HDD non-correctable sectors

[EnKo]

The SMART test of one HDD reported 45 non-correctable errors (errors which can not restored by ECC hardware) and 48 non-correctable sectors. May I can use the disc within an RAID and what is the impact?

 

[sretalla]

Non-correctable sectors usually indicate the beginning of the end for a disk... if you want to start using a disk with ZFS which is already failing, it's your choice, but I don't think anyone will recommend that you do it.

The impact is likely to be a disk failure in the near future.

Depending on your pool layout, that may or may not be a problem. (if it's in a stripe, your pool content is gone, if you have some redundancy in your VDEVs, maybe not a big problem, but may degrade your pool depending on how many other disks and the RAID type you chose)

Provided there's no other failing disk in the pool/VDEV and you have a redundant VDEV type, data may not be lost... it's your data, so you decide how much risk you want to take with it.

 

[EnKo]

Thank you, this answers my question. So there is no direct impact on validate data of the pool.

I already replaced the disc in my main system, but I am thinking about to use it for a temporary purpose within a RAID. Since I lost very recently a HDD of the same brand and type (SEAGATE IRONWOLF NAS) without any warning in advance, I have no much trust in this device anyway.