ORA-59332
Number of disks that can be added to a disk group is limited to %0!s disks if disk group is nearly full.
Cause
Disk group did not have enough space for the metadata needed to accommodate the number of disks being added at once.
Action
Reduce the number of disks that is being added with the initial ADD DISK or ADD FAILGROUP command. After the initial ADD DISK or ADD FAILGROUP command successfully executes, more disks may be added once the disk group has the space to do so with the new space it has acquired.