Hello, I happen to have a Linux Server mounted with BTRFS in RAID-1 and I would like someone more expert than me to be able to answer my questions.
It turns out that I have 3 HDD of 6TB each, in one of them every so often smartd detects me error in some sector. When it happens I use hdparm to read the same and, if it indicates me some type of error I use hdparm to overwrite that sector, re-read it and check that it no longer gives read error. The SMART Current Pending Sector value is reduced again to 0 and finally I scrub the BTRFS system to recover the lost information.
My question, do I have to worry about this record? (It is always the same in others does not happen to me). The disk is a WD Red NAS (the others are the same) and is still under warranty, could you process it with these symptoms or do you need more symptoms to do so?