Looking for some expert advice on how to proceed please!
SSD drive for OMV, Two Raid 5 drive arrays used as data storage. 3 x 3Tb, and 3 x 1.5Tb. The 3x1.5Tb labelled as 'ExternalDisk' (/dev/md126 ) suffered a drive failure. I had a cold spare identical drive that I used to replace the failed drive. When I then tried to use the 'Recover' option in OMV to add the new drive to the failed array I get this message
Failed to execute command 'export LANG=C; mdadm --manage '/dev/md126' --add /dev/sdh 2>&1': mdadm: cannot load array metadata from /dev/md126
Degraded Array Info from Support Information Menu:
Personalities : [raid6] [raid5] [raid4]
md126 : active raid5 sdd[0](F) sdf[2](F) sde[1](F)
2930014208 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/0] [___]
md127 : active raid5 sdb[0] sdg[2] sdc[1]
5860530176 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]
[===================>.] check = 99.7% (2921787740/2930265088) finish=1.7min speed=82042K/sec
unused devices: <none>
/dev/sda1: UUID="945edb3f-adb2-4f97-aaa4-672051d9de49" TYPE="ext4"
/dev/sda5: UUID="41cecf67-457a-4600-8189-596325aee2ce" TYPE="swap"
/dev/sdb: UUID="308e44c1-5e9a-6c22-3949-34a900e335e1" UUID_SUB="ae78e9e4-a100-c804-77a4-a1c4b4462fa0" LABEL="OpenMediaVault:Storage" TYPE="linux_raid_member"
/dev/md127: LABEL="Disk" UUID="fd5d3309-9138-4ee0-8426-194937c3dd59" TYPE="ext4"
/dev/sdc: UUID="308e44c1-5e9a-6c22-3949-34a900e335e1" UUID_SUB="9bc7e9e5-1a50-77e4-b81d-f01f01215a10" LABEL="OpenMediaVault:Storage" TYPE="linux_raid_member"
/dev/sdg: UUID="308e44c1-5e9a-6c22-3949-34a900e335e1" UUID_SUB="f73c7900-3683-a068-b7e7-588abfba158a" LABEL="OpenMediaVault:Storage" TYPE="linux_raid_member"
/dev/md126: LABEL="ExternalDisk" UUID="7f39497e-1305-437f-9628-2b4137e21845" TYPE="ext4"
/dev/sdi: UUID="538d7098-e88a-fb5b-0611-ed878e2ee3c1" UUID_SUB="7a8a8436-ffce-c3dd-27fc-6a886db765b9" LABEL="Castleserver:ExternalDisk" TYPE="linux_raid_member"
/dev/sdj: UUID="538d7098-e88a-fb5b-0611-ed878e2ee3c1" UUID_SUB="3aca517c-b646-f969-f8a0-95c296b5a379" LABEL="Castleserver:ExternalDisk" TYPE="linux_raid_member"
Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 1 1565565871 782782935+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sda: 180.0 GB, 180045766656 bytes
255 heads, 63 sectors/track, 21889 cylinders, total 351651888 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00063bde
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 337332223 168665088 83 Linux
/dev/sda2 337334270 351649791 7157761 5 Extended
/dev/sda5 337334272 351649791 7157760 82 Linux swap / Solaris
Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Disk /dev/sdg: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xcabacaba
Disk /dev/md127: 6001.2 GB, 6001182900224 bytes
2 heads, 4 sectors/track, 1465132544 cylinders, total 11721060352 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
Disk /dev/md126: 3000.3 GB, 3000334548992 bytes
2 heads, 4 sectors/track, 732503552 cylinders, total 5860028416 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
Disk /dev/sdh: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdi: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdj: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000