Author: Peter Salisbury Date: To: lug, Hampshire LUG Discussion List CC: Subject: Re: [Hampshire] Ubuntu, DMA, and 32-bit I/O
On Monday 11 Feb 2008, Vic wrote: > Hi All.
>
> I've just installed Kubuntu on a machine here. It's not going
> well...
>
> Specifically, drive access is *very* slow. hdparm tell me that it
> is running in 16-bit mode, with DMA disabled.
>
> hdparm -c1 /dev/sda fails with "Invalid argument", hdparm -d1
> /dev/sda fails with "Inappropriate ioctl for device".
>
> The drive in question is a 40GB Hitachi PATA device. It appears to
> be using either the ata_piix or ata_generic drivers (both are
> listed by lsmod), and these in turn use libata.
>
> Does anyone know how to fix this? Google only seems to say "rebuild
> your kernel", which isn't a long-term option here...
>
> Vic.
Is that your only drive? I had serious problems when mixing SATA and
PATA. I ask because you have a PATA device showing up on what looks
like a SATA device node /dev/sda
