DSM 5.2 user here - for the most part - works great, but when something happens to the Hyper-V host it often fails spectacularly. Today is one of those days.
I'm not great at under the hood stuff but have Google'd around and come to the conclusion the whole thing is confused! I only have one RAID5 with 7 disks in total which seems to correspond to mdadm --detail /dev/md2.
Can anyone give me any guidance on how to bring the volume back to life?
SuperSyno> mdadm --detail /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Sun Apr 1 20:22:22 2018
Raid Level : raid5
Array Size : 3906971648 (3725.98 GiB 4000.74 GB)
Used Dev Size : 976742912 (931.49 GiB 1000.18 GB)
Raid Devices : 5
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Fri Dec 21 07:52:22 2018
State : clean, degraded
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : SUPERSYNO:3
UUID : e3f844f6:4bd70c27:c40439c2:8d1a29e9
Events : 12216
Number Major Minor RaidDevice State
0 8 70 0 active sync /dev/sde6
1 0 0 1 removed
4 8 150 2 active sync /dev/sdj6
5 8 118 3 active sync /dev/sdh6
2 8 134 4 active sync /dev/sdi6
SuperSyno> mdadm --detail /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Sat Jan 1 00:04:42 2000
Raid Level : raid1
Array Size : 2490176 (2.37 GiB 2.55 GB)
Used Dev Size : 2490176 (2.37 GiB 2.55 GB)
Raid Devices : 12
Total Devices : 8
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Fri Dec 21 08:08:09 2018
State : clean, degraded
Active Devices : 8
Working Devices : 8
Failed Devices : 0
Spare Devices : 0
UUID : 26aa5fea:f6cb55b4:3017a5a8:c86610be
Events : 0.5720
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
2 8 145 2 active sync /dev/sdj1
3 8 129 3 active sync /dev/sdi1
4 8 113 4 active sync /dev/sdh1
5 8 97 5 active sync /dev/sdg1
6 8 81 6 active sync /dev/sdf1
7 8 65 7 active sync /dev/sde1
8 0 0 8 removed
9 0 0 9 removed
10 0 0 10 removed
11 0 0 11 removed
SuperSyno> mdadm --detail /dev/md1
/dev/md1:
Version : 0.90
Creation Time : Thu Dec 20 22:46:39 2018
Raid Level : raid1
Array Size : 2097088 (2048.28 MiB 2147.42 MB)
Used Dev Size : 2097088 (2048.28 MiB 2147.42 MB)
Raid Devices : 12
Total Devices : 8
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Thu Dec 20 22:47:37 2018
State : active, degraded
Active Devices : 8
Working Devices : 8
Failed Devices : 0
Spare Devices : 0
UUID : 3637e4b4:d5bb08ce:dca69c88:18a34d86 (local to host SuperSyno)
Events : 0.19
Number Major Minor RaidDevice State
0 8 34 0 active sync /dev/sdc2
1 8 50 1 active sync /dev/sdd2
2 8 66 2 active sync /dev/sde2
3 8 82 3 active sync /dev/sdf2
4 8 98 4 active sync /dev/sdg2
5 8 114 5 active sync /dev/sdh2
6 8 130 6 active sync /dev/sdi2
7 8 146 7 active sync /dev/sdj2
8 0 0 8 removed
9 0 0 9 removed
10 0 0 10 removed
11 0 0 11 removed
SuperSyno> mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Sun Apr 1 20:22:22 2018
Raid Level : raid5
Array Size : 20478048192 (19529.39 GiB 20969.52 GB)
Used Dev Size : 2925435456 (2789.91 GiB 2995.65 GB)
Raid Devices : 8
Total Devices : 7
Persistence : Superblock is persistent
Update Time : Thu Dec 20 22:34:47 2018
State : clean, degraded
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : SUPERSYNO:2
UUID : 7d8b04cf:aebb8d01:6034359b:c4bb62db
Events : 280533
Number Major Minor RaidDevice State
9 8 53 0 active sync /dev/sdd5
1 8 69 1 active sync /dev/sde5
2 0 0 2 removed
7 8 149 3 active sync /dev/sdj5
8 8 117 4 active sync /dev/sdh5
5 8 133 5 active sync /dev/sdi5
4 8 101 6 active sync /dev/sdg5
3 8 85 7 active sync /dev/sdf5
SuperSyno> mdadm --detail /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Sun Apr 1 20:22:22 2018
Raid Level : raid5
Array Size : 3906971648 (3725.98 GiB 4000.74 GB)
Used Dev Size : 976742912 (931.49 GiB 1000.18 GB)
Raid Devices : 5
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Fri Dec 21 08:01:56 2018
State : clean, degraded
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : SUPERSYNO:3
UUID : e3f844f6:4bd70c27:c40439c2:8d1a29e9
Events : 12218
Number Major Minor RaidDevice State
0 8 70 0 active sync /dev/sde6
1 0 0 1 removed
4 8 150 2 active sync /dev/sdj6
5 8 118 3 active sync /dev/sdh6
2 8 134 4 active sync /dev/sdi6
Question
elmuziko
Morning all,
DSM 5.2 user here - for the most part - works great, but when something happens to the Hyper-V host it often fails spectacularly. Today is one of those days.
I'm not great at under the hood stuff but have Google'd around and come to the conclusion the whole thing is confused! I only have one RAID5 with 7 disks in total which seems to correspond to mdadm --detail /dev/md2.
