Re: Iomega Ditto tape unreliable?
On Mon, Jul 13, 1998 at 10:59:29AM +0200, Johann Spies wrote:
> A lot of errors start showing. Over the weekend I was trying to restore
> from a recently made backup which was made using dump. Restore ran for a
> few hours without restoring a single file from the selection I made and in
> the end gave up with a hardware error notice.
What is the /dev device name for this? does it look like a standard
tape drive (ie my tape drive is nst0 and st0 )?
What was teh command line you used to backup?
> Is there hope for a reliable backup and restore program in Linux? I have
> tried tob, tbackup, dump and restore and no one so far could give me the
> impression that the system is reliable.
ok try this....(this example assumes the drive is /dev/st0 ...adjust to
suit it)
mt /dev/st0 retension # this retensions the tape, dunno if the diitto needs
# it but my drive does
tar czlvf /dev/st0 / # compressed - can't auto-verify compressed archives
# with tar
OR
tar cWlvf /dev/st0 # uncompressed AND verify
Then to restore:
tar xvf /dev/st0
This works for me with my tape drive every time
Mine however is NOT a ditto so...YMMV. Mine is a Segate T*Store Travan-4
SCSI tape drive (4 gig uncompressed)...
You might want to try not using mt to retension first...if you get errors
try again with it... I find that I need it and get errors without it
(but 4 gig tapes are rather long tapes and more suceptable to stretching)
if this works then there is something wrong with how you are invoking your
backups
NB: the above incantations ofr tar took me some time to come up with
if you have multiple partitions (ie /usr or /home on a differnet partition
from /) then you need to list it ie
if /home is on a differnt partition from / then:
tar <options> / /home
reason: tar option l only follows the local filesystem (to avoid trying
to archive /proc which doesn't really exist on disk...when you
have 128 MB of physical ram like I do...archiving /proc/kcore is a big
deal ;) )
-Steve
--
/* -- Stephen Carpenter <sjc@delphi.com> ------------------------------ */
A favorite quote from a source I forget:
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