On Sat, Sep 1, 2018 at 1:03 AM, Pierre Couderc <pie...@couderc.eu> wrote: > > > On 08/31/2018 08:52 PM, Chris Murphy wrote: >> >> >> Bad sector which is failing write. This is fatal, there isn't anything >> the block layer or Btrfs (or ext4 or XFS) can do about it. Well, >> ext234 do have an option to scan for bad sectors and create a bad >> sector map which then can be used at mkfs time, and ext234 will avoid >> using those sectors. And also the md driver has a bad sector option >> for the same, and does remapping. But XFS and Btrfs don't do that. >> >> If the drive is under warranty, get it swapped out, this is definitely >> a warranty covered problem. >> >> >> >> > Thank you very much. > > Once upon a time...(I am old), there were lists of bad sectors, and the > software did avoid wrting in them. It seems to have disappeared. For which > reason ? Maybe because these errors occur so rarely, that it is not worth > the trouble ?
For > 10 years drive firmware handles bad sector remapping internally. It remaps the sector logical address to a reserve physical sector. NTFS and ext[234] have a means of accepting a list of bad sectors, and will avoid using them. Btrfs doesn't. But also ZFS, XFS, APFS, HFS+ and I think even FAT, lack this capability. I'm not aware of any file system that once had bad sector tracking, that has since dropped the capability. -- Chris Murphy
