the media check problem
Alan Cox
alan at redhat.com
Sat Nov 13 18:29:43 UTC 2004
On Sat, Nov 13, 2004 at 07:06:43PM +0100, Dennis Bjorklund wrote:
> 1) It's the read ahead that causes the problem. If one use
> hdparm and set the read ahead to 0 on the device, then I have
> no problem to verify a cd using dd.
Correct
> Maybe someone like Alan Cox (but not limited to him!) will look at this
> and say it's stupid, and then I don't need to read the code :-)
The "end" of a CD-R is undefined for about 150K. ide-scsi correctly
retries errors at the disk end and reduces the disk size based on the
error position. ide-cd doesn't. It's waiting someone who knows enough about
that area of the block layer to fix it
Alan
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