Networker operations are priority based in general.
There are 3 general major operations Networker does.
1. Recover
2. Backup
3. Clone
The higher in the list above the higher the priority.
This said the question remains when will a higher priority operation
suspend a lower priority one.
This lower priority task suspension will only take place at "volume
switch" time (unload/end of use). 
Assuming all your drives are busy backing up and you want to do a
recover, the recover will wait until the first unmount could be done to
a currently mounted volume. At this time the recover will request the
first needed tape to be mounted in the just freed device.
As recovery has the highest priority, this device used will not be given
up to any lower priority operation as long as the recover has not
finished.
Once the recover has finished the suspended operation will continue.
Itzik

> -----Original Message-----
> From: Legato NetWorker discussion 
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Stan Horwitz
> Sent: Thursday, March 10, 2005 16:09
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: Re: [Networker] Right of way for recovers?
> 
> On Thu, 10 Mar 2005, Howard Martin wrote:
> 
> >Rather than using the write protect device on the tape we 
> tend to mark 
> >the volume as read only in the GUI - might be I'm too lazy 
> to walk to 
> >the jukebox.
> 
> Even if you set the write-protect tab on a tape cartridge, 
> NetWorker may still attempt to write to that tape if it is 
> still appendable. I see no advantage to setting the 
> write-protect tab on cartridges that NetWorker uses unless 
> maybe you ship the tapes off-site for safe keeping. Setting 
> the tape volume as read only from within NetWorker seems 
> adequate to me.
> 
> --
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