Re: Iomega Ditto tape unreliable?
On Mon, 13 Jul 1998, Stephen J. Carpenter wrote:
> 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?
I am using /dev/nqft0 for tape movements and /dev/zqft0 for backups
I used dump and restore but with a lot of frustration.
Here is the script I used:
kerneld
ftmt -f /dev/nqft0 retension
ftmt -f /dev/nqft0 rewind
dump 0uBbf 2000000 10 /dev/zqft0 /
ftmt -f /dev/nqft0 eom
dump 0uBbf 2000000 10 /dev/zqft0 /home
ftmt -f /dev/qft0 status
> mt /dev/st0 retension # this retensions the tape, dunno if the diitto needs
> # it but my drive does
ftmt -f /dev/nqft0 retension # works well.
$ftmt -f /dev/zqft0 status # also works:
This is a Iomega DITTO 2GB floppy tape drive, (drive type = 0x8883)
drive status = 0x00e31c65
generic drive status = 0x49000000
(In particular: * at begin of tape * at end of data * tape online * )
sense key error = 0x00000000
residue count = 0
file number = 0
block number = 0
MTIOCVOLINFO result:
file number = 0
block size = 28672
physical space used = 1.0 gigabytes
real size of volume = 0.0 kilobytes
MTIOCGETSIZE result:
total bytes on tape = 1.0 gigabytes
total bytes used = 29.0 kilobytes
total bytes left = 1.0 gigabytes
but
> tar czlvf /dev/st0 / # compressed - can't auto-verify compressed archives
> # with tar
> OR
> tar cWlvf /dev/st0 # uncompressed AND verify
$ tar cWlvf /dev/zqft0
tar: Cannot write to /dev/zqft0: Invalid argument
$ tar cWlvf /dev/qft0
tar: Cannot write to /dev/qft0: Invalid argument
I do not know why this happens. When I installed ftape I tested it with
the tar - routines in the ftape-documentation and it worked. When I tried
that again now, it wouldn't work.
Does anybody knows how to correct this?
Johann
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