Can anyone give me any guidance on how to bring the volume back to life?
SuperSyno> mdadm --detail /dev/md3 /dev/md3: Version : 1.2 Creation Time : Sun Apr 1 20:22:22 2018 Raid Level : raid5 Array Size : 3906971648 (3725.98 GiB 4000.74 GB) Used Dev Size : 976742912 (931.49 GiB 1000.18 GB) Raid Devices : 5 Total Devices : 4 Persistence : Superblock is persistent Update Time : Fri Dec 21 07:52:22 2018 State : clean, degraded Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K Name : SUPERSYNO:3 UUID : e3f844f6:4bd70c27:c40439c2:8d1a29e9 Events : 12216 Number Major Minor RaidDevice State 0 8 70 0 active sync /dev/sde6 1 0 0 1 removed 4 8 150 2 active sync /dev/sdj6 5 8 118 3 active sync /dev/sdh6 2 8 134 4 active sync /dev/sdi6
SuperSyno> mdadm --detail /dev/md0 /dev/md0: Version : 0.90 Creation Time : Sat Jan 1 00:04:42 2000 Raid Level : raid1 Array Size : 2490176 (2.37 GiB 2.55 GB) Used Dev Size : 2490176 (2.37 GiB 2.55 GB) Raid Devices : 12 Total Devices : 8 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Fri Dec 21 08:08:09 2018 State : clean, degraded Active Devices : 8 Working Devices : 8 Failed Devices : 0 Spare Devices : 0 UUID : 26aa5fea:f6cb55b4:3017a5a8:c86610be Events : 0.5720 Number Major Minor RaidDevice State 0 8 33 0 active sync /dev/sdc1 1 8 49 1 active sync /dev/sdd1 2 8 145 2 active sync /dev/sdj1 3 8 129 3 active sync /dev/sdi1 4 8 113 4 active sync /dev/sdh1 5 8 97 5 active sync /dev/sdg1 6 8 81 6 active sync /dev/sdf1 7 8 65 7 active sync /dev/sde1 8 0 0 8 removed 9 0 0 9 removed 10 0 0 10 removed 11 0 0 11 removed
SuperSyno> mdadm --detail /dev/md1 /dev/md1: Version : 0.90 Creation Time : Thu Dec 20 22:46:39 2018 Raid Level : raid1 Array Size : 2097088 (2048.28 MiB 2147.42 MB) Used Dev Size : 2097088 (2048.28 MiB 2147.42 MB) Raid Devices : 12 Total Devices : 8 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Thu Dec 20 22:47:37 2018 State : active, degraded Active Devices : 8 Working Devices : 8 Failed Devices : 0 Spare Devices : 0 UUID : 3637e4b4:d5bb08ce:dca69c88:18a34d86 (local to host SuperSyno) Events : 0.19 Number Major Minor RaidDevice State 0 8 34 0 active sync /dev/sdc2 1 8 50 1 active sync /dev/sdd2 2 8 66 2 active sync /dev/sde2 3 8 82 3 active sync /dev/sdf2 4 8 98 4 active sync /dev/sdg2 5 8 114 5 active sync /dev/sdh2 6 8 130 6 active sync /dev/sdi2 7 8 146 7 active sync /dev/sdj2 8 0 0 8 removed 9 0 0 9 removed 10 0 0 10 removed 11 0 0 11 removed
SuperSyno> mdadm --detail /dev/md2 /dev/md2: Version : 1.2 Creation Time : Sun Apr 1 20:22:22 2018 Raid Level : raid5 Array Size : 20478048192 (19529.39 GiB 20969.52 GB) Used Dev Size : 2925435456 (2789.91 GiB 2995.65 GB) Raid Devices : 8 Total Devices : 7 Persistence : Superblock is persistent Update Time : Thu Dec 20 22:34:47 2018 State : clean, degraded Active Devices : 7 Working Devices : 7 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K Name : SUPERSYNO:2 UUID : 7d8b04cf:aebb8d01:6034359b:c4bb62db Events : 280533 Number Major Minor RaidDevice State 9 8 53 0 active sync /dev/sdd5 1 8 69 1 active sync /dev/sde5 2 0 0 2 removed 7 8 149 3 active sync /dev/sdj5 8 8 117 4 active sync /dev/sdh5 5 8 133 5 active sync /dev/sdi5 4 8 101 6 active sync /dev/sdg5 3 8 85 7 active sync /dev/sdf5
SuperSyno> mdadm --detail /dev/md3 /dev/md3: Version : 1.2 Creation Time : Sun Apr 1 20:22:22 2018 Raid Level : raid5 Array Size : 3906971648 (3725.98 GiB 4000.74 GB) Used Dev Size : 976742912 (931.49 GiB 1000.18 GB) Raid Devices : 5 Total Devices : 4 Persistence : Superblock is persistent Update Time : Fri Dec 21 08:01:56 2018 State : clean, degraded Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K Name : SUPERSYNO:3 UUID : e3f844f6:4bd70c27:c40439c2:8d1a29e9 Events : 12218 Number Major Minor RaidDevice State 0 8 70 0 active sync /dev/sde6 1 0 0 1 removed 4 8 150 2 active sync /dev/sdj6 5 8 118 3 active sync /dev/sdh6 2 8 134 4 active sync /dev/sdi6
Added proper code tags.
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