Re: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt

Jens Axboe
2003-11-13T12:20:58Z

On Thu, Nov 13 2003, Bill Davidsen wrote:
> On Tue, 11 Nov 2003, Linus Torvalds wrote:
>
> >
> > On Wed, 12 Nov 2003, Pascal Schmidt wrote:
> > >
> > > My guess would be that an MO drive needs a different way to find out
> > > the capacity than a CD-ROM. After all, when using ide-scsi, it is the
> > > sd driver and not sr that handles the drive. The rest of the problems
> > > could be due to the wrong capacity information?
> >
> > Yes. That would explain a lot.
> >
> > The ide-scsi thing never uses "cdrom_get_last_written" crud. It just uses
> > the regular READ_CAPACITY command (0x25).
> >
> > Which is what ide-cd.c will fall back to as well ("cdrom_read_capacity()")
> > but I think it should _start_ with that rather than fall back on it.
> > That's the simple case, after all.
>
> Are there any cases when the last_written size is really what's wanted,
> rather than the capacity? Such as unclosed multi-session iso9660, ufs, or
> whatever else I'm ignoring?

Yes, for packet written media.

--
Jens Axboe