On Sun, 23 Mar 2008, Ralph Angenendt wrote:
Kieran Clancy wrote:
When I do tests though, I find that the md raid1 read performance is
no better than either of the two disks on their own
Why should RAID1 be faster than writing to/reading from a single disc?
You are *mirroring* each write to another disk, so I'd even expect it to
be slower.
Read performance would be better if there are multiple accessors, but not
for just a single stream. The hdparm test is not good in this case; Kieran
sees exactly what is suspected. Try running it twice (at the same time).
Steve
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Steve Thompson E-mail: smt AT vgersoft DOT com
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"186,300 miles per second: it's not just a good idea, it's the law"
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