Now I had to use another tape in the sequence.

the 2st "mt -f /dev/st0" before amcheck or amflush:

drive type = Generic SCSI-2 tape
drive status = 637534720
sense key error = 0
residue count = 0
file number = 0
block number = 0
Tape block size 512 bytes. Density code 0x26 (unknown).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

the 2nd "mt -f /dev/st0" after the amcheck

drive type = Generic SCSI-2 tape
drive status = 637534720
sense key error = 0
residue count = 0
file number = 0
block number = 0
Tape block size 512 bytes. Density code 0x26 (unknown).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

the 3rd "mt -f /dev/st0" after the amflush (also did an mt rewind)

drive type = Generic SCSI-2 tape
drive status = 637534720
sense key error = 0
residue count = 0
file number = 0
block number = 0
Tape block size 512 bytes. Density code 0x26 (unknown).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

So, all is the same it appears.  I was hoping you had something here.

If it were a scsi error, I don't think the clean tapes would recognize
the label.  The label is not recognized after the amflush.

The tape drive has compression on according to the tapetype.  Could this
be the cause somehow  ?

On Fri, 2004-04-30 at 11:02, Paul Bijnens wrote:
> James D. Freels wrote:
> 
> > OK.  Stranger by the minute.  I removed the first tape (01) and set it
> > up to use the second tape(02).  I issued a "amcheck fea" and it said my
> > second tape was OK and that I should be able to backup.  I then issued
> > an amflush and it came back with an error.  I then rewind the tape with
> > "mt rewind", turn around and issue another amcheck fea, and the tape has
> > an error on it.  So, the amflush and/or amdump process is writing
> > something to the tape that causes it to not be usable after that point.
> 
> Try "mt -f /dev/st0 status" before and after the amcheck and after the 
> flush.
> Any difference?
-- 
James D. Freels, Ph.D.
Oak Ridge National Laboratory
freelsjd AT ornl DOT gov