Hello,
You achieved dirty-degraded RAID5 scenario:
> Map State : degraded
> Dirty State : dirty
Support for assembling IMSM dirty degraded array has been
added recently to mdadm:
https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=7b99edab2834d5d08ef774b4cff784caaa1a186f
This array cannot be assembled automatically, Incremental mode doesn't
support it. To start it you need to do following steps:
1. Backup the data on the drives first.
2. Check that mdadm has this fix included. The simplest way is to
download source package and check %patches section in mdadm.spec file.
If no, then compile your mdadm or please find distribution with fix
included.
3. Stop this inactive array:
# mdadm -S /dev/md/md0
4. Call assemble on the container with force flag:
# mdadm -A /dev/md127 /dev/md/md0 --force
You will see prompt:
"%s array state forced to clean. It may cause data corruption."
That is true, some data may be invalid. There is no safe way to start
your array.
Regards,
Mariusz
On 06.02.2021 04:19, 19 Devices linuxraid wrote:
Hi, I'm hoping you can help me repair this RAID array (md125 below). It failed
after a repeated series of power interruptions. There are 4 x 1TB drives with 2
RAID 5 arrays spread across them. One array is working (md126) as are all 4
drives.
The boot drive was on the failed array so the system is running from a Fedora 33
Live USB. Details of the 3 arrays and 4 drives follow.
[root@localhost-live ~]# mdadm -D /dev/md125
/dev/md125:
Container : /dev/md/imsm0, member 0
Raid Devices : 4
Total Devices : 3
State : active, FAILED, Not Started
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
UUID : 38c20294:230f3d70:a1a5c8bd:8add8ba5
Number Major Minor RaidDevice State
- 0 0 0 removed
- 0 0 1 removed
- 0 0 2 removed
- 0 0 3 removed
- 8 32 0 sync /dev/sdc
- 8 0 1 sync /dev/sda
- 8 48 3 sync /dev/sdd
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm -D /dev/md126
/dev/md126:
Container : /dev/md/imsm0, member 1
Raid Level : raid5
Array Size : 99116032 (94.52 GiB 101.49 GB)
Used Dev Size : 33038976 (31.51 GiB 33.83 GB)
Raid Devices : 4
Total Devices : 4
State : clean, degraded, recovering
Active Devices : 3
Working Devices : 4
Failed Devices : 0
Spare Devices : 1
Layout : left-asymmetric
Chunk Size : 128K
Consistency Policy : resync
Rebuild Status : 35% complete
UUID : 43d19777:6d66ecfa:3113d7a9:4feb07b4
Number Major Minor RaidDevice State
3 8 32 0 active sync /dev/sdc
2 8 0 1 active sync /dev/sda
1 8 16 2 spare rebuilding /dev/sdb
0 8 48 3 active sync /dev/sdd
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm -D /dev/md127
/dev/md127:
Version : imsm
Raid Level : container
Total Devices : 4
Working Devices : 4
UUID : bdb7f495:21b8c189:e4968216:6f2d6c4c
Member Arrays : /dev/md125 /dev/md/md1_0
Number Major Minor RaidDevice
- 8 32 - /dev/sdc
- 8 0 - /dev/sda
- 8 48 - /dev/sdd
- 8 16 - /dev/sdb
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm --examine /dev/sda
/dev/sda:
Magic : Intel Raid ISM Cfg Sig.
Version : 1.3.00
Orig Family : ab386e31
Family : 775b3841
Generation : 00458337
Attributes : All supported
UUID : bdb7f495:21b8c189:e4968216:6f2d6c4c
Checksum : f25e8e6d correct
MPB Sectors : 2
Disks : 5
RAID Devices : 2
Disk01 Serial : WD-WCC3F1681668
State : active
Id : 00000001
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[md0]:
UUID : 38c20294:230f3d70:a1a5c8bd:8add8ba5
RAID Level : 5
Members : 4
Slots : [UU_U]
Failed disk : 2
This Slot : 1
Sector Size : 512
Array Size : 5662310400 (2700.00 GiB 2899.10 GB)
Per Dev Size : 1887436800 (900.00 GiB 966.37 GB)
Sector Offset : 0
Num Stripes : 7372800
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : degraded
Dirty State : dirty
RWH Policy : off
[md1]:
UUID : 43d19777:6d66ecfa:3113d7a9:4feb07b4
RAID Level : 5
Members : 4
Slots : [UUUU]
Failed disk : none
This Slot : 1
Sector Size : 512
Array Size : 198232064 (94.52 GiB 101.49 GB)
Per Dev Size : 66077952 (31.51 GiB 33.83 GB)
Sector Offset : 1887440896
Num Stripes : 258117
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : normal
Dirty State : clean
RWH Policy : <unknown:128>
Disk00 Serial : S13PJDWS608386
State : active
Id : 00000003
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk02 Serial : D-WMC3F2148323:0
State : active
Id : ffffffff
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk03 Serial : S13PJDWS608384
State : active
Id : 00000004
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk04 Serial : WD-WMC3F2148323
State : active
Id : 00000002
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm --examine /dev/sdb
/dev/sdb:
Magic : Intel Raid ISM Cfg Sig.
