Yes, you can mirror; but its not required.
You can define 2 Administrative Schedules to control the migration.  One
to reduce the hi value and the second to restore it.

For example I have a Admin schedule named std_migstart with the command
  "upd stg backuppool hi=1 lo=0 migpr=2".
and the second Admin schedule named std_migstop with the command
  "upd stg backuppool hi=70 lo=50 migpr=1"

If you were not migrating your disk pool in order to keep files on disk for
quick recovery, you can still accomplish this by Updating your disk storage
pool to include the option CAChe=Yes.

You should create a copy pool, to prevent the loss of data due to a tape
failure.

On Fri, 20 Nov 1998, Steven McNicholas wrote:

> Hi,
>
> In the company I am working for their adsm system is used in the following 
> way....
>
> 1) aix clients are backup up to disk pools
> 2) These disk pools have migration thresholds of
> low=0% high =80%
> 3) If the high is reached then it is migrated to a tape pool.
>
> My question is this :
>
> If during the daily backup this high threshold is not met on some of the disk 
> pools,then this means that there is a whole load of client data residing on 
> (in our case)  1 disk.
> If that disk pops then goodbye data ( could be maybe 3 days worth ?)
>
> What is the solution to this ?
>
> Is it possible to mirror the disk pools aix logical volume  to another disk 
> using aix ? or is this not possible because there are adsm disk pools in the 
> lv ?.
>
> Would it just be better to lower the high migrate threshold to a very low 
> value ?
>
> There is no disaster recovery as yet for this machine (no offsite backups etc 
> ) but in the meantime I still do not want to end up losing any data due to 
> disk failures etc.
>
> Please help.
>
>
>
> Free web-based email, anytime, anywhere!
> ZDNet Mail - http://www.zdnetmail.com
>