Roger,

I'm curious...

We have a similar setup. e.g. two Rs/6000 with HACMP. The network adaptors
fail over fine, the SSA fails over without a problem.

However we have a problem failing over the drives on the 3494. Our 3494 is
split into two logical libraries with 16drives. 8 drives available to each
server.
The 3590 drives are dual ported allowing us to fail them over from one ADSM
Server to another. This works fine provided that the there is no I/O
activity during the failover. If however there is activity then the drive
does not failover because the SCSI bus does not reset.

How were you able to overcome this?

Nathan
        -----Original Message-----
        From:   Roger Hohmann [SMTP:Roger_Hohmann AT WESTLB DOT DE]
        Sent:   Friday, October 01, 1999 10:24 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Re: Two server with the same database ??

        We are using a pair of adsm servers with hacmp. In normal mode, each
        of them has one adsm running. In case of failure, all filesystems
are
        mounted to the remaining server and he has 2 dsmserv's running, each
        with it's own db. (We had to use different tcpports for admin and
        http). It's a little tricky, and you need to double adaptors and you
        need ssa disks, but it's worth the money.

        If we (or the hacmp) recognizes the server crash, we are up with
both
        servers a on one machine a few minutes later. Our customers won't
        notice it.

        Roger

        -----Urspr|ngliche Nachricht-----
        Von: Riccardo Capecchi <r.capecchi AT CINECA DOT IT>
        An: ADSM-L AT VM.MARIST DOT EDU <ADSM-L AT VM.MARIST DOT EDU>
        Datum: Freitag, 1. Oktober 1999 15:49
        Betreff: Two server with the same database ??


        >I wonder is is possible to have 2 server that work with the same
        clients
        >and have the same database (but only 1 copy of backup and archivied
        >files), mainly the second should be the mirror of the first, so if
        the
        >first crash i've no problem using the second while i rstore the
        first.
        >There is something is ADSM or i should use the operating system ??
        >I use AIX 4.21
        >
        >--
        >                     Saluti, Riccardo Capecchi
        >
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