Alan D. Brunelle wrote:
>
>
> (0,1) 1 2 4 8 16 32 64 128 256
> RHEL4U2 23.8 46.8 87.8 89.6 89.5 89.6 89.5 89.5 89.5
> 2.6.14 3.9 7.8 15.6 31.2 62.5 89.6 89.5 89.5 89.6
> Differ -83.6% -83.3% -82.2% -65.2% -30.2% 0.0% 0.0% 0.0% 0.0%
>
> (0,1) means target 1 on bus 0, and then the columns represent different
> transfer sizes (1K up to 256K). I also see some that show little if any
> difference:
>
> (6,4) 1 2 4 8 16 32 64 128 256
> RHEL4U2 23.9 46.9 88.5 90.0 89.9 89.9 89.9 90.0 89.9
> 2.6.14.2 24.1 47.0 88.5 90.0 89.9 90.0 89.9 89.9 89.9
> Differ 0.8% 0.2% 0.0% 0.0% 0.0% 0.1% 0.0% -0.1% 0.0%
>
Did you apply [PATCH] mptfusion : dv performance fix by
Eric Dean Moore? (Dec. 1st, 2005) W/o that patch the first four disks of
an 1030 are performing 3.5 MB/s instead of 70 :-)
It was funny how slow a RAID 5-0 can be when four of fourteen disks
are slow...
GS
--
Gerhard Schneider
Institute of Lightweight Design and e-Mail:gs@xxxxxxxxxxxxxxxxx
Structural Biomechanics (E317) Tel.: +43 1 58801 31716
Vienna University of Technology / Austria Fax: +43 1 58801 31799
A-1040 Wien, Gusshausstrasse 27-29 http://www.ilsb.tuwien.ac.at/~gs/
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