we noticed this problem on over servers where tapes are half empty...
so  we made the tape wait in the drive 30 minutes before getting eject.
the effect of this is there is always a tape loaded. when the tape fills
... business as usual. worked for us like a charm.


hope that helps....
cheers.



Donaldson, Mark wrote:

>So this is a standalone or stacker drive unit?
>
>If it's ejecting the tape before full and loading the next in line, you have
>to either have everything at the same retention or use the
>ALLOW_MULTIPLE_RETENTIONS.  You also can use the NO_STANDALONE_UNLOAD
>keyword to keep the tape from being ejected before it's full.
>
>-M
>
>-----Original Message-----
>From: Sen [mailto:discussion.groups AT gmx DOT net]
>Sent: Monday, October 06, 2003 7:39 AM
>To: Pearce, Andrew W.; 'Steve Dvorak'; netbackup-l; nbu-lserv;
>veritas-bu AT mailman.eng.auburn DOT edu
>Subject: Re: [Veritas-bu] tape usage
>
>
>i have 2 drives in the loader.
>1 job with 2 streams, mutiplexing set to 1
>any help?
>
>----- Original Message ----- 
>From: "Pearce, Andrew W." <apearce AT kforce DOT com>
>To: "'Steve Dvorak'" <sdvorak AT veritas DOT com>; "'Sen'"
><discussion.groups AT gmx DOT net>; "netbackup-l" <netbackup-l AT yahoogroups 
>DOT com>;
>"nbu-lserv" <nbu-lserv AT dsihost-srv01 DOT com>;
><veritas-bu AT mailman.eng.auburn DOT edu>
>Sent: Monday, October 06, 2003 7:42 PM
>Subject: RE: [Veritas-bu] tape usage
>
>
>  
>
>>How many tape drives to you have in you loader?
>>
>>If you have 4 drives and 4 or more jobs scheduled to fire at once (without
>>multiplexing) you will pull 4 tapes, one for each available drive.  If
>>    
>>
>this
>  
>
>>is the case, you could try (in order of personal Preference):
>>1. Grouping the jobs into 1 or 2 policies and change the "Limit Jobs Per
>>Policy" to 1 or 2 accordingly.
>>2. Staggering your schedule
>>3. Multiplexing if it is justified
>>4. Only allow 2 drives at a time for backup
>>
>>Andrew
>>-----Original Message-----
>>From: Steve Dvorak [mailto:sdvorak AT veritas DOT com]
>>Sent: Monday, October 06, 2003 12:07 AM
>>To: 'Sen'; netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
>>
>>Check out the "Allow multiple retensions" capability.
>>
>>Steve Dvorak
>>
>>-----Original Message-----
>>From: Sen [mailto:discussion.groups AT gmx DOT net]
>>Sent: Saturday, October 04, 2003 7:46 PM
>>To: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
>>Subject: [Veritas-bu] tape usage
>>
>>
>>hi,
>>I have a pool if 10 tapes which is configured for full backup. This backup
>>only requires 2 tapes, however, if there are 10 tapes in the library it
>>    
>>
>will
>  
>
>>use about 4 tapes.
>>
>>How can i force NB3.4 to continue appending data on those tapes which
>>    
>>
>still
>  
>
>>have free space before moving on the other new tapes ? thanks
>>
>>
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>>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
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>>_______________________________________________
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>>_______________________________________________
>>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
>>http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>>
>>
>>    
>>
>
>
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>
>  
>