Re: Promise IDE controller crashes 2.4.22

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Sun, 2003-11-30 at 09:07, beolach@juno.com wrote:
> I recently had a very similar problem to this on my computer with a
> Promise Ultra133TX2 (PDC20269) addon card.  In my case I had a Western
> Digital drive attached to the PDC20269 that would have major filesystem
> corruption when DMA was enabled during the boot process.  Interestingly,
> if I disabled DMA during boot, and then enabled it after boot with
> hdparm, the drive worked OK.  Also, if I moved the drive to my
> mainboard's IDE controller, it would work.  It seemed to be a
> combination of my drive & IDE controller, because the IDE controller
> works fine with other drives, and the WD hard drive worked fine with
> another IDE controller.  I replaced the drive (20 GB) with a 120 GB
> Maxtor drive, and haven't had any problem since.

Did you have something on the "other" channel ?

Andre seems to imply that the Promise chip may trigger interesting
bugs if you do things like SET_FEATURE on one channel while another
is doing DMA, kind of things that may well happen during boot

Ben.