I have a dedicated hardware nas that runs a self maintained debian 10.
before the hardware disk problem (before/after)
sda : system disk OK/OK no raid
sdb : first disk of the raid10 array OK/OK
sdc : second disk of the raid10 array OK/OK
sdd : third disk of the raid10 array OK/KO
sde : fourth disk of the raid10 array OK/OK but is now sdd
sdf : spare disk for the array is now sde
After the failure the BIOS does not detect the original third disk. Disk
are renamed and I think sde has become sdd and sdf -> sde
Below are more detailed info. Feel free to ask for other things as I can
log into the machine via ssh
So I have several questions :
1) How to I repair the raid10 array using the spare disk without
replacing the faulty one immediately?
2) What should I do once I receive the new disk (hopefully soon)
3) Is there a way to use persistent naming for disk array?
Sorry to annoy you but my kid wants to see a film on the nas and annoys
me badly. And I prefer to ask rather than doing mistakes.
Thanks for any
mdadm --examine /dev/sdb
/dev/sdb:
MBR Magic : aa55
Partition[0] : 4294967295 sectors at 1 (type ee)
root@nas2:~# mdadm --examine /dev/sdb
/dev/sdb:
MBR Magic : aa55
Partition[0] : 4294967295 sectors at 1 (type ee)
root@nas2:~# mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6abe1f20:90c629de:fadd8dc0:ca14c928
Name : nas2:0 (local to host nas2)
Creation Time : Wed Jun 20 23:56:59 2012
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 5860268943 (2794.39 GiB 3000.46 GB)
Array Size : 5860268032 (5588.79 GiB 6000.91 GB)
Used Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=911 sectors
State : clean
Device UUID : ce9d878a:37a4f3a3:936bd905:c4ed9970
Update Time : Wed May 8 11:39:40 2019
Checksum : cf841c9f - correct
Events : 1193
Layout : near=2
Chunk Size : 512K
Device Role : Active device 0
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@nas2:~# mdadm --examine /dev/sdc
/dev/sdc:
MBR Magic : aa55
Partition[0] : 4294967295 sectors at 1 (type ee)
root@nas2:~# mdadm --examine /dev/sdc1
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6abe1f20:90c629de:fadd8dc0:ca14c928
Name : nas2:0 (local to host nas2)
Creation Time : Wed Jun 20 23:56:59 2012
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 5860268943 (2794.39 GiB 3000.46 GB)
Array Size : 5860268032 (5588.79 GiB 6000.91 GB)
Used Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=911 sectors
State : clean
Device UUID : 8c89bdf8:4f3f8ace:c15b5634:7a874071
Update Time : Wed May 8 11:39:40 2019
Checksum : 97744edb - correct
Events : 1193
Layout : near=2
Chunk Size : 512K
Device Role : Active device 1
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@nas2:~# mdadm --examine /dev/sdd
/dev/sdd:
MBR Magic : aa55
Partition[0] : 4294967295 sectors at 1 (type ee)
root@nas2:~# mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6abe1f20:90c629de:fadd8dc0:ca14c928
Name : nas2:0 (local to host nas2)
Creation Time : Wed Jun 20 23:56:59 2012
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 5860268943 (2794.39 GiB 3000.46 GB)
Array Size : 5860268032 (5588.79 GiB 6000.91 GB)
Used Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=911 sectors
State : clean
Device UUID : c97b767a:84d2e7e2:52557d30:51c39784
Update Time : Wed May 8 11:39:40 2019
Checksum : 3d08e837 - correct
Events : 1193
Layout : near=2
Chunk Size : 512K
Device Role : Active device 3
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@nas2:~# mdadm --examine /dev/sde
/dev/sde:
MBR Magic : aa55
Partition[0] : 4294967295 sectors at 1 (type ee)
root@nas2:~# mdadm --examine /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6abe1f20:90c629de:fadd8dc0:ca14c928
Name : nas2:0 (local to host nas2)
Creation Time : Wed Jun 20 23:56:59 2012
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 5860268943 (2794.39 GiB 3000.46 GB)
Array Size : 5860268032 (5588.79 GiB 6000.91 GB)
Used Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=911 sectors
State : clean
Device UUID : 82667e81:a6158319:85e0282e:845eec1c
Update Time : Wed May 8 11:00:29 2019
Checksum : 10ac3349 - correct
Events : 1193
Layout : near=2
Chunk Size : 512K
Device Role : spare
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
root@nas2:~#
mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Raid Level : raid0
Total Devices : 4
Persistence : Superblock is persistent
State : inactive
Working Devices : 4
Name : nas2:0 (local to host nas2)
UUID : 6abe1f20:90c629de:fadd8dc0:ca14c928
Events : 1193
Number Major Minor RaidDevice
- 8 65 - /dev/sde1
- 8 49 - /dev/sdd1
- 8 33 - /dev/sdc1
- 8 17 - /dev/sdb1
cat /proc/mdstat
Personalities : [raid10]
md0 : inactive sdc1[1](S) sdb1[0](S) sde1[4](S) sdd1[3](S)
11720537886 blocks super 1.2
unused devices: <none>
--
__
/ ` Eric Valette
/-- __ o _. 6 rue Paul Le Flem
(___, / (_(_(__ 35740 Pace
Tel: +33 (0)2 99 85 26 76 Fax: +33 (0)2 99 85 26 76
E-mail: eric.valette@xxxxxxx
