On Wed, 28 Jul 1999 [EMAIL PROTECTED] wrote:
>
> I am having difficulities using a Digital TZ89 SCSI tape drive under Linux.
>
> All the mt options seem to work without complaint (erase, offline, rewind,
> status). I
> created a backup using the following commands:
>
> export TAPE=/dev/st0
> tar cv /home /usr/src
>
> The backup appears to run normally. However, when I use ' tar t ' to test
> the backup,
> numerous files check-out ok, but then the drive hits a spot on the tape and
> reports
> the following error:
>
> tar: Read error on /dev/st0: I/O error
> st0: Error with sense data: Current error st09:00: sense key Medium Error
> Additional sense indicates Recorded entity not found
>
> Is this a bad tape or is something else going wrong? Any help greatly
> appreciated.
>
It is bad tape or drive malfunction or something like that. The drive
read-after-write did not catch it but reading the tape again did. The
Linux SCSI subsystem seems to operate correctly. The drive has found a
problem and reported it back to the host using the sense data.
tar t does not actually check any data. However, it has to read the whole
data and this is why the drive found the problem. You should use 'tar d'
if you want to verify the data.
Kai
