Pool Unavailable.

[Chris McDowell]

I am pretty certain I had the pool Main setup as a mirror between two 4TB drives. I cannot get it to import and just run off of the one drive. Seems as though the other died and is no longer showing up at all.

* Pool Main state is UNAVAIL: One or more devices are faulted in response to IO failures.
* Device: /dev/ada1, 8 Currently unreadable (pending) sectors
* Device: /dev/ada1, 8 Offline uncorrectable sectors

Current alerts:
* Device: /dev/ada1, 3224 Currently unreadable (pending) sectors
* Device: /dev/ada1, 3224 Offline uncorrectable sectors

Any ideas to get it to run off the one mirrored drive? How do I check to see what the pool style was?

 

[Heracles]

Well... according to the error message, it looks like your pool was made not of a single vDev with 2 drives, but from 2 vDev each with a single one.

ZFS would not return this error should you have only half a mirror. But it will if you are missing a complete vDev. It did found the drive you plugged in and successfully loaded it. Unfortunately, that one is not enough. So it means it is not half a mirror...

How can you be so sure that you had a single vDev and not 2 ?