Hi Roman,
Thanks for the reply and the correction on the "dd" command.
- ext4 is in the kernel as the fs wouldn't mount otherwise and the
tools are the latest ones ( e2fsprogs 1.42.10 )
root@nas3:/# fsck.ext4 -V
e2fsck 1.42.10 (18-May-2014)
Using EXT2FS Library version 1.42.10, 18-May-2014
- Doing the correct "dd" command ( dd if=/dev/md0 of=teste.txt
skip=458227712 count=16 bs=4096 ) will net the same dmesg errors and a
0 bytes file.
dd: reading `/dev/md0': Input/output error
0+0 records in
0+0 records out
0 bytes (0 B) copied, 0.000268007 s, 0.0 kB/s
[88623.524481] Buffer I/O error on device md0, logical block 458227712
- I'm sure this is not a filesystem problem, but something fishy
with dm. As all disks are active and synced if one would have bad
sectors dm should read the sector from another one, but aparently it
is not doing that.
Cheers
Pedro
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