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Tivoli Storage Manager for UNIX Backup-Archive Clients Installation and User's Guide


Understanding Potential Backup Problems Caused by Mount Points

Mount points are UNIX symbolic links with special syntax. They can cause problems for a backup program that crosses the tree formed with these mount points. For example, user foo creates an AFS mount point for the user.foo volume in his home directory. User foo also forms a cycle in the directory tree. The backup program enters an infinite loop that looks like this:

   /afs/xyz-cell/u/foo
   /afs/xyz-cell/u/foo/foo
   /afs/xyz-cell/u/foo/foo/foo

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User foo can also create a mount point for a root volume of a foreign cell. This expands the subdirectory of user foo to include a tree that would be unimportant to back up.

With DFS, you can create loops by adding DFS fileset mount points in different ways. You also can create a mount point for a root fileset of a foreign cell. This action expands your subdirectory to include a large tree that would be unimportant to back up.

With AFS, you can add volume mount points in any directory where you have write access. The command for performing this task is the AFS fs mkmount command.

With DFS, you can add fileset mount points in any directory where you have write access. The command for performing this task is the DFS fts crmount command.

The following options address these problems:


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