Scott,

   Had to read the NBU Data Center Admin Guide (Pg. 30) and the SSO 
guide (Pg. 58) about 5 times to figure this out. According to what I 
understood, you and others are right.

 From Admin Guide: -
Using "on-demand":
Specifies whether the storage unit is available only on demand (that is, 
only when a class
or schedule is explicitly configured to use this storage unit). Clear 
the box (default), to
make the storage unit available to any class or schedule.

But you confused me with the the MUST_USE_LOCAL_DRIVE parameter.

 From SSO Guide: -
In NetBackup Release 3.4 and Later
The MUST_USE_LOCAL_DRIVE parameter was introduced to make directing a 
server to
use its own drives much easier. By adding this option, a backup of a SAN 
media server
(see page 57) will send the data over the SAN to a local drive.

So I guess what you described pertains to 3.2. With 3.4, all you need to 
do is have that parameter in bp.conf and the server will back up locally.
If this is true, all we need to do is use this parameter in bp.conf. 
This eliminates the need for a separate STU, eliminates the need for a 
separate class, and I don't have to worry about the SAN server (which 
has about 80G of data) backing up other clients. 

Am I making sense?

Thanks very much.
Prasad.


scott.kendall AT abbott DOT com wrote:

> I don't think the product is smart enough to tell the difference between a SAN
> media server and a normal media server.  I think it's just a licensing thing.
> 
> If you don't make the STU for the SAN media server "on-demand" it will be used
> by clients.
> 
> You also have to put the SAN media server in a class where the STU is
> specifically used instead of "any available".  This is true even if you are
> forcing media servers to use themselves ("must use local drive").  If you have
> this option on and have the STU configured as "on-demand" and don't specify
> the STU (i.e. leave "any available") the backup will remain queued until the
> window ends and then it will fail.
> 
> 
> - Scott
> 
> 
> 
>                                                                               
>                                                      
>                     Prasad Chalikonda                                         
>                                                      
>                     <prasadchalikonda AT yahoo DOT com>         To:     
> veritas-bu <veritas-bu AT mailman.eng.auburn DOT edu>                    
>                     Sent by:                             cc:                  
>                                                      
>                     veritas-bu-admin AT mailman DOT eng.        Subject:     
> [Veritas-bu] STU usage with SSO                              
>                     auburn.edu                                                
>                                                      
>                                                                               
>                                                      
>                                                                               
>                                                      
>                     11/28/2001 09:09 AM                                       
>                                                      
>                                                                               
>                                                      
>                                                                               
>                                                      
> 
> 
> 
> 
> Hello,
> 
>    My current config:
> 
> Master server  - 1
> Regular Media - 4 (4 STU's defined)
> San Media       - 1 (1 STU defined - to be used by the SAN Media server
> only)
> Clients             - 10
> 
> I understand STU's are picked alphabetically. So if I have a class with
> 10 clients, and use ANY_AVAILABLE, is NetBackup smart enough to ignore a
> SAN Media STU and pick only one of the regular Media STU's
> alphabetically? If not, how do I restrict the SAN Media STU from being
> selected?
> 
> 
> Thanks very much.
> Prasad.
> 
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 
> 
> 
> 
>