MSA1000 error #259

[Xavi.e.r]

We had a power outage which caused the SAN to power off. After that I cannot get rid of this message in the ACU (screen capture attached).

#259 The current arrary controller had an unexpected arrary accelerator battery voltage drop which may have resulted in a corrupted data in its cache.

Any suggestions?

[IBaltay]

Hi,
is it working with the write cache disabled and hence the performance is degraded pls?

[Xavi.e.r]

As long as I know from the ACU cache is enabled (see attached file). But when I CLI to the controller the Active controller (I have 2 controllers) shows:
Batteries are disabled
Module #1 is fully charged and turned off
Module #2 is fully charged and turned off

Why does it say that if the ACU says is enabled?
How do I turn them on?

[IBaltay]

do you have 512MB of cache and it is proportionaly used for reads and writes?

(can be checked via the
show globals command

[Xavi.e.r]

Correct 512 KB and proportional, see below

Global Parameters:
System Name: SGA075201L
Rebuild Priority: high
Expand Priority: high
Surface Delay: 3.0 seconds

Total Cache: 512MB
50% Read Cache: 256MB
50% Write Cache: 256MB

Temperature:
No temperature sensor support.
FIBRE BAY: 44 Celsius, 111 Fahrenheit

[IBaltay]

but this
Total Cache: 512MB
50% Read Cache: 256MB
50% Write Cache: 256MB

means that there seems no problem with batteries, because the the controller cache moudule is temporarily disabled e.g. when the controller is powered on, if they are discharged the internal circuitry automaticaly recharges them. The controller functions properly at that time, although withoout the performance advantage of the controller cache module. When the batteries are charged to 90 percent of their capacity, the controller cache module is automaticaly enabled.

Now in your situation there seems are 2 information which seems to be contradictory:
a) that during the power off there was a drop in the cache battery, therefore it could be that the data in cache are corrupted and
b) that there is no unflushed data in cache

Resume

Run the ADU (array diagnostic utility) check it and send it also to HP support with the issue description for the possible root cause analysis to come onsite and e.g. reinsert/replace the batteries