Milan Ker?l?ger wrote:
>On Thu, Feb 03, 2005 at 11:08:37AM -0000, Nigel Kendrick wrote:
>
>
>>Hi folks,
>>
>>I have just installed a PCI SATA controller based on the SIL3112A
>>chipset into my Centos-3 (latest kernel patches applied) system and
>>moved an existing (not the boot disk) SATA drive from the onboard
>>controller to the SIL-based one so I can setup software RAID with two
>>300GB drives. Kudzu/Linux found the controller and drives straight away
>>and they've appeared as 'hda' and 'hdc'.
>>
>>I've managed to partition hdc (hda was already setup) and format it -
>>this was VERY slow and 'top' showed a significant amount of interrupt
>>time. A bit of Googling found the right command to enable DMA (hdparm
>>-X66 -d1 /dev/hda etc.) and this seems to have cured that problem!
>>
>>
>
>You have to use sata_sil module (libata) but if you are lucky like me,
>you will not have a luck with performace. It heavily depends on HW
>vendor (not on chipset itself).
>
>You may try to use kernel 2.6 too.
>
>
>
A better answer is to avoid using this "raid" chipset entirely and treat
it as a dumb SATA IDE controller. Then use the linux software raid tools
which are probably a lot better tested and offer outstanding performance.
Cheers,
--
Chris Mauritz
chrism@xxxxxxxxx
VP & chief Technology Officer
Independent Music Network, Inc.
http://www.imntv.com
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