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01-17-2008, 05:04 PM

Mike Ruskai

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Subject: Regarding RAID5 with MegaRAID
Lines: 16
Date: Fri, 12 Dec 2003 22:49:34 GMT
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Xref: intern1.nntp.aus1.giganews.com comp.os.linux.setup:450997

In case anyone is curious, I found that using five drives instead of six
(making the sixth a hot spare) produces greatly improved performance.

With write back caching and cached I/O enabled, I get a write speed of
about 75MB/sec (as measured by how long it took to copy a 1.7GB file that
was in the read buffer of another drive already), and a read speed of over
150MB/sec (as measured by unmounting and remounting to the file system to
clear buffers, then reading it with a quick program made for the task).

--
- Mike

Remove 'spambegone.net' and reverse to send e-mail.

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