Re: Software RAID problems (bad filesystem type)

[Timo Railo <timo@tmoby.com>]

Thanks Benedict,

this is what happened (also tried just -d1).

hdparm -d 1 -c 1 /dev/hda

/dev/hda:
 setting 32-bit IO_support flag to 1
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 IO_support   =  1 (32-bit)
 using_dma    =  0 (off)

Man this is tough...

Timo


> 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
>
>
>
>
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