IBM DS4700 manual Powering off the storage subsystem, Storage Manager

display numbers. The diagnostic LED tuns off when the numeric display shows the storage subsystem enclosure ID. The numeric display shows various diagnostic codes as the enclosures perform the startup process after each power cycle or reset. After diagnostics are complete, the current storage subsystem enclosure ID is displayed.

Diagnostic codes in the form of Lx or Hx, where x is a hexadecimal digit, indicate storage subsystem state information. In general, these codes are displayed only when the storage subsystem is in a non-operational state. The storage subsystem might be non-operational due to a configuration problem (such as mismatched types), or it might be non-operational due to hardware faults. If the storage subsystem is non-operational due to system configuration, the storage subsystem Needs Attention LED is off. If the storage subsystem is non-operational due to a hardware fault, the storage subsystem Needs Attention LED is on. The definitions for Lx diagnostic codes are listed in Table 46.

Table 46. Numeric display diagnostic codes

			Storage Manager
Value	Controller State	Description	View
L0	Suspend	Mismatched controller	Needs Attention
		board ID	condition for board ID
			mismatch
L2	Suspend	Persistent memory	Needs Attention
		errors	condition for offline
			controller
L3	Suspend	Persistent hardware	Needs Attention
		errors	condition for offline
			controller
L5	Offline	The alternate	Needs Attention
		controller has	condition for offline
		incompatible firmware	controller
		but automatic
		controller firmware
		synchronization (ACS)
		cannot be performed
L7	Suspend/Offline	Controller with	Needs Attention for
		different controller	offline controller
		submodel ID inserted.
		A DS4200 Express
		controller is inserted
		in a DS4700 Express
		Storage Subsystem.
L8	Offline	Unsupported memory	Need Attention
		is present or memory	because the controller
		is not populated in	is in offline/failed state
		the correct memory
		slots
88	Reset	Controller is held in	Needs Attention
		reset by the other	condition for offline
		controllers	controller

Powering off the storage subsystem

The DS4700 Express is designed to run continuously. After you turn it on, do not turn it off. Turn off the power only in the following situations:

Chapter 4. Operating the storage subsystem 133