Jens Rohde wrote:

> "nsrck -L7" recovers your indexes from media, using your media database
> to find the backup of you index. But if these backups are expired, you
> can't recover them using nsrck. Then you can find the volume with the
> actual backup on (not the index backup) and use scanner to recreate the
> index for whatever backups networker will encounter on the tape.

Mostly correct. If your backups are expired, and no longer in the media
database, then scanner is your only option. If the backups are still in
the media database but marked as recyclable, you can change the status
of the save set in the media DB, then run nsrck -L7.

The other difference is that nsrck -L7 recovers all the index data that
was present at the time of the index backup, and merges that with the
current contents of the index. Scanner only adds the index for the save
sets on the tape you are currently scanning.

As Tim said, nsrck -L7 is a MUCH MUCH quicker option than scanner in
most cases.

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