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March 2nd, 2012 06:00

PerfMon Counters

Hi All,

 

We have MD3000 with multiple RAIDs.  The storage is used for SQL Server databases. When gathering metrix like % Disk Time and Avg. Queue Length, we are encountering some weird values.  After running for a week to capture the counters, we see something like this:

Average of % Disk Time on a RAID of 6 disks is 1346% with Avg. Disk Queue Lenght exactly 1/100th of the % Disk Time (13.46)

Can make sense of these numbers.  Even if we divide 1346/6 spindles, it's   224%!  How is this possible?

 

Thanks.

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