DOCUMENTATION: Images written to a Disk Storage Unit are deleted when the expiration date is reached and can no longer be imported

Article:TECH17245  |  Created: 2007-01-13  |  Updated: 2013-10-23  |  Article URL http://www.symantec.com/docs/TECH17245
Article Type
Technical Solution


Environment

Issue



DOCUMENTATION: Images written to a Disk Storage Unit are deleted when the expiration date is reached and can no longer be imported

Solution



Manual:
Veritas NetBackup (tm) 5.0 System Administrator's Guide, Volume 1 for Windows, Page: 249
Veritas NetBackup (tm) 5.0 System Administrator's Guide, Volume 1 for UNIX, Page: 247


Modification Type: Addition


Modification:
When a backup is written to a Disk Storage Unit (DSU), the image tar file containing the backup data is written to the directory specified in the disk storage unit configuration.  The backup image is given a file name in the format of <backupid>_C1_F1.  "C#" and "F#" reflect the copy number and the fragment number.  When this image passes its expiration date, not only are the catalog image header and ".f" file for the backup deleted, but the image tar file is deleted from the directory as well.  This is normal behavior for NetBackup and helps to reclaim space on the DSU after the images have been expired.  Once these backup images have been deleted, the images are unrecoverable.  An import of these images is not possible as this is the equivalent of physically erasing a backup from tape.

The catalog information cannot be imported from images written to disk storage units. This is because the bpimport command requires the media ID of a tape as part of the command.  Since there is no media ID for images written to disk storage units, an import cannot be run.  Even if a backup of the directory containing the images written to the disk storage unit is available, it can only be used to restore the image file itself. Without the associated catalog information, restoration of data from the image is not possible.  Details about the bpimport command may be obtained by viewing the help files included with NetBackup.




Legacy ID



242264


Article URL http://www.symantec.com/docs/TECH17245


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