I believe you have answered your own question.

The only difference btn the DSSU is, this DSSU is 250GB of Size and only 9GB free space is there. The low water level mark is 80%. In this DSSU, it is not doing the staging to tape also.


http://seer.support.veritas.com/docs/283400.htm

Did you do any recent tweaks before having issues with this DSSU, was the failing one ever working?

What is it that you want to do, free up disk space?


There are several methods that can be used to reclaim disk space on a disk storage unit. Options such as, but not limited to, expiring older images, using an alternate storage unit, changing the retention level used and adding more disk space to the disk storage unit.

Expire older images from the disk storage unit to reclaim disk space on the file system.
1. Go to the Catalog section of the NetBackup Administration Console.
2. Select Pathname: and enter the disk path to the disk storage unit.
3. Enter the appropriate Date/Time Range for which to search for images to expire.
4. Click the Search Now button and a list of images in the disk storage unit will be displayed.
5. Select any backup id's that can be expired and then select Actions > Expire from the menu.
The highlighted backup id's will be expired and the disk space will be reclaimed on the file system.

Use a different disk storage unit for the backup.
1. Go to the Policies section of the NetBackup Administration Console.
2. Open the Attributes for the policy that failed with a Status 129.
3. Select a new storage unit from the "Policy storage unit:" drop down.
Once a new storage unit has been selected, manually run the backup or wait for the next scheduled backup to run. The next backup of the policy will use a different storage unit. The policy can be set to use the original storage unit, once disk space is available on the file system for the disk storage unit.

If the status 129 keeps reoccurring, select a smaller retention level for backups, or increase the size of the file system being used for the disk storage unit.

http://seer.entsupport.symantec.com/docs/280005.htm

More recommendations can be found on page 194 of: http://ftp.support.veritas.com/pub/support/product...

Hi,

Thanks for the answer.

Best Regards
Navadeepan