Neil,

principially you're right. You would have to use savevg to get a backup
of your ADSMVG. I think, the people who wrote the start-up-guide don't
mentioned this, because normally there should be only the ADSM database,
log and diskpools. The database should be backuped by dbbackup and the
diskpools should be backuped by a tape copypool. Therefor there is no
direct necessity to backup the whole ADSMVG. And, you mentioned it
yourself, there is usally a problem of tape-capacity. I would use
mirroring of db, log and data-volumes and rely on ADSM internal recovery
methods. If mirroring via LVM or ADSM isn't practical, use of a raid5
configuration via SSA or equivalent product is another option.

I hope this helps to you
Gottfried

--
      _________________________________________________
      _________________________________________________
\    / Gottfried.Scheckenbach AT xtelligent DOT de
 \  / Consultant Open Systems
  \/
  /\ Xtelligent IT Consulting GmbH
 /  \
/    \ www.xtelligent.de

"Sharp, Neil (London)" wrote:
>
> Does anybody out there have a 3466 NSM. If so can you please help. I am in
> the process of implementing ADSM using a NSM and need to understand the
> implications of a bare metal restore on this system. The 3466 Start-up guide
> mentions the usual following solution :-
>
> 1. Run 'endadsm' to stop ADSM
> 2. Run 'prebackup' script. This unmounts all ADSM filesystems and exports
> the ADSMVG
> 3. Run AIX 'mksysb' command to backup the ROOTVG.
>
> and that's it.
>
> What I'm not happy about is the fact that this is not securing the ADSMVG
> which would also be needed if I ever had to perform a bare metal restore.
> The problem is that the ADSMVG is 132GB and all I have is a single 4mm DAT
> drive with 2GB tape capacity, therefore I'm not even sure if this is
> feasible. I have even read back the contents of the 'mksysb' tape and all I
> can see (as expected) was the rootvg files.
>
> If I was to perform this process then this would have to be performed using
> AIX 'savevg adsmvg' command.
>
> Can any body confirm whether I am worrying in vane or do I need to perform
> this process to ensure that I can rebuild my system from scratch. Many
> thanks for your time in advance.
>
> Neil Sharp
> Merrill Lynch ADSM/TM Administrator
> Work : 0171-573-0469
> Mobile : 07769-741612
> e-mail : sharpnei AT exchange.uk.ml DOT com