Hi.I have a RAID5 using 4 drives in a HO Proliant G8 Microserver
I got a Proxmox installed and the disks for RAID are associated with a
specific VM with Debian 9. It worked like a charm.
But, some days ago i broke a proccess giving some permissions (sudo
chmod....) to some folders into of the mounted /dev/md0. Then after
restart the VM the RAID din't mount again. The raid contents very
important data for me, so i'm not very sure what to do in order don't
lose the data. So, i´m getting bit panic.
I need some guide to rebuild the system without losing the content.
mdadm version is 3.4-4+b1
This is the result of the fdisk -l related with the RAID
root@grafico:/# fdisk -l
Disco /dev/sdb: 931,5 GiB, 1000204886016 bytes, 1953525168 sectores
Unidades: sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico/físico): 512 bytes / 512 bytes
Tamaño de E/S (mínimo/óptimo): 512 bytes / 512 bytes
Tipo de etiqueta de disco: dos
Identificador del disco: 0x087383f0
Disposit. Inicio Comienzo Final Sectores Tamaño Id Tipo
/dev/sdb1 2048 1953523711 1953521664 931,5G fd Linux raid
autodetect
Disco /dev/sdd: 931,5 GiB, 1000204886016 bytes, 1953525168 sectores
Unidades: sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico/físico): 512 bytes / 512 bytes
Tamaño de E/S (mínimo/óptimo): 512 bytes / 512 bytes
Tipo de etiqueta de disco: dos
Identificador del disco: 0x8b48be4a
Disposit. Inicio Comienzo Final Sectores Tamaño Id Tipo
/dev/sdd1 2048 1953523711 1953521664 931,5G fd Linux raid
autodetect
Disco /dev/sdc: 931,5 GiB, 1000204886016 bytes, 1953525168 sectores
Unidades: sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico/físico): 512 bytes / 512 bytes
Tamaño de E/S (mínimo/óptimo): 512 bytes / 512 bytes
Tipo de etiqueta de disco: dos
Identificador del disco: 0x87ea0d19
Disposit. Inicio Comienzo Final Sectores Tamaño Id Tipo
/dev/sdc1 2048 1953523711 1953521664 931,5G fd Linux raid
autodetect
Disco /dev/sde: 931,5 GiB, 1000204886016 bytes, 1953525168 sectores
Unidades: sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico/físico): 512 bytes / 512 bytes
Tamaño de E/S (mínimo/óptimo): 512 bytes / 512 bytes
Tipo de etiqueta de disco: dos
Identificador del disco: 0xa69b0d7f
Disposit. Inicio Comienzo Final Sectores Tamaño Id Tipo
/dev/sde1 2048 1953523711 1953521664 931,5G fd Linux raid
autodetect
Disco /dev/md0: 2,7 TiB, 3000206622720 bytes, 5859778560 sectores
Unidades: sectores de 1 * 512 = 512 bytes
Tamaño de sector (lógico/físico): 512 bytes / 512 bytes
Tamaño de E/S (mínimo/óptimo): 524288 bytes / 1572864 bytes
Tipo de etiqueta de disco: gpt
Identificador del disco: A87C8BBF-5876-4FA6-83F6-46DAF1BDCF75
Disposit. Comienzo Final Sectores Tamaño Tipo
/dev/md0p1 2048 5859776511 5859774464 2,7T Sistema de ficheros de Linux
And here some more information (as you can see the /dev/sde drive have
some bad blocks)
root@grafico:/# mdadm --examine /dev/sdb
/dev/sdb:
MBR Magic : aa55
Partition[0] : 1953521664 sectors at 2048 (type fd)
root@grafico:/# mdadm --examine /dev/sdc
/dev/sdc:
MBR Magic : aa55
Partition[0] : 1953521664 sectors at 2048 (type fd)
root@grafico:/# mdadm --examine /dev/sdd
/dev/sdd:
MBR Magic : aa55
Partition[0] : 1953521664 sectors at 2048 (type fd)
root@grafico:/# mdadm --examine /dev/sde
/dev/sde:
MBR Magic : aa55
Partition[0] : 1953521664 sectors at 2048 (type fd)
root@grafico:/# mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 0b44a3b8:83eafabc:644afc87:bdb5b1f3
Name : servidor:0
Creation Time : Sat Aug 5 23:10:50 2017
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB)
Array Size : 2929889280 (2794.16 GiB 3000.21 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : ddc94c8e:aab339df:2233112a:5c938bab
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Sep 19 01:36:51 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 626e25ae - correct
Events : 3106
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@grafico:/# mdadm --examine /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 0b44a3b8:83eafabc:644afc87:bdb5b1f3
Name : servidor:0
Creation Time : Sat Aug 5 23:10:50 2017
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB)
Array Size : 2929889280 (2794.16 GiB 3000.21 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 32271db0:38a5220c:c19968af:8fe1a3fb
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Sep 19 01:36:51 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 86971d3c - correct
Events : 3106
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@grafico:/# mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 0b44a3b8:83eafabc:644afc87:bdb5b1f3
Name : servidor:0
Creation Time : Sat Aug 5 23:10:50 2017
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB)
Array Size : 2929889280 (2794.16 GiB 3000.21 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : 9014cf8b:ea7e22e2:9274be9d:9aeee689
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Sep 19 01:36:51 2017
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : b4e1cc29 - correct
Events : 3106
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 2
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@grafico:/# mdadm --examine /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x9
Array UUID : 0b44a3b8:83eafabc:644afc87:bdb5b1f3
Name : servidor:0
Creation Time : Sat Aug 5 23:10:50 2017
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB)
Array Size : 2929889280 (2794.16 GiB 3000.21 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262056 sectors, after=0 sectors
State : clean
Device UUID : f95affb4:138bca63:d10df091:1f20af37
Internal Bitmap : 8 sectors from superblock
Update Time : Tue Sep 19 01:36:51 2017
Bad Block Log : 512 entries available at offset 72 sectors - bad
blocks present.
Checksum : 1b3e988 - correct
Events : 3106
Layout : left-symmetric
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@grafico:/# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Aug 5 23:10:50 2017
Raid Level : raid5
Array Size : 2929889280 (2794.16 GiB 3000.21 GB)
Used Dev Size : 976629760 (931.39 GiB 1000.07 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue Sep 19 01:36:51 2017
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : servidor:0
UUID : 0b44a3b8:83eafabc:644afc87:bdb5b1f3
Events : 3106
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
3 8 65 3 active sync /dev/sde1
root@grafico:/# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0]
[raid1] [raid10]
md0 : active (auto-read-only) raid5 sdb1[0] sde1[3] sdc1[1] sdd1[2]
2929889280 blocks super 1.2 level 5, 512k chunk, algorithm 2
[4/4] [UUUU]
bitmap: 0/8 pages [0KB], 65536KB chunk
Joseba Ibarra
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