On 09/03/2018 05:15 AM, Chris Murphy wrote:
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.
Thank you, you are very clear.
