[ILUG] CRC Errors and UDMA Drives

[John P. Looney]

Trevor Johnston wrote:
> 
> I was trying to install Redhat Linux 5.1 and 6.0 on someone's
> machine, but both times I started getting errors that Redhat's site
> describes as data CRC errors on the UDMA bus.
> 
> The messages look something like this, but not exactly; mine lacked the
> BadCRC word, for one:
> da: dma_intr: status=0x51 { DriveReady, SeekComplete Error }
> hda: dma_intr: error=0x84 { BadCRC, DriveStatusError },
> LBAsect=6409335,sector=2344676
> hda: dma_intr: status=0x51 { DriveReady, SeekComplete Error }
> hda: dma_intr: error=0x84 { BadCRC, DriveStatusError },
> LBAsect=4070019, sector=5360
> hda: disabled DMA
> ide0: reset: success
> 
> I tried disabling UDMA, but to no avail. At this stage I am without
> ideas. Does anyone have any ideas? Sometimes the installer can't even get
> the disk formatted.

 It's not DMA. Recompile a 2.2.13 kernel with "Set multimode on by
default" or something like that. Could be a 2.3 kernel option. Can
anyone with access to a 2.3.x kernel confirm it ? In the help thing for
that option, it goes on about "if you see errors like..x..set this
option".

 Come to think of it, you can set multimode to be on, with hdparm too.
Try that, see do the errors go away.

Kate

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