Bob
Guest
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 Posted:
Sun Sep 26, 2004 2:00 am Post subject:
RAID-5 advice |
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I am adding 3 15,000 rpm 36 GB SCSI drives to a RAID
array that already contains 3 10,000 rpm 18 GB drives.
As a result I will have one RAID-5 partition spread over
6 drives (half 10,000 rpm and half 15,000 rpm) and
another RAID-5 partition contained only on the 15,000 rpm
drives.
Which partition should perform better...the one spread
over 6 drives or the one that is strictly on 15,000 rpm
drives? The workload is SQL Server, Exchange Server, and
general file sharing.
Bob |
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Pat [MSFT]
Guest
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| Posted:
Mon Sep 27, 2004 9:16 am Post subject:
Re: RAID-5 advice |
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It's all in the seek time. SQL & Exchange will likely respond better to a
partition made up entirely of 15k drives (they tend to seek a lot). Though
it is unlikely that you would notice a difference unless you are already IO
bound.
It is unlikely that your file/print activities would be affected (users
don't tend to drive IO like applications do).
Pat
"Bob" <anonymous@discussions.microsoft.com> wrote in message
news:2cb201c4a34b$0d6ba690$a401280a@phx.gbl...
| Quote: | I am adding 3 15,000 rpm 36 GB SCSI drives to a RAID
array that already contains 3 10,000 rpm 18 GB drives.
As a result I will have one RAID-5 partition spread over
6 drives (half 10,000 rpm and half 15,000 rpm) and
another RAID-5 partition contained only on the 15,000 rpm
drives.
Which partition should perform better...the one spread
over 6 drives or the one that is strictly on 15,000 rpm
drives? The workload is SQL Server, Exchange Server, and
general file sharing.
Bob |
|
|
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