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RN31400: data DEAD, All drive showing NEW healthy on reboot
NAS was showing 'data Dead' on LCD on inspection after noticing that it wasn't working. Turned it off and restarted the box. Rebooted, admin suite has the notification 'Remove inactive volumes to use the disk. Disk #1,2,3,4.' Turned off box overnight. Turned on this morning, LCD giving messages such as new disk added, however disks are untouched. Ultimately booted into safemode this time. Have run OS Reinstall, no change.
Under volumes:
my original 'data' volume shows data 0, Free: 0, Type: RAID unknown.
new 'data-0' volume that has appeared shows data 8.17 TB, Free: 0, Type: RAID 5.
All four disks showing no errors, giving Volume State: NEW & Disk State: ONLINE on each
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
I don't think the NAS retains any state on this, other than what btrfs itself retains.
What you need to do is forcibly mount the array, and perhaps also attempt to repair the file system. This isn't something I've ever needed to do, so I can't really offer much advice.
If you boot up in tech support mode, you could try
# rnutil chroot
# btrfs device scan
# btrfs fi show
# mount -t btrfs -o ro,recovery /dev/md127 /data
If you just go into ssh with the NAS running, then you'd skip the rnutil command.
One user here successfully used that mount command to mount a missing volume. If it works then it will mount the volume read-only so you'd need to offload the data.
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
Since you have access to the data, I think you are far better off doing a backup, factory default, and restore. I would not trust that you have taken care of every possible detail if you manually try to re-build the configuration files. And if you haven't, future expansion could be problematic.
FYI "data-0" is the name of the first MDADM RAID that makes up BTRFS volume "data". If you have two layers of RAID (from vertical expansion in the past), you may have "lost" the second one (data-1).
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
@Sandshark Thank you for your reply. Your help is utterly invaluable! I'm not sure I understand. I've only really looked at the web admin suite showing the following: https://i.imgur.com/MNs02tZ.jpg
The four identical drives have been in from the start, RAID 5 and at this point I will have no interest in expanding the device in the future. This box was chosen to avoid this kind of time sink, if a drive failed, slap in a new one and forget was intended. 😞 As you can see above when it was working I only had 'data' volume as RAID 5 with the usage tallied.
When it comes to backing up and reseting as you mention, how do I have access to data? Is there a process/guide that you could recommend? (sorry I am having difficulty googling this issue!) I'm guessing that the backup will probably requires roughly 4TB, I'll need to have that space available elsewhere... Could be time to get a new nas and put this one on ebay?
I'd love to know why the software decided that any hard drives disconnected considering the device is locked in a ventilated cupboard and only I have the key. Hey ho. 😕
Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md1 : active raid10 sdd2[3] sdc2[2] sdb2[1] sda2[0]
1044480 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU]
md0 : active raid1 sdd1[6] sdc1[4] sda1[1] sdb1[5]
4190208 blocks super 1.2 [4/4] [UUUU]
unused devices: <none>
/dev/md/0:
Version : 1.2
Creation Time : Sat Dec 24 09:59:59 2016
Raid Level : raid1
Array Size : 4190208 (4.00 GiB 4.29 GB)
Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Wed Sep 16 11:27:42 2020
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Consistency Policy : unknown
Name : 2fe5cdf4:0 (local to host 2fe5cdf4)
UUID : 0306a872:cd2ef930:e5f2473d:32708412
Events : 649
Number Major Minor RaidDevice State
4 8 33 0 active sync /dev/sdc1
1 8 1 1 active sync /dev/sda1
6 8 49 2 active sync /dev/sdd1
5 8 17 3 active sync /dev/sdb1
As I see it, the box had a special moment and erroniously decided two discs at the same time were disconnected hence giving a fail on the raid array. The data is presumably all there still.
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
So the disks do have healthy smart stats, but the array for the volume itself doesn't appear in mdstat.log. You are only showing the OS partition and the swap partition.
What you might want to do next is send a private message (PM) to one of the mods - either @JohnCM_S or @Marc_V - asking them to analyze the logs. Upload your log zip file to cloud storage (google drive, dropbox, etc), and include a download link in the PM. Also send a link to this thread.
You send a PM using the envelope link in the upper right of the forum page. Note you shouldn't post a link to the log zip publicly.
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
Yes, I guess I confused your message with part of another where data access was still there. Have you ever done a vertical expansion on this NAS? If so, you are also missing the data-1 RAID, which should be part of the data BTRFS volume, which would prevent it from mounting. But rather than have you continue to post more log files, getting one of the mods to do an analysis will be a lot faster and probably more fruitful.
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
Righto. All disks checked.
Failed SMART/Extended Tests. Bad Sector repaired. (This'll be going in the bin, will get new drive).
Passed SMART/Extended Tests.
Passed SMART/Extended Tests.
Passed SMART/Extended Tests.
I did get disk 3 with unknown status, after plugging back in but have given connectors a little puff of air and replugged in and it's OK for now (hopefully).
Is there a way to attempt to rebuild volume from 2,3 & 4? Will add new disc in 1 with same capacity. If I get that I'll perform a full backup in penitance!
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
@StephenB No, didn't work booting in safemode and removing #1. The box decided at one point that 2 discs had failed and now will sit on it's hands. Disc 2,3,4 are fine although bay three might have an issue with the port. #1 had a bad sector and the box picked an terrible time to get it's knickers in a twist on port 3.
All I want to know is... can I ssh onto the box and tell it proceed with rebuild from 2,3,4. At this point, I don't care if I lose the data in the attempt. All I want is one attempt then I'll move on. If anyone can offer instruction (with absolute disclaimer, I won't blame anyone but myself).. I'd love to just attempt to recover data.
Alternatively if that is impossible on x-raid could you point me at DIY data recovery guides that may be relevant to x-raid devices.
Re: RN31400: data DEAD, All drive showing NEW healthy on reboot
I don't think the NAS retains any state on this, other than what btrfs itself retains.
What you need to do is forcibly mount the array, and perhaps also attempt to repair the file system. This isn't something I've ever needed to do, so I can't really offer much advice.
If you boot up in tech support mode, you could try
# rnutil chroot
# btrfs device scan
# btrfs fi show
# mount -t btrfs -o ro,recovery /dev/md127 /data
If you just go into ssh with the NAS running, then you'd skip the rnutil command.
One user here successfully used that mount command to mount a missing volume. If it works then it will mount the volume read-only so you'd need to offload the data.
