prevent this condition from escalating to a critical condition This alarm establishes the following conditions Unrecoverable and critical alarms take precedence over this alarm Maintains precedence...

Page 83: ...f the various alarm tones become annoying after a few minutes Table D 1 distinguishes the normal alarm tones and the remind tones To avoid this annoyance either disable or mute the horn If disabled no...

Page 84: ...multiple errors or a recurring error the code is displayed The complete alarm report is stored and can be recalled using a combination of the increment and the group switches Error Code Format The al...

Page 85: ...this value is identified within the problem definition corrective action for each error code Table D 3 Error Code List Error Code Problem Definition Corrective Action 0 2 01 Noncritical Two error poss...

Page 86: ...Check for an empty bay or for a high operating environment ambient air temperature Fill any open bay with the required element or blank bezel Reduce the operating environment ambient air temperature...

Page 87: ...pates the heat generated by the device Also referred to as the intake air temperature array controller A stand alone device that connects a host adapter to the storage SCSI bus This device provides RA...

Page 88: ...d on electronic devices that are for use in a commercial environment A CE Mark certified device can also be used in the United States channel Another term for a SCSI bus See also SCSI bus CRU Customer...

Page 89: ...enables the audible alarm horn See also Ho environmental monitoring unit See EMU ESD Electrostatic discharge The discharge of a potentially harmful static electric voltage as a result of improper gro...

Page 90: ...stem I O bus for example a PCI bus to the storage SCSI bus A host adapter performs the lower layers of the SCSI protocol and normally operates in the initiator role host computer See host host control...

Page 91: ...e maintenance terminal to configure a storage subsystem MB s Megabytes per second The per second byte transfer rate with a binary multiplier of 1 024 000 The bus width 8 or 16 bit the number of bytes...

Page 92: ...C to StorageWorks enclosures These supplies can be either AC input 120 VAC or DC input 48 VDC quiescing To make a bus inactive still quiet or dormant rack Another term for cabinet A means for storing...

Page 93: ...inators The terminators ensure that inactive SCSI bus signals are in a known state There are two basic types of terminators active and passive Single ended bus segments use active linear terminators D...

Page 94: ...d power supply that provides backup AC power whenever the primary AC power is lost How long backup power is provided depends upon the UPS size and the equipment supported very high density computer in...

Page 95: ...alarm See also alarm B blank panels 1 3 8 17 bus addressing 2 2 bus transfer rate 2 1 C cabinet installation See rack installation cables connecting to a host 1 5 Ultra SCSI bus 1 8 C 3 cache module...

Page 96: ...to 3 8 alarm types 3 3 alarm types table 3 3 bezel switches and status LEDs illustrated 3 3 bezel switches LEDs and alphanumeric display 3 3 functions 3 2 installing 8 5 LEDs 3 8 location illustrated...

Page 97: ...changing the horn mode setting 3 5 communication port location 1 6 ECB bay locations 6 1 8 12 status LEDs 6 3 ECB removal and installation 8 13 element mounting locations 8 4 EMU bezel switches and st...

Page 98: ...Model 2100 to a Model 2200 enclosure 1 7 overtemperature condition 8 14 overtemperature condition fan response 7 2 P physical specifications B 2 physical specifications table B 2 pluggable elements ar...

Page 99: ...D displays 6 4 electrical specifications B 3 element ID numbers D 6 element replacement methods and procedures 8 3 EMU alarm types 3 3 EMU monitored functions 3 2 enclosure UPS specifications B 3 erro...

Page 100: ...uninterruptable power supply See UPS upgrading from a Model 2100 to a Model 2200 enclosure 1 7 UPS support minimum battery life for clearing cache B 3 power requirement B 3 UPS planning B 3 V very hi...

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