Re: SW-RAID0 Performance problems

From: Kurt Roeckx (Q@ping.be)
Date: Sat Apr 14 2001 - 07:28:39 EST


On Sat, Apr 14, 2001 at 11:38:06AM +0200, Andreas Peter wrote:
> Am Samstag, 14. April 2001 09:04 schrieb David Rees:
>
> > OK, so it's not the RAID setup. There's two things that can cause this.
> > One is that DMA is turned off (what does hdparm /dev/hda and hdparm
> > /dev/hdc show?), the second was that the drives are on the same channel
> > (which obviously isn't the case here). Can you verify that the drives are
> > in DMA mode?
>
> hdparm /dev/hda
>
> /dev/hda:
> multcount = 16 (on)
> I/O support = 0 (default 16-bit)
> unmaskirq = 0 (off)
> using_dma = 1 (on)

Does turning unmaskirq on help?

Kurt

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This archive was generated by hypermail 2b29 : Sun Apr 15 2001 - 21:00:22 EST