And usually not only 1-2 new bad sectors detected, their number can easily jump - and in most cases, with 1000's bad sectors (even if there may be room in the spare area) the hard disk usually become unusable.A screen will pop up with your new drive sitting proudly on the left hand side. An extra layer of prevention Other than running S. They probably are still being used, synology is just giving a warning that they're going bad.So if “Disk 2” failed, then it’s the second hard drive from the left.(Bad sector and an I/O error) But looking at the device health in the status it says that everything is OK I have 4 Seagate 2TB Laptop HDD SATA III 2.Synology replace drive with bad sectors Answer (1 of 14): There could possibly be others using drives with bad sectors on the drive, and don’t even know it.
