ARC0647I

Explanation
 During a volume backup, volume dump, or FREEVOL,
either an out-of-space condition was encountered on a migration level
1 volume when the VTOC copy data set was allocated or written, or
no migration level 1 volumes was added to this processing unit. Because DFSMShsm attempts
to select the migration level 1 volume with the most free space, DFSMShsm assumes
that none of the migration level 1 volumes have enough space. No further
volume backup or volume dumps are processed until action is taken
to correct this problem. For volume dump and volume backup, this message
is preceded by message ARC0704E or ARC0705I,
indicating which volume was being dumped or backed up when this error
was encountered.

System action
 The command or automatic function ends. DFSMShsm processing
continues.

Programmer response
 Migration level 1 space is required. Do
one of the following to free space on a migration level 1 volume:
 Issue an ADDVOL command to add another migration level 1 volume
to DFSMShsm
Issue a MIGRATE command to migrate level 1 data sets to level
2
Wait until automatic secondary space management runs level migration

 After this, release backup and dump with the RELEASE command.
Automatic backup or automatic dump restarts if they ended early because
of this condition and if the current time is still within their start
windows. A command to back up all primary volumes also restarts if
it ended early for this reason.

Source
 DFSMShsm