To prepare a volume for activity by initializing it, use the Device Support Facilities (ICKDSF) utility to build the VTOC. You can create a VTOC index when initializing a volume by using the ICKDSF INIT command and specifying the INDEX keyword.

To convert a non-indexed VTOC to an indexed VTOC, use the BUILDIX command with the IXVTOC keyword. The reverse operation can be performed by using the BUILDIX command and specifying the OSVTOC keyword.

To refresh a volume VTOC and INDEX in its current format, use the ICKDSF command REFORMAT with the RVTOC keyword. To optionally extend the VTOC and INDEX, use the ICKDSF command REFORMAT with the EXTVTOC and EXTINDEX keywords.

See Device Support Facilities (ICKDSF) User's Guide and Reference for details.