Moin!
May I ask a question on this list, or is this strictly for development?
Thanks,
Stephan
My qustion is how to translate sector numbers from a RAID6 as in
> Aug 2 01:32:28 falbala kernel: md8: mismatch sector in range 1460408-1460416
to ext4 inode numbers, as in
> debugfs: icheck 730227 730355 730483 730611
> Block Inode number
> 730227 30474245
> 730355 30474245
> 730483 30474245
> 730611 30474245
Is there a list, channel, matrix room for this kind of questions?
Are there tools to do what I need?
Is the approach below sensible?
It is a RAID6 with six drives, one of them failed.
A check yielded 378 such mismatches.
I assume the sectors count from the start of the `Data Offset`.
`ext4 block numbers` count from the start of the partition?
Is that correct?
The failed drive has >3000 unreadble sectors and became very slow.
#! /usr/bin/gawk -f
BEGIN {
SS = 512
CS = 0x80000/SS
BS = 4096/SS
N = 4
}
/mismatch sector in range/ {
split($11,A,/-/);
S = A[1];
M = S%CS;
C = S/CS;
B = (C*N*CS + M)/BS
printf "icheck"
for (i=0; i<N; i++) printf " %u", B + i*CS/BS
printf "\n"
}
/dev/sda3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=0 sectors
State : clean
Device UUID : 16ee808f:9cf5420e:270cc442:db7768b6
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 09:27:57 2021
Bad Block Log : 512 entries available at offset 24 sectors
Checksum : 2b557999 - correct
Events : 405815
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 28c5ded0:c005aaf2:167d3af3:8714b48c
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 09:27:57 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : d7dc6e93 - correct
Events : 405815
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 1e9be3ef:f6f44ef4:cd4c39d4:002b515c
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 09:27:57 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : a92219f4 - correct
Events : 405815
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 5
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : active
Device UUID : e85da470:24a385b8:ae66eacd:d822539d
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 01:24:06 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 28d023be - correct
Events : 400427
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sde3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 48223f81:5c9a0ddd:ff0d1782:57941c27
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 09:27:57 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 9be57126 - correct
Events : 405815
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 4
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdf3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : d58e68a2:7d9e9218:1bb61653:c295ae02
Name : falbala:8 (local to host falbala)
Creation Time : Wed Aug 20 12:23:51 2014
Raid Level : raid6
Raid Devices : 6
Avail Dev Size : 5440837632 (2594.39 GiB 2785.71 GB)
Array Size : 10881675264 (10377.57 GiB 11142.84 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 881ee37d:810e582a:bc0d4841:27916f6b
Internal Bitmap : 8 sectors from superblock
Update Time : Mon Aug 2 09:27:57 2021
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : e957ddfe - correct
Events : 405815
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAA.AA ('A' == active, '.' == missing, 'R' == replacing)
--
Stephan
