It seems Greg Lehey wrote:
> On Monday, 13 December 1999 at 9:03:16 +0100, Soren Schmidt wrote:
> > It seems [EMAIL PROTECTED] wrote:
> >> Will the backdown to PIO mode be permanent till the next reboot of the
> >> machine, or will the driver be able to attempt to return to DMA mode after
> >> a timeout period. I'm only seeing these errors under really heavy disk
> >> activity (mutlitple nfs readers and writers plus rsync/mirror jobs to the
> >> vinum volume in question).
> >
> > The fallback is permanent, but it only occurs after 3 retries on the
> > failed request. If it fails 3 times in a row, there is something
> > really wrong on that channel, ie bad cableing etc etc...
>
> Wouldn't it be possible to find some way to manually reenable DMA?
> Having to reboot seems rather hard.
The retry count is pr request, and if the same request fails 3 times
in a row, belive me you dont want to run DMA on that drive :)
-Søren
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