Use Table 7 to find solutions for storage unit problems with definite
symptoms.
Table 7. Model EXP problems and suggested actions
| Problem indicator | Component | Possible cause | Suggested Actions |
|---|---|---|---|
| Amber LED is on | Hard drive | Drive failure | Replace the failed drive. Refer to IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. |
| ESM board | Board failure | Replace failed board. Refer to IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. | |
| Front panel | General machine fault; a Fault LED somewhere on the storage unit has been switched on | Check for amber LEDs. Refer to IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. | |
| Amber LED is on and green LED is off | Power supply | Power is switched off | Switch on all power supplies. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. |
| Amber and green LEDs are on | Power supply | Power supply failure | Replace the failed power supply. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. |
| All green LEDs are off |
| The storage unit is switched off | Check that all storage unit power cables are plugged in and the power is
on. If applicable, check that the main circuit breakers for the rack
are switched on.
If the external switch 1 is set to Off, the SCSI controller must be cabled to the storage unit and switched on. |
| AC power failure | Check the main circuit breaker and ac outlet. | ||
| Power supply failed | Replace the power supply. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. | ||
| Midplane failure | Service the storage unit. | ||
| Amber LED is flashing | Hard drive | Drive rebuild or identity is in process | No corrective action is needed. |
| Power supply | Fan failure | Replace the power supply. | |
| Amber LED is on and green DC power LED is off | Power supply | Power supply failure | If the power switch is ON, replace the power supply. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. |
| Amber LED is on and green AC Power LED is off | Power supply | No ac power to power supply. Check the ac power cord (cable) or breaker | If ac power is good at the source, replace the power cord. If the power supply has failed, replace the power supply. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. |
| Green LED is on | Drive ID=6 | Cluster configuration | If the storage unit is not currently cluster configured, power cycle it to reenable ID=6. |
| One or more green LEDs are off | One or two drives | No activity to the drives | No action is required. |
| All drives or those on one bus | No activity to the drives | No action is required. | |
| Damaged or loose SCSI cables | Check SCSI-bus cables and connections. | ||
| ESM board failure | Use RAID management code to check the SCSI-bus status. Replace the ESM board. See IBM TotalStorage IP Storage 200i Storage Unit Installation Guide. | ||
| Midplane failure | Service the storage unit. | ||
| Front panel | Power supply | Make sure the cables are plugged in and power supplies are switched on. | |
| Hardware failure | If any other LEDs are on, service the storage unit. | ||
| Intermittent or sporadic power loss to the storage unit |
| Defective ac power source or partially plugged power cable | Check the ac power source. Resecure all installed power cables and power supplies. If applicable, check the power components (power units, UPS, and so on). Replace defective power cables. |
| Power supply failure | Check for a fault LED on the power supply and replace the failed power supply. | ||
| Midplane failure | Service the storage unit. | ||
| Unable to access drives on one or both SCSI buses | Drives and SCSI bus | Incorrect SCSI ID settings. | Make sure SCSI cables are undamaged and properly connected. Check
the drive SCSI ID settings. Ensure that option switches 1 and 3 (inside
the switch card) are set to the appropriate positions.
Attention: Change switch positions only when your host server and storage unit are switched off. |
| ESM board failure | Service the storage unit. | ||
| Bridge card | Bridge card failure | All high address or all low address hard-disk drive failed; check the bridge card and replace it if necessary. | |
| Random errors | Subsystem | Midplane failure | Service the storage unit. |
| Note: | If you cannot find the problem in the troubleshooting table, test the entire
system. See your appliance documentation for more detailed information
on testing and diagnostic tools.
If you already have run the server test program, or if running the test does not reveal the problem, have the system serviced. |