Geoff,

The upgrade process duration is minimal.  The dependency is the size of
your database: the actual database upgrade time is minutes to maybe a
few hours.  You can expect it to go smoothly with respect to the level
of customization of your server.

As with any large change make sure that your daily processing is
completed, make 2 backups of your ADSM database and copy your server (&
client) configurations prior to performing the upgrade.

The issue of optimally configuring for transfers from disk to tape are
the standard issues of spindles & connections.  You don't say SSA but
that would be the typicall RS/6000 configuration for disk.  SSA network
design can optimize performance but valid layouts are pretty good.

Each Magstar 3590-E1x tape drive should be on its own SCSI controller.
Putting two one one controller would work but would also cause more
delays on the bus.

The other, much greater issue it the design of your policy and storage
pool hierarchies.  But this goes beyond a simple upgrade.

The back-out process is simply to remove the software, easy on AIX, and
reinstall the original software plus all successive maintenance
releases, restore the ADSM database (which can be very expensive in
terms of additional disk requirements due to the old restore/reload
database growth bug).

After the upgrade repeat the process of getting ready for the upgrade
(minus the daily processing).

Regards,

Steffan

"Gill, Geoffrey L." wrote:
>
> Here is what I have in case it helps anyone find an answer. An H50 dual
> processor with 512mb memory running AIX 4.3.3, ADSM V3.1.2.55, 3494 Library
> with 4 3590-E1A drives, 14 36gb disks for pools....
>
> I'm wondering if there are any things I should look for to make sure I have
> the system optimally configured for data transfer rates from disk to tape,
> client to tape and tape to client for restores. Is there settings I can
> change to do this or is everything supposed to be configured already when
> it's installed. I didn't install it so I don't know.
>
> More questions on upgrading from V3.1 to 3.7...
>
> If anyone has already done this how long is the process?
>
> Can I expect a clean install?
>
> Do I have to do anything after the upgrade or can I just bring ADSM back
> online?
>
> Do I need to do anything after I bring ADSM back online?
>
> What happens if something goes wrong???
>
> How much trouble is it to back a state that things will work, not that I'd
> expect any problems of course.....
>
> Thanks again for the help,
> Geoff