Pool does not appear in GUI

[cjchap]

Hello, this is my first FreeNAS build. My main pool went offline a little over a week ago and I am trying to learn how to recover it properly.
I have two pools B1 which is ONLINE and accessible consisting of one 2TB HD and the second pool, the one I am having issues with, T123 which is also listed as ONLINE but inaccessible. T123 is a raidz1 consisting of 3 6TB HDs
Initially it would show up as "UNKNOWN". After doing some research in the user guide and forums I have gotten as fas as export/disconnecting the pool and then re-importing it in CLI. I appears as ONLINE in CLI but is still unavailable in the GUI. I ran a scrub on the pool last night and no known issues found. Any support would be GREATLY appreciated. I have a feeling this is a simple fix but I'm a noob.
Thank you!

FreeNAS-11.3-U4.1
Dell r710
H700 riad card
24gb RAM

 

[cjchap]

If there is any readouts that would be beneficial to solving this problem please let me know. I am using this as a teaching moment. Thank you in advance for any help!

 

[JaimieV]

If you export it again on the CLI, then in the GUI you can go to Storage, Pools, Add, Import an existing pool and it should get it into the GUI database again.

I want to make you aware that if you are using the H700 RAID card in RAID configuration for your disk connections, that is a bad plan. FreeNAS needs plain HBA-style disk connections, not going through a RAID card. You can see my setups in my sig, for example.