topic P812 Array Accellerator disabled in ProLiant Servers (ML,DL,SL)

P812 Array Accellerator disabled

Craggy — Thu, 17 Sep 2015 14:11:07 GMT

We have a P812 controller in an Se326M1 (DL180 G6) and the array accelerator is disabled.

Output from the CLI is this:

   Cache Board Present: True
   Cache Status: Permanently Disabled
   Cache Status Details: Cache disabled; backup to flash memory failed
   Accelerator Ratio: 50% Read / 50% Write
   Drive Write Cache: Enabled
   Total Cache Size: 1024 MB
   Total Cache Memory Available: 912 MB
   No-Battery Write Cache: Enabled
   Cache Backup Power Source: Capacitors
   Battery/Capacitor Count: 1
   Battery/Capacitor Status: OK

Is there any way to re-enable the cache without rebooting this server? It is running critical storage for VMs.

Re: P812 Array Accellerator disabled

Dennis Handly — Fri, 18 Sep 2015 06:33:34 GMT

>Cache Status Details: Cache disabled; backup to flash memory failed

I would think this is the problem.

Re: P812 Array Accellerator disabled

Craggy — Fri, 18 Sep 2015 09:46:29 GMT

Yeah we have already replaced the 1GB cache module and assumed the array accellerator would be enabled automatically.

After a few days we noticed the performance of the VMs was still terrible so we checked the acucli and saw the cache is still disabled.

We were hoping there is a way to force enable the cache again from the cli because scheduling another reboot and maintenance window is not ideal.

Re: P812 Array Accellerator disabled

Dennis Handly — Fri, 18 Sep 2015 21:05:41 GMT

>we have already replaced the 1GB cache module

Hmm, if you replaced it, why does it still say failed?

Did that module also contain the flash?

Re: P812 Array Accellerator disabled

Craggy — Sat, 19 Sep 2015 07:42:10 GMT

Yep we replaced both the flash cache module and capacitor pack.