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Write Latency with P212

Brandon Lemoine
Occasional Visitor

Write Latency with P212

We have a new server with a P212 controller 256 cache. This server maintains a write latency of around 28ms, real is around 3ms, even if the servers VM is not doing anything. This server is currently running one VM. We had issues with the server running at all, so we upgraded the firmware on the controller, 2.5 or whatever is the latest version. This helped with just getting it to work but again seems like this is our of the norm, very slow.

Setup:
ESX 4.1.0,260247
HP DL180 G6, (1) 2.66GHz L5520 with 8GB RAM.
Smart Array P212 (Part # 462834-B21) with 2-15K drivers, RAID 1

We have another server with a P410 running 4 VM's with no issues.

Thank you,
4 REPLIES
Brandon Lemoine
Occasional Visitor

Re: Write Latency with P212

I even paused the VM and the Write Latency is at 27 and the Read is at 3 constantly. I verified this with ESXTOP (D) G & DAVG/cmd is around 30. With (V) nothing as the VM is not running.

indus
HPE Pro

Re: Write Latency with P212

try updating the ESX 4.1 to build no.: 348481 (update 1) also upgrade the firmware of BIOS on the server and monitor
I work for HP
A quick resolution to technical issues for your HP Enterprise products is just a click away HP Support Center Knowledge-base
See Self Help Post for more details

Brandon Lemoine
Occasional Visitor

Re: Write Latency with P212

Yea, did that no luck. Called HP, they are sending a new controller. I hope that helps. I will keep updating.
Brandon Lemoine
Occasional Visitor

Re: Write Latency with P212

This was an off site server. After going on-site it seems the controller cache might have been disabled. We change the controller and cache along with verifying the setup.