I am building a small NAS(Truenas Scale) and added four used 4TB WD BLACK HDD.
Using this card from Ebay : Supermicro AOC-S3008L LSI SAS3008 12Gbps SAS HBA IT mode ZFS FreeNAS unRAID https://www.ebay.com/itm/133574430584
I ran a long test on all four drives and I see this error on top right and Success under test results, what do I make out of this?
Is the disk good to use?
Do Truenas long tests run in parallel or sequentially?
Smarttests are run on each drive seperately. So if you configure 3 drives with a long test then all three drives will run the long test at the same time.
I personally would run a destructive badblocks on /dev/sdc and see what transpires. However, be prepared to replace that drive