Parts Listing - IBM DS3950 User And Installation Manual

Table 21. Symptom-to-FRU index (continued)
Problem indicator Component
Unable to access
drives
Random errors
Hard disk drive
not visible in
RAID
management
software

Parts listing

Figure 41 on page 101 and the following table provide a parts listing for the
EXP395.
100
IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User's, and Maintenance Guide
Possible cause
Drives and Incorrect storage
fibre-channel expansion enclosure
loop ID settings
ESM failure
Drive or drives
failed
Drive is not
certified
Subsystem Midplane failure
Several FRUs Drive or drives
failed
FC cable failed
SFP failed
ESM failure
Midplane failure
Incorrect firmware
version
Possible solutions
Ensure that the fibre-channel
optical cables are undamaged
and properly connected. Check
the storage expansion enclosure
ID settings.
Note: For information on how to
change the storage expansion
enclosure ID if required, refer to
the online Help in the DS
Storage Manager GUI.
Replace one or both ESMs.
Contact an IBM technical support
representative.
Replace failed drive or drives.
Check the DS3950 product Web
site for the correct drive option
P/N or FRU P/N certified for
your DS3950 storage subsystem.
Have the midplane replaced.
Contact an IBM technical support
representative.
Replace failed drive or drives.
Replace FC cable.
Replace SFP.
Replace ESM.
Have the midplane replaced.
Contact an IBM technical support
representative.
Verify that the DS3950 storage
subsystem has been upgraded to
the correct firmware version.
Refer to "Firmware updates" on
page 49.