While on the subject of subfile backup.... something I ran into recently
was an issue related to fragmentation. If your files are heavily
fragmented, then even small changes can result in a good chunk of the file
being backed up again. So just a thought to keep those disks defragged...

Regards,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Development
Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com

IBM Tivoli Storage Manager support web page:
http://www.ibm.com/software/sysmgmt/products/support/IBMTivoliStorageManager.html

The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.

"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 10/18/2006
06:22:39 PM:

> Yep, no problem.  You can experiment without doing any harm.
>
> Read the sections in the Windows client manual about subfile backup.
> Note the limitations - doesn't do files larger than 2 GB, for example.
> And note you can include/exclude just specific directories if you want.
>
> Then add the SUBFILE parms to your dsm.opt on the client.
> ANd remember that there is a server option that has to be turned on
> to ALLOW the subfile backups to occur.
>
> The first time the client backs up, you will get NO benefit from
> subfile backup, because the first backup has to it create the BASE
> file in the cache subdirectory on the client, and send that version
> to the server.
> On subsequent backups, if any of the cached files change, it will do
> a subfile incremental of those files.
>
> If you want to stop doing the subfile backup, just change in dsm.opt to
> SUBFILE NO.
>
> Even if you have SUBFILE NO, you can do restores of the files you
> backed up using SUBFILE, it just won't do partial/subfile backups any
more.
>
> Works like a charm!
>
>
>
>
>
>
> ________________________________
>
> From: ADSM: Dist Stor Manager on behalf of Dennis, Melburn IT7
> Sent: Wed 10/18/2006 3:56 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Switching between standard and subfile backups
>
>
>
> Is it possible to go from doing a standard incremental backup on a TSM
> client to a subfile backup?  I want to test to see if by turning subfile
> backups, a remote site will be able to complete its backups that way.
> Also, can I go back to a standard backup if I am not happy with the
> subfile?
>
>
> Mel Dennis
> Backup Systems Engineer
> Siemens Business Services
> 4400 Alafaya Trail
> Orlando, FL 32826
> MC Q1-108
> Tel:  (407) 736-2360
> Win:  439-2360
> Fax: (407) 243-0260
> Email:  melburn.dennis AT siemens DOT com