I have 2 identical WD Ultrastar HUS726T6TALE 6TB hard drives.
I have (had) a working raid-1 that mounts and runs ok for a few weeks, seeming like earlier problems were in the past.
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$ fdisk -l
Disk /dev/sdc: 5.46 TiB, 6001175126016 bytes, 11721045168 sectors
Disk model: EC-73520
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disklabel type: gpt
Disk identifier: BF5C5010-71BF-4FE6-852F-1E01DD90C1E5
Device Start End Sectors Size Type
/dev/sdc1 2048 11721043967 11721041920 5.5T Linux filesystem
Disk /dev/sdd: 5.46 TiB, 6001175126016 bytes, 11721045168 sectors
Disk model: EC-73521
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disklabel type: gpt
Disk identifier: CC9B7C53-E025-41EC-8BAB-877D884E190A
Device Start End Sectors Size Type
/dev/sdd1 2048 11721043967 11721041920 5.5T Linux filesystem
$ sudo lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdc 8:32 0 5.5T 0 disk
└─sdc1 8:33 0 5.5T 0 part
└─md0 9:0 0 5.5T 0 raid1 /mnt/Acasis_RAID1_6Tb
sdd 8:48 0 5.5T 0 disk
└─sdd1 8:49 0 5.5T 0 part
└─md0 9:0 0 5.5T 0 raid1 /mnt/Acasis_RAID1_6Tb
$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdc1[0] sdd1[1]
5860388864 blocks super 1.2 [2/2] [UU]
bitmap: 0/44 pages [0KB], 65536KB chunk
unused devices: <none>
$ sudo mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Jan 27 12:07:27 2024
Raid Level : raid1
Array Size : 5860388864 (5588.90 GiB 6001.04 GB)
Used Dev Size : 5860388864 (5588.90 GiB 6001.04 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Mon Jan 29 18:26:15 2024
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Consistency Policy : bitmap
Name : roxy10-debian11-x64:0 (local to host roxy10-debian11-x64)
UUID : 1e3f7f7e:23a5b75f:6f76abf5:88f5e704
Events : 21674
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
$ df
/dev/md0 5813107304 2543033168 2977054696 47% /mnt/Acasis_RAID1_6Tb
$ lsusb
Bus 003 Device 003: ID 214b:7250 Huasheng Electronics USB2.0 HUB
Bus 003 Device 002: ID 214b:7250 Huasheng Electronics USB2.0 HUB
$ cat /etc/debian_version
11.8
After 5 minutes the computer froze up, no screen updates, no keyboard. Frozen.
Rebooted, and looked at /var/log/messages
Lots of errors, several call-Trace events.
I repeated the sequence and confirmed it is repeatable.
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$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sdc1[0](S) sdd1[1](S)
11720777728 blocks super 1.2
unused devices: <none>
$ sudo mount /mnt/Acasis_RAID1_6Tb/
mount: /mnt/Acasis_RAID1_6Tb: can't read superblock on /dev/md0.
Besides saying the enclosure firmware is garbage, despite being advertised as being compatible with linux, can anyone say why it crashes so badly? and anything I should try before tearing it apart and trying other solutions to get my data rescued?
Thanks