OT 2nd posting pci ata card ??

Dave S ubuntu at pusspaws.net
Sat Apr 1 20:15:34 UTC 2006

On Saturday 01 April 2006 20:55, Antony Gelberg wrote:
> Dave S wrote:
> > On Saturday 01 April 2006 20:28, Antony Gelberg wrote:
> >>Dave S wrote:
> >>>Hi all,
> >>>
> >>>This is a second posting because I could really do with some advice. I
> >>>have a raid HDD on hda and hdc, works a treat.
> >>>
> >>>I have a DVDRW on hdb, it works but cripples my system when I use it. I
> >>>need a workaround.
> >>
> >>Is DMA on for that drive?  If not, turn it on.  man hdparm.  It may well
> >>make a difference.  There's so much conflicting information about this,
> >>and most people who comment have no idea about how IDE or DMA work (me
> >>included).
> >
> > Yep DMA is on, and the drives fly. i am happy with the RAID performance
> > it is faster than a single drive (though not massively so)  but when i
> > use hdb it all but locks up my machine.
> I meant for hdb.

Opps sorry ... I enabled DMA on hdb and got some hda seek errors in syslog, 
some failing to boot due to unable to module problems and fsck failure 
(gulp!) so I turned off DMA for hdb and the system became stable again


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