It is for removable/ejectable media that TR-4 is not generally done.
Basically it is a noise maker if you have to push/pop the media in to
place. Note that ATAPI is not my strong suit, but that is what I read.
Have to go dig in the SFF stuff and Gadi's notes.
On Wed, 9 Aug 2000, Roger Gammans wrote:
> On Tue, Aug 08, 2000 at 02:58:56PM -0400, pb@dev.localweb.com wrote:
> >
> > I'm using a Seagate IDE tape drive (I understand it's basically a Travan
> > tape drive) on kernel 2.2.16, and when I read from it, it doesn't read the
> > last 18k from my backups; everything else seems to work.
> > Here's the information the kernel prints for this:
> >
> > Aug 8 10:06:52 www6 kernel: ide-tape: hdb <-> ht0: Seagate STT8000A rev 5.51
> > Aug 8 10:06:52 www6 kernel: ide-tape: hdb <-> ht0: 600KBps, 14*26kB buffer, 5850kB pipeline, 80ms tDSC, DMA
> >
> > During testing, I also get some other messages, too. I understand
> > they have to do with drive locking?
> >
> > Aug 8 14:41:04 www6 kernel: ide-tape: ht0: I/O error, pc = 1e, key = 5, asc = 20, ascq = 0
> > Aug 8 14:41:36 www6 last message repeated 5 times
> > Aug 8 14:41:49 www6 last message repeated 4 times
>
> I've seen this sort of thing a lot.
>
> I now use the ide-scsi layer for tape drives as the scsi tape driver
> seems much more reliable.
>
> I think my problem is to do with time out issues, in that the ide driver
> doesn't givev much pause for error code, key/asc/ascq= 2/4/1.
>
> The drive is reporting unknown command (0x1e). This isn't
> documented in my copy of qic157d.
>
> Additionally that commend is list in the 2.2.17pre3 ide command
> #defines. Hmm.
>
> Faulty memory? etc. . Check your ide-tape.c file for
> a line which says '#define IDE_TAPE_*_CMD 0x1e'
>
> Unless there's an ioctl which meant this has been issues from userspace.
>
> In which case it a BRU issue.
>
> --
> Roger
> Think of the mess on the carpet. Sensible people do all their
> demon-summoning in the garage, which you can just hose down afterwards.
> -- damerell@chiark.greenend.org.uk
>
>
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>
Andre Hedrick
The Linux ATA/IDE guy
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