Tape driver probs.

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Article #438

#438

From: dave
Date: Thu, 12 Nov 1992 00:32

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TAPE DRIVER PROBS

We have a non DEC tape drive on our unibus vax. It used to work well (VMS 4.x)
but has fallen into disuse.

We wish to start reusing it VMS 5.4 
but it does funny things when being written to.

The unit inits and mounts OK but when a file is copied to the drive it
reads forward until it falls off the feed spool.

The test programme in I/O users part I pages 6.30-6.33 falls over at 
QIO_W - IO$_CREATE etc at the top of 6.31.

If FIB$M_REWIND is used as appropriate the programme runs until the QIO
read reverse command. This fails with a SS$_FORMAT (the drive cannot read
backwards).

Question:  Is SS$_FORMAT the correct response for an invalid read command?
If not, what is?.

Does this questionable response explain the unwinding of the feed spool?

Dave   :-(

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Message-ID: <1992Nov12.123203.138@chmeds.ac.nz>

Path: arc1-ca.pugleaf.net!sparky!uunet!comp.vuw.ac.nz!canterbury.ac.nz!chmeds.ac.nz!dave

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Path: arc1-ca.pugleaf.net!sparky!uunet!comp.vuw.ac.nz!canterbury.ac.nz!chmeds.ac.nz!dave
From: dave@chmeds.ac.nz
Newsgroups: vmsnet.internals
Subject: Tape driver probs.
Message-ID: <1992Nov12.123203.138@chmeds.ac.nz>
Date: 12 Nov 92 12:32:03 +1200
Lines: 25