If The Controller Has Failed Or Does Not Start, Is The Cache Status Led On/Blinking; Transporting Cache; Isolating A Host-Side Connection Fault; Host-Side Connection Troubleshooting Featuring Host Ports With Sfps - HP MSA 2050 User Manual

If the controller has failed or does not start, is the Cache Status LED on/blinking?

Table 16 Diagnostics LED status: Rear panel "Cache Status"
Answer
No, the Cache LED status is off, and the controller
does not boot.
No, the Cache Status LED is off, and the controller
boots.
Yes, at a strobe 1:10 rate - 1 Hz, and the controller does
not boot.
Yes, at a strobe 1:10 rate - 1 Hz, and the controller
boots.
Yes, at a blink 1:1 rate - 1 Hz, and the controller does
not boot.
Yes, at a blink 1:1 rate - 1 Hz, and the controller boots.
NOTE: See also

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 HPE 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 2050 SAN controller enclosures employing small form factor pluggable (SFP)
transceiver connectors in 8/16 Gb FC, 10GbE iSCSI, or 1 Gb iSCSI 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.
"Cache Status LED details" (page
Actions
If valid data is thought to be in Flash, see
replace the controller module.
The system has flushed data to disks. If the problem persists, replace the
controller module.
See Transporting cache.
The system is flushing data to CompactFlash. If the problem persists,
replace the controller module.
See Transporting cache.
The system is in self-refresh mode. If the problem persists, replace the
controller module.
69).
Transporting cache; otherwise,
Isolating a host-side connection fault 51