How backup versions are managed in TSM Fastback Workstation


Tivoli Storage Manager FastBack for Workstations stores many backup copies in the native file format. You can restore the backup copies by using native file system commands. Some backup copies are created using sub-file copy, compression, or encryption. These must be restored with the Tivoli Storage Manager FastBack for Workstations client.

Tivoli Storage Manager FastBack for Workstations keeps most backup copies in the same format as the original file. Tivoli Storage Manager FastBack for Workstations provides tools and views to see the backup copies to restore them. However, in many cases it is not necessary to use Tivoli Storage Manager FastBack for Workstations to restore those backup copies. These files have contents exactly like the originals, in a directory tree structure that simulates the original tree.


Some backup copies are not in the same format as the original files, and must be restored using Tivoli Storage Manager FastBack for Workstations, such as 
  •     Backup copies stored on Tivoli Storage Manager server
  •     Backup copies that were encrypted
  •     Backup copies that were compressed
  •     Large files that were backed up with subfile copy. In the storage area, the subfile copies have -FPdelta file name suffix.
  •     Versions of bitmap backups. In the storage area, these backup copies have -TPdelta file name suffix.

Tivoli Storage Manager FastBack for Workstations backup versions

As you change a file, Tivoli Storage Manager FastBack for Workstations keeps backup copies of each version of the original file.


To track versions of a file, Tivoli Storage Manager FastBack for Workstations adds a version suffix to the file name of the backup copy. On the local storage area, all backup copies contain a version suffix. On the remote storage area, all backup copies (except the most recent backup copy) contain a version suffix. When a file is deleted on your computer, Tivoli Storage Manager FastBack for Workstations adds a version identifier to the file name of the most recent backup copy on the remote storage area.

Also Read: Storage Area Network (SAN) Basic Free Tutorials

The version suffix is "-FP" followed by a number. For example, a file named data.xls could be stored as versioned backup copy data.xls-FP1168376676.xls.

The most recent backup copy of a file is the “active” backup copy. Older backup copies of that file are “inactive” backup copies. If storage space is approaching the limit, Tivoli Storage Manager FastBack for Workstations will delete inactive backup copies of a file before deleting active backup copies.

A file that is protected by schedule could change several times during the schedule interval. Only the last version of the file prior to the end of the schedule will be backed up. A continuously protected file is backed up after every saved change.

Modifying backup copies

If you move or modify backup copies with native file system tools, the client ceases to function correctly and is not supported.

You can use native file system tools to copy backup copies to restore your original files. Do not use native file system tools to modify backup copies. Use native file system tools to remove backup copies only if you uninstall the client.




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