I awoke to find my drive has 4 red led’s when it was working perfectly well the night before.
The drive is under warranty but even though I have sent the logs and shown the issue to WD they are refusing to help me, stating that the device has no mount, no volume and no raid and it did a factory reset by itself in the middle of the night and I should go and pay for data recovery because they don’t do that.
Seriously, this is what their support response is for an under warranty item. If I had known this is how they would treat people before I purchased the item, then things would have been different.
They said there is no raid configured, yet in dmesg, it clearly shows there is:
38.038777] RAID conf printout:
[ 38.038779] — level:5 rd:4 wd:4
[ 38.038782] disk 0, o:1, dev:sda2
[ 38.038784] disk 1, o:1, dev:sdb2
[ 38.038786] disk 2, o:1, dev:sdc2
[ 38.038788] disk 3, o:1, dev:sdd2
Its quite simple, the device had a raid across all 4 8TB WD drives, it had around 16TB of free data, now it says I have 0MB free and no volume is configured or mounted.
If you look at the output from dmesg you can see that it tries to mount md1 but finds lots of:
75.466431] EXT4-fs (md1): ext4_check_descriptors: Block bitmap for group 21568 not in group (block 2251799813718436)!
[ 75.478398] EXT4-fs (md1): group descriptors corrupted!
So, there is an issue here. Maybe there was a power cut during the night. After a full drive test they are all good. I have checked the drives to see if they have any super block backups and they all have the same backups:
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848, 512000000, 550731776, 644972544, 1934917632
This is the same on all 4 sda2, sdb2, sdc2 and sdd2. (This tells me there is a raid)
So, with the lack of qualified support from WD, how can I fix the corruption with the backups? Firstly I will need to mount MD1 as it isn’t mounted. Then replace the corruption with a backup?
I hope someone can help me, unfortunately this device, which I trusted, has my fathers data and photos and he passed away recently and its the only place we have the data.