On Tue, 22 Feb 2005 11:08:15 +0100, Michael Theurich
<Michael.Theurich AT ANITESYSTEMS DOT DE> wrote:

>my company is going to install a new backup sw version(7.2) on a new
machine (Solaris8) with a new tape library, for about 5 clients(all
Solaris8). For a limited time, we want to be able to restore files from the
old backup system, therefore I want keep the old client versions for a
while. Thus, my migration scenario is as follows:
>
>current:
>========
>clients(v5.4) <----> serverA(v5.4)   save + restore to DDS3 tapes
>
>intermediate:
>=============
>clients(v5.4) <----- serverA(v5.4)   occasional emergency restore from
DDS3 tapes
>              |                      (using old indexes, shutdown serverB)
>              |
>              +----> serverB(v7.2)   save + restore to LTO2 tapes
(starting with fresh indexes)
>
>final:
>======
>clients(v7.2) <----> serverB(v7.2)   save + restore to LTO2 tapes

I should have added that this is a sensible migration plan, since upgrading
the clients will prevent you from restoring from the old server. The only
comment I would make is that it would not be necessary to shutdown server B
in the intermediate stage for restores, a client can legitimately be
configured to backup/restore to/from more than server. You will of course
need to make changes to the servers file on all your clients.

You could of course upgrade your old server to 7.2 in the future if you
require restores at a later date (after upgrading the clients).

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