IBM DS4700 manual Parts listing

Table 51. Symptom-to-FRU index (continued)

Problem
indicator	Component	Possible cause	Possible solutions
Hard disk drive	Several CRUs	Drive or drives	Replace failed drive or drives.
not visible in RAID		failed
management
		FC cable failed	Replace FC cable.
software
		SFP failed	Replace SFP.
		RAID controller	Replace RAID controller.
		failure
		Midplane failure	Have the midplane replaced.
			Contact an IBM technical support
			representative.
		Drive CRU has	Replace the drive CRU.
		interface problem
		with the ESM or
		controller.
		Incorrect firmware	Verify that the DS4700 Express
		version	Storage Subsystem has the
			correct firmware version. Refer to
			“Software and hardware
			compatibility and upgrades” on
			page 20.
		A controller has	Replace the failed controller and
		failed in addition to	ESM.
		the ESM failure in
		the drive channel
		that originates from
		the functioning
		controller.

Parts listing

Figure 120 on page 189 and the following table provide a parts listing for the

DS4700 Express.

188IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide