hi all
I just setup this test box on OI. It has a couple of X25Ms, 80GB and eight 2TB
drives, two of them Hitachi Deskstar 7k2 drives and the other six WD Green. I
have done some tests on this with mirrors to compare the performance and those
tests conclude that the Hitachi drives are 25% or so faster. Now, installing a
Bacula storage agent on the OI box, I see from iostat -xd that it looks like
the WD Green drives are running in circles around the Deskstar drives. I really
can't beleive why. Anyone here that has an idea of why this should be happening?
See below for iostat output.
2 second snap
extended device statistics
device r/s w/s kr/s kw/s wait actv svc_t %w %b
cmdk0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
cmdk1 0.0 163.6 0.0 20603.7 1.6 0.5 12.9 24 24
fd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 0.5 140.3 0.3 2426.3 0.0 1.0 7.2 0 14
sd2 0.0 138.3 0.0 2476.3 0.0 1.5 10.6 0 18
sd3 0.0 303.9 0.0 2633.8 0.0 0.4 1.3 0 7
sd4 0.5 306.9 0.3 2555.8 0.0 0.4 1.2 0 7
sd5 1.0 308.5 0.5 2579.7 0.0 0.3 1.0 0 7
sd6 1.0 304.9 0.5 2352.1 0.0 0.3 1.1 1 7
sd7 1.0 298.9 0.5 2764.5 0.0 0.6 2.0 0 13
sd8 1.0 304.9 0.5 2400.8 0.0 0.3 0.9 0 6
iostat -xd (with collected stats)
extended device statistics
device r/s w/s kr/s kw/s wait actv svc_t %w %b
cmdk0 0.4 1.2 24.2 21.4 0.0 0.0 1.9 0 0
cmdk1 0.1 5.7 3.7 709.6 0.1 0.0 12.5 1 1
fd0 0.0 0.0 0.0 0.0 0.0 0.0 982.8 0 0
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 0.5 6.5 46.8 248.2 0.0 0.0 6.0 0 1
sd2 0.5 6.5 46.5 248.2 0.0 0.0 6.0 0 1
sd3 0.5 9.5 46.6 248.0 0.0 0.0 2.5 0 1
sd4 0.5 9.5 46.6 248.0 0.0 0.0 2.5 0 1
sd5 0.5 9.5 46.6 248.0 0.0 0.0 2.6 0 1
sd6 0.5 9.5 46.5 248.0 0.0 0.0 2.5 0 1
sd7 0.5 9.5 46.6 248.0 0.0 0.0 2.6 0 1
sd8 0.5 9.5 46.6 248.0 0.0 0.0 2.5 0 1
Vennlige hilsener / Best regards
roy
--
Roy Sigurd Karlsbakk
(+47) 97542685
r...@karlsbakk.net
http://blogg.karlsbakk.net/
--
I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er
et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av
idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og
relevante synonymer på norsk.
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