Re: INZTAP aborts on CHECK(*YES)

[Dan <dbcemid@xxxxxxxxx>]

Rob, it has been too long for me to recall the exact circumstances under which 
I experienced this
same problem, but it seems to me that we got this error when the tape was not 
yet initialized. 
This obviously isn't your problem, but I wonder if something in the tape header 
is getting
corrupted.

If the failing INZTAP has not actually initialized the headers, I wonder if you 
could restore
something from the tape.

The DSPTAP idea might work, but I'd consider it a weak test.  If it were me, I 
think I'd try to
restore an object from the tape after the CHKTAP to test if it really is a 
media error.  But,
then, you're not getting this error all the time.  Hmmm.  Or I might also 
monitor the media error
counts in SST.  I trust that the tapes are of recent vintage.

If I were getting this error, I think I'd:
 1) DSPTAP
 2) RSTOBJ an object from the first library saved on the tape
 3) Try another INZTAP CHECK(*YES)
If #3 works, then you've got a real head scratcher.
If #3 fails:
 4) INZTAP CHECK(*NO) 
 5) Save a few libraries to the tape (with EXPDATE = today), then try to 
restore them.
 6) ???

Rob, have you checked for APARs?

Probably nothing much useful here, but I HTH.
- Dan

--- rob@xxxxxxxxx wrote:
> We initialize the tapes in our backup.  I realize that there has been some 
> discussion on this, but otherwise...
> 
> I have a backup module which does a CHKTAP followed by an INZTAP.  The 
> CHKTAP retrieves the volume ID and that is used during the INZTAP.  Often 
> the INZTAP will fail with a media error (CPF5349).  We clean the drive 
> immediately before the backup.
> 
> We wondered if it was because the INZTAP is so soon after the CHKTAP.  But 
> that is not it.  The tape can sit in the drive all night long.  In the 
> morning if we do a INZTAP with CHECK(*YES) we'll still get the media 
> error.  However if we change the INZTAP to CHECK(*NO) we do not get the 
> media error.
> 
> The CHKTAP was able to successfully retrieve the volume id, therefore I 
> assume it CAN read the tape.
> 
> Perhaps next time I should do a DSPTAP prior to the INZTAP to see if it 
> will pass that.

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