Hi,

as per subject line: is it possible to downgrade a machine that has been
upgraded from Solaris 9 to Solaris 10 again to Solaris 9?

We can't make Veritas NetBackup 4.5 communicate with our tape loaded
StorEdge L7 (veritas sg driver does nothing on Solaris 10) and the whole
issue with upgrading NetBackup to 5.0 that apparently supports Solaris 10
is messy and seem to require additional funds :-(

I know that on the long run we should get rid of Veritas and roll our own
backup system, but the licence came with the drive (probably paid dearly
for that 2 years ago!) and was silly not to use :-\

This is rather urgent for us since in the meantime we can't do backups of
that system...

Alternatively, does anyone has a sg driver (from
/usr/openv/volmgr/bin/driver and /usr/openv/volmgr/bin/driver/64) for
NetBackup 5.0 that _works_ with Solaris 10 which I can try? Would it work
with NBU 4.5?

Thanks and bye, Dragan

-- 
Dragan Cvetkovic, 

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

!!! Sender/From address is bogus. Use reply-to one !!!

Dragan Cvetkovic <me@privacy.net> wrote:
> as per subject line: is it possible to downgrade a machine that has been
> upgraded from Solaris 9 to Solaris 10 again to Solaris 9?

You didn't have a backout plan as a part of the upgrade?

There is no way to actually perform a downgrade from 10 to 9.  If you
used live-upgrade to do the upgrade then just activate the old BE and
reboot.
If you didn't use LU, and you didn't plan for some other backout, then
you'll need to restore from backups.

> We can't make Veritas NetBackup 4.5 communicate with our tape loaded

Before upgrading OS versions it's always worth talking to your software
vendors to make sure that software is supported under the new version -
especially for software which includes a kernel module as these will often
be specific to the release of Solaris being run.

If you can't get their confirmation, then at least _test_ it on another
server by installing S10 and NetBackup and see if it works!

  Scott

Dragan Cvetkovic <me@privacy.net> writes:

>as per subject line: is it possible to downgrade a machine that has been
>upgraded from Solaris 9 to Solaris 10 again to Solaris 9?

No.  Upgrades are one way; upgrading from S10 to S9 requires the S9
installer to have knowledge of S10; and that's not possible.

Casper
-- 
Expressed in this posting are my opinions.  They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.

Scott Howard <scott@hunterlink.net.au> writes:

> Dragan Cvetkovic <me@privacy.net> wrote:
>> as per subject line: is it possible to downgrade a machine that has been
>> upgraded from Solaris 9 to Solaris 10 again to Solaris 9?
>
> You didn't have a backout plan as a part of the upgrade?

No.

> There is no way to actually perform a downgrade from 10 to 9.  If you
> used live-upgrade to do the upgrade then just activate the old BE and
> reboot.
> If you didn't use LU, and you didn't plan for some other backout, then
> you'll need to restore from backups.

OK, it seems that's what I'll have to do. Except that the backups are on
the NetBackup driven tape loader :-( Catch 22.

>
>> We can't make Veritas NetBackup 4.5 communicate with our tape loaded
>
> Before upgrading OS versions it's always worth talking to your software
> vendors to make sure that software is supported under the new version -
> especially for software which includes a kernel module as these will often
> be specific to the release of Solaris being run.
>

Yes, yes, I know. 

And Veritas wants money for supporting and upgrading the backup system.

I am now playing with idea of ditching NetBackup and start using one of
mtx/sgen/stclt solutions as per
http://sunportal.sunmanagers.org/pipermail/summaries/2003-May/003783.html

Dragan

-- 
Dragan Cvetkovic, 

To be or not to be is true. G. Boole      No it isn't.  L. E. J. Brouwer

!!! Sender/From address is bogus. Use reply-to one !!!