IBM Medium J11 - Page 4

SAS cable connections.............................................................................................................................. 43
Chapter 5. Operation........................................................................................... 45
Powering on/powering off......................................................................................................................... 45
Unit Identication Number........................................................................................................................46
Chapter 6. Troubleshooting and problem solving.................................................. 47
Overview.....................................................................................................................................................47
Initial start-up problems........................................................................................................................... 47
LEDs............................................................................................................................................................47
Temperature sensors.................................................................................................................................49
Enclosure system.......................................................................................................................................49
PSU and system fan faults.........................................................................................................................50
Fault isolation methodology...................................................................................................................... 52
Host I/O......................................................................................................................................................52
Dealing with hardware faults.....................................................................................................................53
Continuous operation during replacement............................................................................................... 53
Firmware.................................................................................................................................................... 53
CRUs for IBM COS Medium / Large Disk Enclosure.................................................................................. 53
Chapter 7. Module removal and installation..........................................................55
Overview.....................................................................................................................................................55
ESD precautions.........................................................................................................................................55
Replacing a PSU module............................................................................................................................56
Removing a PSU module...................................................................................................................... 56
Installing a PSU module.......................................................................................................................58
Replacing a system fan module................................................................................................................ 58
Removing a system fan module...........................................................................................................58
Installing a system fan module............................................................................................................59
Replacing a controller fan module............................................................................................................ 60
Removing a controller fan module.......................................................................................................60
Installing a controller fan module........................................................................................................61
Replacing an HS Expander module........................................................................................................... 62
Removing an HS Expander module..................................................................................................... 62
Installing an HS Expander module...................................................................................................... 63
Replacing a drive carrier module...............................................................................................................63
Removing a drive carrier module......................................................................................................... 64
Installing a drive carrier module..........................................................................................................65
Replacing an IOM.......................................................................................................................................66
Removing the IOM................................................................................................................................67
Installing the IOM.................................................................................................................................68
Verifying component operation................................................................................................................. 69
Chapter 8. Technical specications...................................................................... 71
Chapter 9. Enclosure packaging........................................................................... 75
Notices................................................................................................................79
Trademarks................................................................................................................................................ 80
Homologation statement...........................................................................................................................81
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