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SQL Server 2005
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Logical Drive
Logical Drive
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sudhakara
sudhakara
Posted Wednesday, July 15, 2009 1:55 PM
Mr or Mrs. 500
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Last Login: 2 days ago @ 12:18 PM
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Hi...
Can you explain about how logical drives helps to improve the performances of server and how it works ?
what are the benefits of making the logical drives ?
Thanks in Advance...
Post #753793
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Wednesday, July 15, 2009 2:14 PM
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There is no benefit. A logical drive is an administrative item in Windows.
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Post #753807
sudhakara
sudhakara
Posted Wednesday, July 15, 2009 2:20 PM
Mr or Mrs. 500
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Last Login: 2 days ago @ 12:18 PM
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Steve Jones - Editor (7/15/2009)
There is no benefit. A logical drive is an administrative item in Windows.
thks for your reply ...is it work in the same as well in the SAN ?
Post #753816
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Wednesday, July 15, 2009 2:28 PM
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A logical drive is a partition of a physical drive. It can be a complete partition of a drive or a partial partition.
A physical drive is where you determine performance. A single physical drive offers no protection and doesn't perform as well as a RAID drive (usually).
A SAN typically bundles physical drives into arrays that can have a logical drive presented to Windows.
I'm not sure what you mean by "works the same". A SAN is a much more complicated I/O subsystem.
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Post #753824
sudhakara
sudhakara
Posted Wednesday, July 15, 2009 2:45 PM
Mr or Mrs. 500
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Last Login: 2 days ago @ 12:18 PM
Points: 588,
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Steve Jones - Editor (7/15/2009)
A logical drive is a partition of a physical drive. It can be a complete partition of a drive or a partial partition.
A physical drive is where you determine performance. A single physical drive offers no protection and doesn't perform as well as a RAID drive (usually).
A SAN typically bundles physical drives into arrays that can have a logical drive presented to Windows.
I'm not sure what you mean by "works the same". A SAN is a much more complicated I/O subsystem.
thks for your info...
will it improve the performance by spliting the physical drive into many logical drive in SAN or not ?
Post #753829
Steve Jones - SSC Editor
Steve Jones - SSC Editor
Posted Wednesday, July 15, 2009 2:54 PM
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Last Login: Yesterday @ 1:47 PM
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First physical drives matter. If you have 20 logical drives on the SAN that all are built on the same physical drives, you aren't helping.
You have to clarify what you mean by physical drives. Are these drives located inside the server machine? Typically these are DASD (direct attached storage device) as opposed to SAN, which is a network device.
If you can get your data onto more physical drives, usually in a series of R1 or R10 arrays, performance often improves, but you should have some metrics that show what performance is now, and how a new configuration might imrpove that.
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Post #753839
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