Orion Poplawski wrote:
> I got the following error trying to burn a DVD on an IBM USB2 DVD-R burner:
>
> Nov 7 11:40:36 makani kernel: cdrom: This disc doesn't have any tracks
> I recognize!
> Nov 7 11:41:59 makani kernel: sr 0:0:0:0: SCSI error: return code =
> 0x8000002
> Nov 7 11:41:59 makani kernel: sr0: Current: sense key: Data Protect
> Nov 7 11:41:59 makani kernel: ASC=0x27 <<vendor>> ASCQ=0xff
>
> This is on Fedora Core 4 and kernel 2.6.13-1.1532_FC4.
>
> It turns out that this is because the drive did not have enough power
> (it was not plugged into the separate ac adapter). I was able to
> determine this by booting into Windows, which gave me a nice descriptive
> error message.
>
> I was wondering if it makes sense for the kernel drivers to know these
> error messages and report better errors, of it should be left up to user
> space tools.
I think that you can guess the answer to the above query.
Asc and/or ascq codes >= 0x80 (and <= 0xff) mark the
additional sense code as vendor specific.
The ascq code looks suspicious. An asc/ascq tuple of
<0x27,0x0> ("Write protected") would tie in pretty well
with the sense key of "Data Protect". A better choice
might be <0x5e,0x0> "Low power condition on".
Doug Gilbert
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