[plug] CDROM weirdness

[William Kenworthy]

Try doing the md5sum twice, one after the other.  I have a problem where
the first run will always fail, all subsequent runs will be good until
the cd is changed.  The only reference related to this that I have found
is that some floppies will fail when md5sum'med the first time as a
buffer in the driver needs flushing to give a clean run - this seems a
logical explanation

billK

On Thu, 2002-01-03 at 09:35, Andrew Furey wrote:
> Howdy folks (Happy New Year and all that).
> 
> I have an Acer 12/8/32 CDRW drive, so I'm using SCSI
> emulation. It seems to work fine, but for one nagging
> problem...
> 
> When I use dd and md5sum to verify CDs I burn, dd
> seems to read slightly more than the original image
> (maybe 4-8 kb). I'm guessing this is the fixating
> section of the CD. If I use count= , the md5sum
> matches that of the original ISO. Hence the CD does
> work, but it's very annoying having to specify the
> count value.
> 
> My CDROM at home has no trouble with CDs burned from
> this burner (dd gets the correct size). I've also
> noticed it (the CDRW) has much the same problem with
> some pressed CDs (but not all).
> 
> Anyone have any ideas?
> 
> TIA,
> Andrew
> 
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