Hi guys, We have a PE1950III with a PERC6 and two 15k 74Gb disks in RAID 1. This server runs a telephony app that is pretty verbose and hits the disk pretty hard (5Mb/s sustained). During the battery learn-cycle the performance drops, and the load on the server goes through the roof, until the controller is satisfied that the battery is ok. In the logs we see that the controller sets the cache to write-through for this operation. This is a pretty sensible thing to do, but it usually happens late at night, and our duty tech gets woken up because it triggers our monitoring system. Going through the OMSA documentation, we found that we could set the cache to "Force Write-Back" with omconfig omconfig storage vdisk action=changepolicy writepolicy=fwb controller=0 vdisk=0 (untested command) Would enabling this over an extended period be bad, or would it be better to enable it before the learn-cycle and disable it right after it's done ? Thanks for any hints, Robert von Bismarck Senior Systems Engineer
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