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SubjectRe: JMicron 20360/20363 AHCI Controller much slower with 2.6.18
Andrew Lyon wrote:
> Hi,
>
> I have a Gigabyte GA_965P_DS3 with Core 2 Duo CPU, wd raptor connected
> to onboard JMicron 20360/20363 AHCI Controller, with 2.6.18 the drive
> is very slow:
>
> beast ~ # uname -a
> Linux beast 2.6.18 #1 SMP Wed Sep 20 15:04:24 BST 2006 i686 Intel(R)
> Core(TM)2 C
> PU 6600 @ 2.40GHz GNU/Linux
> beast ~ # hdparm -t /dev/sda
>
> /dev/sda:
> Timing buffered disk reads: 100 MB in 3.02 seconds = 33.10 MB/sec

Which IO scheduler are you using? If you're using anticipatory or cfq,
can you try deadline?

Thanks.

--
tejun
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