Replacing an original with an alternate tape volume

If an original ML2 or backup volume is lost or damaged, the volume can be replaced with its alternate volume:

1. To determine if an alternate tape volume exists for the original volume, use the LIST TTOC(volser) command.
2. Issue the TAPEREPL ORIGINALVOLUMES(ovol) command to replace the original volume with the alternate. After the command completes, the alternate tape volume reference in the TTOC record replaces the original volume reference.
3. Issue the TAPECOPY ORIGINALVOLUMES(newovol) command to make a new copy of the volume (using the volume serial number of the old alternate volume) to provide a new alternate volume.

When the TAPEREPL command successfully replaces a tape volume, DFSMShsm issues the ARC0427I message and (with two exceptions) invokes the tape-volume exit ARCTVEXT to indicate to a tape management product that the original volume can be returned to scratch. The two exceptions are when you are using TAPEREPL with the DISASTERALTERNATEVOLUME optional subparameter, or when your tape management product is DFSMSrmm.

For duplex tapes, after the original volume is replaced, it is marked full and is no longer a duplex tape.