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 2040 User Manual

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

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.
Table 14

Diagnostics LED status: Rear panel "Cache Status"

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 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:
can complicate the troubleshooting process.

Host-side connection troubleshooting featuring host ports with SFPs

The procedure below applies to MSA 2040 SAN controller enclosures employing small form factor
pluggable (SFP) transceiver connectors in 4/8/16 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.
1. Halt all I/O to the storage system as described in
2. Check the host link status/link activity LED.
If there is activity, halt all applications that access the storage system.
60 Troubleshooting
"Cache Status LED details" (page
Do not perform more than one step at a time. Changing more than one variable at a time
Actions
If valid data is thought to be in Flash, see
otherwise, 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.
86).
"Stopping I/O" (page
Transporting cache;
55).