HP MSA 1040 SAN Storage - Manual (Page 52)

52 Troubleshooting
If the controller has failed or does not start, is the Cache Status LED on/blinking?
NOTE: See also "Cache Status LED details" (page 73) .
Transporting cache
To preserve the existing data stored in the CompactFlash, you must transport the CompactFlash from the
failed controller to a replacement controller using the procedure outlined in HP MSA Controller Module
Replacement Instructions shipped with the replacement controller module. Failure to use this procedure will
result in the loss of data stored in the cache module.
CAUTION: Remove the controller module only after the copy process is complete, which is indicated by
the Cache Status LED being off, or blinking at 1:10 rate.
Isolating a host-side connection fault
During normal operation, when a controller module host port is connected to a data host, the port’s host
link status/link activity LED is green. If there is I/O activity, the LED blinks green. If data hosts are having
trouble accessing the storage system, and you cannot locate a specific fault or cannot access the event
logs, use the following procedure. This procedure requires scheduled downtime.
IMPORTANT: Do not perform more than one step at a time. Changing more than one variable at a time
can complicate the troubleshooting process.
Host-side connection troubleshooting featuring host ports with SFPs
The procedure below applies to MSA 1040 controller enclosures employing small form factor pluggable
(SFP) transceiver connectors (4/8 Gb FC, 10GbE iSCSI, or 1 Gb iSCSI) in host interface ports. In the
following procedure, “SFP and host cable” is used to refer to any of the qualified SFP options supporting
Converged Network Controller ports used for I/O or replication.
NOTE: When experiencing difficulty diagnosing performance problems, consider swapping out one SFP
at a time to see if performance improves.
Answer Actions
No, the Cache LED status is off, and the
controller does not boot.
If valid data is thought to be in Flash, see Transporting cache ;
otherwise, replace the controller module.
No, the Cache Status LED is off, and the
controller boots.
The system has flushed data to disks. If the problem persists,
replace the controller module.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller does not boot.
See Transporting cache .
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller boots.
The system is flushing data to CompactFlash. If the problem
persists, replace the controller module.
Yes, at a blink 1:1 rate - 1 Hz, and the controller
does not boot.
See Transporting cache .
Yes, at a blink 1:1 rate - 1 Hz, and the controller
boots.
The system is in self-refresh mode. If the problem persists, replace
the controller module.
Table 14 Diagnostics LED status: Rear panel “Cache Status”