Re: RX2800 sporadic disk I/O slowdowns

On 10/18/24 5:09 PM, Craig A. Berry wrote:

 On 10/18/24 1:26 PM, Richard Jordan wrote:

Monitor during a long run shows average and peak I/O rates to the disks with busy files at about 1/2 of what they do for normal runs.

 That is exactly what happens when the cache battery on a RAID controller
dies.  Maybe yours is half-dead and sometimes takes a charge and
sometimes doesn't?  MSA$UTIL should show the status of your P410.

Initial check shows all good on the controller.  No disk, battery, cache, etc issues.  I may add snapshotting the controller status via MSA$UTIL to one of the other polling jobs in case battery or cache status is varying.
The long-run occurred again, another Monday in a row. I haven't had time to review our diagnostic polling yet to see if any different jobs or user stuff was running concurrently but will shortly.
I'll take a look at T4; its been more than a decade since we tried using it on a customer system.
Thanks