% Disk Time

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% Disk Time

Whisper9999

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June 26, 2007 at 12:23 pm

#179456

The c drive on one of my servers has a Perf Mon Counter (
\%DiskTime">\\\%">Servername\LogicalDisk(C\%DiskTime
that shows > 100%. How can this be?

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Lynn Pettis SSC Guru Points: 442467 More actions · Answer 1

Lynn Pettis

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Points: 442467

June 26, 2007 at 1:26 pm

#715326

Is the C drive mirrored?

Whisper9999 Hall of Fame Points: 3012 More actions · Answer 2

Whisper9999

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June 26, 2007 at 5:57 pm

#715379

Yes.

Lynn Pettis SSC Guru Points: 442467 More actions · Answer 3

Lynn Pettis

SSC Guru

Points: 442467

June 26, 2007 at 6:21 pm

#715383

That's why.

Whisper9999 Hall of Fame Points: 3012 More actions · Answer 4

Makes sense. So, in general, you have to take the %DiskTime and divide by two then (if it's mirrored)?

Also, here are some values from midnight a few nights ago:

379
433
454
555
588
835
437
476
1,096
749
527
429
694
152

These shouldn't be above 200%, should they?

Lynn Pettis SSC Guru Points: 442467 More actions · Answer 5

That I can't really answer. I know enough about hardware to support my computers at home and get in trouble at work, but if the disk is mirrored, I would assume the numbers wouldn't exceed 200%.

Robert-377973 SSC Enthusiast Points: 172 More actions · Answer 6

I believe this will answer your question:

http://support.microsoft.com/kb/310067

Whisper9999 Hall of Fame Points: 3012 More actions · Answer 7

Whisper9999

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Points: 3012

June 27, 2007 at 10:41 am

#715591

Thx!