11.1 Important Steps to Take When Moving Any VOB

Although the procedures described in this section differ in various ways, the following steps should be considered when moving any VOB.

• Unless you are moving a VOB between UNIX and Windows, or from one Windows domain to another, make sure that the ownership and access control information for the VOB storage directory is preserved when the directory is copied. Not all file system copy utilities-especially on Windows-preserve this information. If this information is changed during the copy step of the VOB move procedure, the VOB will not be usable in its new location until the protections are corrected. Rational ClearCase provides several programs that can correct damaged file system protections if necessary. See Chapter 20, Repairing VOB and View Storage Directory ACLs on Windows for more information on this topic.

• All of the VOB move procedures described in this chapter preserve the original VOB storage directory. After you are sure that the VOB can be accessed at its new location, delete the old VOB storage directory to free the storage it would otherwise consume.

• If VOB database snapshot backups are enabled for the VOB, use the vob_snapshot_setup program to disable them before you begin the move, and enable them again after the move is complete.

• Optionally, scrub the VOB's cleartext pools before moving the VOB. This reduces the size of the VOB storage directory.

CAUTION: Never register more than one copy of a VOB in a ClearCase registry. Although the procedures described in this chapter copy the VOB storage directory, none of them registers the copy before the original has been unregistered. If more than one copy of a VOB is registered in the same registry, even if they have tags in separate regions, severe ClearCase errors, including potential data loss, will occur.