Tivoli Header
Tivoli Space Manager for UNIX Using the Hierarchical Storage Management Clients
If you back up and migrate files to the same server, and backup
versions of your files exist, use the backup-archive client to restore your
stub files.
If you back up and migrate files to a different server and your
stub files are erased or corrupted, use the dsmmigundelete command
to recreate them.
- Note:
- When you use the dsmmigundelete command to recreate stub files for
migrated files, stub files are recreated for all eligible migrated files in
the file system that you specify. You cannot use this command to
recreate stub files for individual files or specific groups of files.
The dsmmigundelete command creates stub files for any
premigrated files for which an original file does not exist on your local file
system.
- Enter the dsmmigundelete command without the
expiring option if reconciliation was not run since the files were
deleted. The HSM client performs the following action for the file
system that you specify:
File
| Description
|
Migrated files
| Recreates a stub file for a migrated file if a corresponding stub file
does not exist on your local file system, and the migrated file was not marked
for expiration.
|
Premigrated files
| Creates a stub file for a premigrated file if a corresponding original
file does not exist on your local file system, and the premigrated file was
not marked for expiration.
|
- If you enter the dsmmigundelete command with the
expiring option, the HSM client performs the following action for
the file system that you specify:
File
| Description
|
Migrated files
| Recreates a stub file for a migrated file if a corresponding stub file
does not exist on your local file system, whether the migrated file was marked
for expiration or not.
|
Premigrated files
| Creates a stub file for a premigrated file if a corresponding original
file does not exist on your local file system, whether the premigrated file
was marked for expiration or not.
|
When you enter the dsmmigundelete command:
- The dsmmigundelete command creates a stub file containing the
necessary information to recall the corresponding file from storage. It
does not contain any leading bytes of data from the file.
- The recall mode that you previously set for a migrated file is not stored
in a recreated stub file. The recall mode for the file is set to
normal.
- If a directory path does not exist in your local file system for a
migrated or premigrated file, the HSM client does not create a stub file for
that file.
- A stub file is recreated with the name of the file at the time it was
migrated. If you rename a file after it is migrated, the file name is
not updated on the server.
- If you have more than one migrated file in storage with the same name that
is marked for expiration, a stub file is created again for the file with the
most recent modification time (mtime).
- If the name of a migrated or premigrated file in storage is the same as
the name of a file that currently resides on your local file system, the HSM
client replaces the file on your local file system with a stub file only if
the modification time for the migrated or premigrated file is newer than the
modification time for the file on your local file system.
- The HSM client can recreate a stub file for a migrated file, or create a
stub file for a premigrated file even if:
- The file was never backed up.
- The migrated or premigrated file resides on a different server other than
the server on which backup copies of the file reside.
- The file was migrated or premigrated after the last incremental
backup.
Attention: The dsmmigundelete command does not
support hardlinked files. If you attempt to recreate a stub file for a
hardlinked file, a stub file is not recreated unless all of the
files that are hardlinked together are deleted from your local file
system. When one file in a set of hardlinked files is migrated, all of
the hardlinked files in the set become stub files. When the
dsmmigundelete command recreates a stub file for a hardlinked file,
the stub file has the same name as the file that was originally
migrated. Stub files are not recreated for any other files that were
previously in the hardlinked set of files.
For more information about using the dsmmigundelete command, see
dsmmigundelete.
[ Top of Page | Previous Page | Next Page | Table of Contents | Index ]