I have an IBM SAN in production.
the whole enclosure is fully populated with drives already.
a couple of disk groups created (RAID5), multiple LUNs are presented to targets.
One of the LUNs are running out of space and I do not have any available space in that disk group.
from another disk group, I have 500GB of unassigned space.
is there any way that I can "de-obligate" that 500GB space from disk group A (RAID5)
and use that to extend the other RAID group and present to a LUN in that group?