Raid Vanished

Hi, please forgive my english skills.
I'm a newb and install an OMV home serveur with raid 5 (if I remember correctly)

Yesterday I cut my Home Power Supply so the server shut down, when i turned it on once again, the boot messages was full of errors.

One of them was:
fsck.ext4: Unable to resolve 'UUID=0ba8ff35-ff8e-4416-8186-855a63544040'
fsck died with exit status 8

On my omv config page I have no more Raid listed, I still have my 3 physicall disks used to create the raid, and in my filesystem I have 1 filesystem listed, mounted, with status missing, and n/a to all other boxes.

I tryed a fews things, more or less at random since I dind't know anything...
for example:
root@openmediavault:/media/0ba8ff35-ff8e-4416-8186-855a63544040# blkid
/dev/sda1: UUID="0280a620-000a-47d3-8c3d-ed2d4f4d7e5a" TYPE="ext4"
/dev/sda5: UUID="17dcbb16-973e-45e7-9d4b-3a014d5db305" TYPE="swap"
/dev/sdb: UUID="b13d39a1-c47f-92d8-adbf-2a4e05ad6a85" LABEL="openmediavault:serveur" TYPE="linux_raid_member"
/dev/sdd: UUID="b13d39a1-c47f-92d8-adbf-2a4e05ad6a85" LABEL="openmediavault:serveur" TYPE="linux_raid_member"
/dev/sdc: UUID="b13d39a1-c47f-92d8-adbf-2a4e05ad6a85" LABEL="openmediavault:serveur" TYPE="linux_raid_member"

I don't know what to look at or where to look at, I even don't know if I'm in the correcte subsection of the forum, my goal is to getmy files back from this raid since (of course...) I didn't have any back up of thoses files...
If anybody as a clue, it will really help.
I can provide any information you need if you asked.
Best regards.

Zitat von "ryecoaaron"

What is the output of: cat /proc/mdstat

Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sdb[0](S) sdc[2](S) sdd[1](S)
8790796680 blocks super 1.2

unused devices: <none>

Thanks for your help.

Zitat von "ryecoaaron"

Try:

Code

mdadm --stop /dev/md0
mdadm --remove /dev/md0


mdadm --assemble --run --force /dev/md0 /dev/sd[bcd]

Whow; it seems to start doing something in the right direction.

Zitat

root@openmediavault:~# mdadm --stop /dev/md0
mdadm: stopped /dev/md0
root@openmediavault:~# mdadm --remove /dev/md0
mdadm: error opening /dev/md0: No such file or directory
root@openmediavault:~#
root@openmediavault:~# mdadm --assemble --run --force /dev/md0 /dev/sd[bcd]
mdadm: forcing event count in /dev/sdc(2) from 9578 upto 9580
mdadm: clearing FAULTY flag for device 1 in /dev/md0 for /dev/sdc
mdadm: /dev/md0 has been started with 2 drives (out of 3).

Alles anzeigen

In my omv gui I see my raid listed as clean/degraded, I still can't access my shared folder with other computer but it's a huge improvement.
Yesterday on a French forum I tryed some things because of advices and remove one line in a mdadm conf because it was redondant as I was told. I don't know if that could explain the error opening /dev/md0.
By the way, your avatar seems really appropriate

here is the report:

root@openmediavault:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active (auto-read-only) raid5 sdb[0] sdc[2]
5860530176 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [U_U]

unused devices: <none>

I'm a fan of R2D2 opening gates, reparing engines, pushing back aliens...
I was just looking about translation of the star wars card game

Zitat von "ryecoaaron"

Now add the missing drive back in:

Code

mdadm --zero-superblock /dev/sdd
mdadm --add /dev/md0 /dev/sdd

Thanks I pasted the 2 lines at once, after that I try to copy paste one line after another, but I got some errors, I assumed the system proceeded the 2 commands the first time.The drive is added

In my gui my raid is clean/degrade/recovering ()
I don't have any %, I assume I must let it like that and don't click the "recover" tab.

Thanks for helping.

Zitat von "ryecoaaron"

Hope it works. You can check on progress with cat /proc/mdstat
No need to click recover.

I track the % with the "detail" folder on the gui, it seems to work (6%)
I assume once it's repaired I have to mounted it, or it will be mounted by itself?

Anyway, if I have your postal adress I'll sent you a little something for your help.

Thanks a lot R2

Zitat von "ryecoaaron"

I think you have to mount it. I don't remember

I appreciate the offer but no need

I'll go to bed, it's full night in France.

I'll look at that raid tomorrow.

I'll probably sleep a lot well than last night thanks to you.

Bad news this morning:

root@openmediavault:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid5 sdd[3](S) sdb[0] sdc[2](F)
5860530176 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/1] [U__]

unused devices: <none>

In my GUI the raid is listed as "failed"

I have pages of errors, many errors from type Buffer I/O errors on mdO
Errors type /usr/sbin/cron mkgraph, etc

I don't know how to provide you complete listing of errors and if you need it...

Zitat von "ryecoaaron"

Unfortunately, if there are errors in that log, it usually is a bad sign and the hard drive might be going bad. It is still possible that it is a driver issue. What type of drives and motherboard are you using?

I use WD green 3TO and a G41M from MSI

May be a HDD has some problems, I don't know how to test them.

I tryed a few software to recover data, and thoses softwares seems to find some datas: my img seems to be there, the software seems to find some folders, but I can't explore them.
Moreover, the software can't recover various other kinds of files.
It seems that my data are still on the drives, is there a way to explore those drives using a software or building the raid in a console? My filesystem is listed as missing once again in the OMV window.

I don't care if I have to buy new disk to restore my datas or buy a software...