Big Brother tells me that Gill, Geoffrey L. wrote:
> To all,
>
> For all those who are thinking of upgrading to 4.2.1, my opinion is don't. I
> have been up on it for 10 days and have already experienced 3 crashes. I
> also have a tape problem that I'm told was supposed to have been fixed. I
> have 2 PMR's open, both at level 2. I'm on AIX 4.3.3 and not sure if other
> platforms have had similar problems.

    I have had problems which I posted here that I recently solved.  Since
they have to do with upgrades, I thought I'd post it on this thread.

    I have an AIX 4.3.3 box with a 4mm tape drive.  I installed TSM 4.1.0.0
and added the drive in TSM with:

DEFINE LIBRARY MANUALLIB LIBTYPE=MANUAL
DEFINE DEVCLASS 4MM2GCLASS DEVTYPE=GENERICTAPE LIBRARY=MANUALLIB 
MOUNTRETENTION=9999 MOUNTWAIT=2880
DEFINE DRIVE MANUALLIB RMT0 DEVICE=/dev/rmt0

    This box was a test machine for testing out TSM procedures before using
them on the production machine.  After a while, I decided to reinstall the
machine from scratch, so I installed AIX 4.3.3 and TSM 4.1.0.0.  The first
time through, I didn't bother to upgrade to 4.1.4.0.  This time I decided
to.  After installing TSM, I applied the patches.  Before I reinstalled the
machine, I exported all of my nodes to 4MM2GCLASS tapes.
    I used the same three commands above to tell TSM about the tape drive,
but the third command gave an error:

ANR8420E DEFINE DRIVE: An I/O error occurred while accessing drive RMT0.
ANS8001I Return code 3.

    I posted to the list, and was told that I was doing this wrong.  I needed
to rmdev rmt0, and then rediscover the tape drive as a TSM drive with smitty,
and then use mt0 instead.  This made no sense, in that every other machine
that I have a tape drive on (including this machine before the reinstall)
worked with rmt0.
    I tried this, and the DEFINE DRIVE worked.  However, the IMPORT NODE
failed when I tried to reload the data.  It complained that there were
not enough mount points available.
    I played with this for a while, and eventually I had an epiphany.  I
reinstalled 4.3.3 and TSM 4.1.0.0, and then defined the drive in TSM with
the commands above, _before_ applying the patch.  It worked.  I then
applied the patch and IMPORTed the nodes with no problem.
    On my production server, I had recently added a tape drive, and the
server was at 4.1.2.0.  I had no problem adding the drive.  Some time
later, I upgraded to 4.1.4.0.  Had I done this in reverse, I probably
would never have gotten the tape drive working.  It would appears that
a bug crept in somewhere between 4.1.2.0 and 4.1.4.0 wherein DEFINE DRIVE
for a GENERICTAPE drive fails.  One has to define the drive before
upgrading...