Can't disconnect pool with single failed drive

[Teeps]

Hello,
FreeNAS: 11.3-U3

I made a single-drive pool when I was young and foolish ;) and it finally died. I saw it coming and migrated everything off it recently, except for my crashplan ubuntu VM.
The disk has failed but the VM is still running and refuses to stop.
The disk is no longer present in the Disks menu
When I clicked disconnect on the pool, the web gui just spins
I ran sudo zpool export intel480ssd on CLI but it sits there, never completing.
While that CLI command is hung, now the web gui can't load pools at all (similarly zpool status -v hangs once it gets to the bad drive)

I assume a reboot will clear up most of this, but figured I'd ask if there are more steps I should be taking before I reboot.

Kill the VM process from CLI? zpool destroy -f?

Thanks for any insight

Here are the most recent dmesg entries showing the drive fail:

Code:

(da7:mps0:0:9:0): CAM status: SCSI Status Error
(da7:mps0:0:9:0): SCSI status: Check Condition
(da7:mps0:0:9:0): SCSI sense: NOT READY asc:4,0 (Logical unit not ready, cause not reportable)
(da7:mps0:0:9:0): Error 5, Retries exhausted
mps0: mpssas_prepare_remove: Sending reset for target ID 9
da7 at mps0 bus 0 scbus0 target 9 lun 0
da7: <ATA INTEL SSDSC2KW48 036C> s/n BTLT70860089480EGN   detached
GEOM_MIRROR: Device swap0: provider da7p1 disconnected.
(da7:mps0:0:9:0): Periph destroyed
mps0: Unfreezing devq for target ID 9
GEOM_ELI: Device mirror/swap0.eli destroyed.
GEOM_MIRROR: Device swap0: provider destroyed.
GEOM_MIRROR: Device swap0 destroyed.

middlewared.log

Code:

[2021/04/25 14:59:12] (DEBUG) ZFSPoolService.get_disks():194 - Could not find disk for gptid/f5ea0357-14cf-11ea-afb6-002590f34f60
[2021/04/25 15:10:52] (ERROR) libzfs.<listcomp>():432 - Failed to retrieve root dataset handle for intel480ssd: pool I/O is currently suspended
[2021/04/25 15:14:15] (ERROR) libzfs.query():491 - Failed to retrieve root dataset handle for intel480ssd: pool I/O is currently suspended
[2021/04/25 15:15:52] (ERROR) libzfs.<listcomp>():432 - Failed to retrieve root dataset handle for intel480ssd: pool I/O is currently suspended
[2021/04/25 15:25:52] (ERROR) libzfs.<listcomp>():432 - Failed to retrieve root dataset handle for intel480ssd: pool I/O is currently suspended