Version : 1.3.00
Orig Family : ab386e31
Family : 775b3841
Generation : 00458337
Attributes : All supported
UUID : bdb7f495:21b8c189:e4968216:6f2d6c4c
Checksum : f25e8e6d correct
MPB Sectors : 2
Disks : 5
RAID Devices : 2
Disk04 Serial : WD-WMC3F2148323
State : active
Id : 00000002
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[md0]:
UUID : 38c20294:230f3d70:a1a5c8bd:8add8ba5
RAID Level : 5
Members : 4
Slots : [UU_U]
Failed disk : 2
This Slot : ?
Sector Size : 512
Array Size : 5662310400 (2700.00 GiB 2899.10 GB)
Per Dev Size : 1887436800 (900.00 GiB 966.37 GB)
Sector Offset : 0
Num Stripes : 7372800
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : degraded
Dirty State : dirty
RWH Policy : off
[md1]:
UUID : 43d19777:6d66ecfa:3113d7a9:4feb07b4
RAID Level : 5
Members : 4
Slots : [UUUU]
Failed disk : none
This Slot : 2
Sector Size : 512
Array Size : 198232064 (94.52 GiB 101.49 GB)
Per Dev Size : 66077952 (31.51 GiB 33.83 GB)
Sector Offset : 1887440896
Num Stripes : 258117
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : normal
Dirty State : clean
RWH Policy : <unknown:128>
Disk00 Serial : S13PJDWS608386
State : active
Id : 00000003
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk01 Serial : WD-WCC3F1681668
State : active
Id : 00000001
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk02 Serial : D-WMC3F2148323:0
State : active
Id : ffffffff
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk03 Serial : S13PJDWS608384
State : active
Id : 00000004
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm --examine /dev/sdc
/dev/sdc:
Magic : Intel Raid ISM Cfg Sig.
Version : 1.3.00
Orig Family : ab386e31
Family : 775b3841
Generation : 00458337
Attributes : All supported
UUID : bdb7f495:21b8c189:e4968216:6f2d6c4c
Checksum : f25e8e6d correct
MPB Sectors : 2
Disks : 5
RAID Devices : 2
Disk00 Serial : S13PJDWS608386
State : active
Id : 00000003
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[md0]:
UUID : 38c20294:230f3d70:a1a5c8bd:8add8ba5
RAID Level : 5
Members : 4
Slots : [UU_U]
Failed disk : 2
This Slot : 0
Sector Size : 512
Array Size : 5662310400 (2700.00 GiB 2899.10 GB)
Per Dev Size : 1887436800 (900.00 GiB 966.37 GB)
Sector Offset : 0
Num Stripes : 7372800
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : degraded
Dirty State : dirty
RWH Policy : off
[md1]:
UUID : 43d19777:6d66ecfa:3113d7a9:4feb07b4
RAID Level : 5
Members : 4
Slots : [UUUU]
Failed disk : none
This Slot : 0
Sector Size : 512
Array Size : 198232064 (94.52 GiB 101.49 GB)
Per Dev Size : 66077952 (31.51 GiB 33.83 GB)
Sector Offset : 1887440896
Num Stripes : 258117
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : normal
Dirty State : clean
RWH Policy : <unknown:128>
Disk01 Serial : WD-WCC3F1681668
State : active
Id : 00000001
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk02 Serial : D-WMC3F2148323:0
State : active
Id : ffffffff
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk03 Serial : S13PJDWS608384
State : active
Id : 00000004
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk04 Serial : WD-WMC3F2148323
State : active
Id : 00000002
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[root@localhost-live ~]#
[root@localhost-live ~]# mdadm --examine /dev/sdd
/dev/sdd:
Magic : Intel Raid ISM Cfg Sig.
Version : 1.3.00
Orig Family : ab386e31
Family : 775b3841
Generation : 00458337
Attributes : All supported
UUID : bdb7f495:21b8c189:e4968216:6f2d6c4c
Checksum : f25e8e6d correct
MPB Sectors : 2
Disks : 5
RAID Devices : 2
Disk03 Serial : S13PJDWS608384
State : active
Id : 00000004
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[md0]:
UUID : 38c20294:230f3d70:a1a5c8bd:8add8ba5
RAID Level : 5
Members : 4
Slots : [UU_U]
Failed disk : 2
This Slot : 3
Sector Size : 512
Array Size : 5662310400 (2700.00 GiB 2899.10 GB)
Per Dev Size : 1887436800 (900.00 GiB 966.37 GB)
Sector Offset : 0
Num Stripes : 7372800
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : degraded
Dirty State : dirty
RWH Policy : off
[md1]:
UUID : 43d19777:6d66ecfa:3113d7a9:4feb07b4
RAID Level : 5
Members : 4
Slots : [UUUU]
Failed disk : none
This Slot : 3
Sector Size : 512
Array Size : 198232064 (94.52 GiB 101.49 GB)
Per Dev Size : 66077952 (31.51 GiB 33.83 GB)
Sector Offset : 1887440896
Num Stripes : 258117
Chunk Size : 128 KiB
Reserved : 0
Migrate State : idle
Map State : normal
Dirty State : clean
RWH Policy : <unknown:128>
Disk00 Serial : S13PJDWS608386
State : active
Id : 00000003
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk01 Serial : WD-WCC3F1681668
State : active
Id : 00000001
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk02 Serial : D-WMC3F2148323:0
State : active
Id : ffffffff
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
Disk04 Serial : WD-WMC3F2148323
State : active
Id : 00000002
Usable Size : 1953518848 (931.51 GiB 1000.20 GB)
[root@localhost-live ~]#
Thanks
ps. Why was my Outlook.com email address rejected by this server?
