Hi. I am new to UnRaid and use an array without parity for easily replaceable Linux ISOs and a ZFS mirrored pool for the actually important stuff. I can run SMART short tests on all drives but I can't run an extended test without turning off spindown delay.

I'm surprised there seems to be no tool to automate regular short / long tests and to turn off and then restore spindown delay. Am I missing a way to do this?

There inst at the moment, up until recently most people had the main data on the array, and a parity check was the same as an extended SMART test, but now with many users having large zfs pools, there is a need for scheduled SMART tests, including taking care of spin down for the texts to run, hopefully that will be implemented soon.