There are two RAIDZ pools present in the GPU. To list these, type

zpool status

This will list the two pools. The first pool “data” consists of 4x12TB hard drives arranged in a single pool. The second pool consists of 3x20TB hard drives and is labeled “data20”. If any errors occur or are identified, use smartctl to understand them.

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First go into superuser mode

sudo su

Type in the password, and then you’re good to go. Type the following in to understand what’s happening with /sdg.

smartctl -a /dev/sdg

This will pull up smartctl of that particular drive. It will look like the following:

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Continue to check the remaining disks for problems. If none persist, run a short test.

smartctl --test=short /dev/sdg

Repeat the smartctl -a to examine results. If none persist, run a longer test.

smartctl --test=long /dev/sdg

If you are confident the pool is in good health, clear the errors