New standard proposal
manmower at signalmarketing.com
Sat Sep 27 07:58:18 EEST 2003
On Sat, 27 Sep 2003, Carlos [ISO-8859-1] Perelló Marín wrote:
> El vie, 26-09-2003 a las 22:36, Derek Foreman escribió:
> > On Fri, 26 Sep 2003, Carlos [ISO-8859-1] Perell Marn wrote:
> > > El vie, 26-09-2003 a las 04:45, Derek Foreman escribi:
> > > > On Fri, 26 Sep 2003, Carlos [ISO-8859-1] Perell Marn wrote:
> > >
> > > Backing up a disc?
> > Making a copy of a cd. This also has to be done with the disc unmounted.
> Hmmmm, I don't see why it should be unmounted :-?
Things like El Torito boot images don't show up in the filesystem, so to
make a bootable backup things get a little complicated.
> > Which ioctl? I'd like to see how my drive reacts to it.
> Just look at this:
Unfortunately, it doesn't work on my machine (linux kernel 2.6.0-test5).
AFAICT, the command was introduced in MMC2, yet two of my 4 drives don't
support it at all. (so you'll need a different detection method for a
lot of drives)
The other two drives accept the command, but the command's buffer comes
back still full of 0s. This appears to be a kernel bug, since sending the
same command with SG_IO behaves as expected. I've reported this on the
linux kernel mailing list.
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