We do something like this with a script, using manual backups, on certain 
Solaris and Linux hosts.  We don't worry about OS backup on the servers in 
question, since the boot disks are configured through Jumpstart / Kickstart.

The core steps are:

1) On each directory supplied, run:  find $DIR -type f -mtime -${DAYS} >> 
$SOME_FILE

2) save -s $SERVER -u -l full -y "$RETAIN" -w "$RETAIN" -b $POOL -I $SOME_FILE 
>& $SOME_LOG
## Note most of our clients are on 7.4.1, which is why I get away with "-l 
full" for now.  YMMV later...

3) verify with an mminfo scan, as well as scanning $SOME_LOG.  A secondary set 
of scans is recommended (run on Server's side).

The detail logic is written in C Shell, which is why I'm not posting it here.  
:)

--TSK



George Sinclair wrote:
> Kind of a goofy question, and I would never need to do this, but I'm 
> just curious if this is possible.
> 
> Can you run a numeric backup, but have it start with an older date? In 
> other words, capture all files since the previous lower numbered backup 
> but only up to, say, a week ago, and not up to the current time?
> 


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