Re: Software RAID problems (bad filesystem type)

["Benedict Verheyen" <linux4bene@pandora.be>]

Timo Railo wrote:
> Something is wacky. Any idea what could be causing such a poor
> performance. Quite new hardware, normal IDE, disks in separate BUSses.
>
> tmoby:~# hdparm -T /dev/md0
>
> hdparm -Tt /dev/hda /dev/hdc /dev/md0
>
> /dev/hda:
>   Timing buffer-cache reads:   1828 MB in  2.00 seconds = 914.00
>   MB/sec Timing buffered disk reads:    8 MB in  3.00 seconds =
> 2.67 MB/sec
>
> /dev/hdc:
>   Timing buffer-cache reads:   1864 MB in  2.00 seconds = 932.00
>   MB/sec Timing buffered disk reads:   10 MB in  3.69 seconds =
> 2.71 MB/sec
>
> /dev/md0:
>   Timing buffer-cache reads:   1864 MB in  2.00 seconds = 932.00
>   MB/sec Timing buffered disk reads:   10 MB in  3.63 seconds =
> 2.75 MB/sec
>
>
> Cheers,
> Timo Railo

Check your hd settings via hdparm -i /dev/hda to see if dma is enabled.
It's normally disabled so you'll have to enable it.
hdparm -d1 /dev/hda to set it.
Then adjust the hdparm script in /etc/init.d to enable this on startup
or
adjust your kernel to always set this automatically.

Regards,
Benedict