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P812 Array Accellerator disabled

 
Craggy
Occasional Advisor

P812 Array Accellerator disabled

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.

4 REPLIES

Re: P812 Array Accellerator disabled

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

 

I would think this is the problem.

Craggy
Occasional Advisor

Re: P812 Array Accellerator disabled

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

>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?

Craggy
Occasional Advisor

Re: P812 Array Accellerator disabled

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