Got this worked out. The GUI would not allow me to re-run the "delete" command, but the CLI did, so I ran another "delete" against the pool and it's continuing the delete process now.
We have run out of spare disks, and due to continued disk failures, I need to delete a pool and make it smaller. Unfortunately, a drive failed during the drop operation, and it now appears stuck. It's been several hours with no progress. I have 90 drives in the pool, and I need to get the pool deleted ASAP in order to create several smaller Raid Groups, which have better flexability than a single large pool.  Pool Name:  Pool2 Pool ID:  2 Raid Type:  r_6 Percent Full Threshold:  70 Description: Disk Type:  Fibre Channel State:  Destroying Status:  OK(0x0) Current Operation:  Destroying Current Operation State:  Failed Current Operation Status:  The unbind operation has failed; the LUN may be private (0x40008053) Current Operation Percent Completed:  25 Raw Capacity (Blocks):  24670664832 Raw Capacity (GBs):  11763.890 User Capacity (Blocks):  13527456000 User Capacity (GBs):  6450.394 Consumed Capacity (Blocks):  0 Consumed Capacity (GBs):  0.000 Available Capacity (Blocks):  13527456000 Available Capacity (GBs):  6450.394 Percent Full:  0.000 Total Subscribed Capacity (Blocks):  0 Total Subscribed Capacity (GBs):  0.000 Percent Subscribed:  0.000 Oversubscribed by (Blocks):  0 Oversubscribed by (GBs):  0.000
CX4 pool stuck?