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Disk replacement - back sync and again degraded after reboot
Hi all,
I am having some trouble with my RN524. I have 2x1TB and 2x4TB disks, each couple in RAID1 on my NAS. A few days ago, while I was away (bacause it always happens while I am away...) one of the two 4TB disks have been flagged as damaged and the disks went to degraded.
Yesteday I got the replacement -same disk as the other one- and installed it. It went through resync as usual, this morning I received the notification that health was back ok. There was an update due, so I applied it, NAS rebooted... and disks were back to degraded. Apparently the new disk has not been associated with the old one ---but they were before the reboot!
This is the list of messages I got:
(yesterday) 12/01/2020, 10:31 -
Disk in channel 3 (Internal) changed state from RESYNC to ONLINE.
(today) 03:23
Volume Volume4TB is resynced.
03:23
Volume Volume4TB health changed from Degraded to Redundant.
(after the reboot) 09:31
Volume Volume4TB is Degraded.
How should I link it again? I attach a screenshot of what I see now in the admin page...
Thanks!
Gian Paolo
I have returned finally home and swapped the drives... and it works fine.
Oh well, problem solved, next time use more brain...
Thank you everyone, sorry for the mistake!
16 Replies
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I have the feeling that something got stuck in the OS. I have tried to format the disk and nothing changed. I have tried also to set it as global spare but nothing changed either. I'm not sure of what I can do remotely once I leave, I'm quite nervous about leaving the NAS for two more weeks without redundancy... I have the backup, but still...
gpaolo wrote:
I have tried also to set it as global spare
Why? FWIW, you can't do that if the disk is already part of a volume.
gpaolo wrote:
I'm quite nervous about leaving the NAS for two more weeks without redundancy... I have the backup, but still...
I suggest downloading the log zip file. System.log and Kernel.log normally will contain any disk errors or btrfs file system errors, so look in those files. Also look at the SMART stats in disk_info.log - particularly for reallocated or pending sectors.
It sounds like your NAS is undecided about that drive's status. Prevention of formatting and inability to expand using it or set it as a spare would normally mean the drive is a part of the volume. But the display clearly shows it's not.
Download the log zip file and look at mdstat.log and see if it shows the drive as a part of the volume. Paste it in a message here if you need help interpreting. Maybe the GUI and the underlying Linux system are out of sync.
The next thing you should do is insure that your backup is up to date. When the NAS gets into a "grey area", as yours seems to have done, volume loss becomes a bigger risk.
If the log says the drive is a part of the volume, then a reboot might clear things up. If it's not, removing and re-installing (with power on) may change things. If you have the ability to test the drive with vendor tools on a PC while it's out, that's also a good step.
Oh that's great, my reply has disappeared...
Ok I don't know what happened, sorry.
Resuming, thank you both of course for your suggestions. I have downloaded the logs, this is the content of mdstat:
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] md126 : active raid1 sda3[0] sdb3[1] 971912832 blocks super 1.2 [2/2] [UU] md127 : active raid1 sdd3[1] 3902168832 blocks super 1.2 [2/1] [_U] md0 : active raid1 sda1[0] sdd1[3] sdb1[1] 4190208 blocks super 1.2 [3/3] [UUU] unused devices: <none> /dev/md/0: Version : 1.2 Creation Time : Fri May 18 21:43:37 2018 Raid Level : raid1 Array Size : 4190208 (4.00 GiB 4.29 GB) Used Dev Size : 4190208 (4.00 GiB 4.29 GB) Raid Devices : 3 Total Devices : 3 Persistence : Superblock is persistent Update Time : Mon Jan 13 11:43:05 2020 State : active Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Consistency Policy : unknown Name : 2fe75bc5:0 (local to host 2fe75bc5) UUID : ec490464:fbbd3e14:c6a1b5d7:03ec6667 Events : 32940 Number Major Minor RaidDevice State 0 8 1 0 active sync /dev/sda1 1 8 17 1 active sync /dev/sdb1 3 8 49 2 active sync /dev/sdd1 /dev/md/Volume1TB-0: Version : 1.2 Creation Time : Fri May 18 21:57:08 2018 Raid Level : raid1 Array Size : 971912832 (926.89 GiB 995.24 GB) Used Dev Size : 971912832 (926.89 GiB 995.24 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Update Time : Tue Jan 14 22:18:07 2020 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Consistency Policy : unknown Name : 2fe75bc5:Volume1TB-0 (local to host 2fe75bc5) UUID : 84a155e1:4166905b:af7b6c5d:15ad37ba Events : 47 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3 /dev/md/Volume4TB-0: Version : 1.2 Creation Time : Fri May 18 21:57:35 2018 Raid Level : raid1 Array Size : 3902168832 (3721.40 GiB 3995.82 GB) Used Dev Size : 3902168832 (3721.40 GiB 3995.82 GB) Raid Devices : 2 Total Devices : 1 Persistence : Superblock is persistent Update Time : Tue Jan 14 12:06:24 2020 State : clean, degraded Active Devices : 1 Working Devices : 1 Failed Devices : 0 Spare Devices : 0 Consistency Policy : unknown Name : 2fe75bc5:Volume4TB-0 (local to host 2fe75bc5) UUID : 30c9acd6:d608709f:a6ed80df:cb332b59 Events : 3340 Number Major Minor RaidDevice State - 0 0 0 removed 1 8 51 1 active sync /dev/sdd3I'm not sure if I understand it correctly: does it say that the new disk has been assigned to a new volume?
I have already tried in the past days to reboot and to remove and reinstall the disk, but nothing changed. I guess the only thing I can do now is when I get back to remove the disk, format it on a PC and put it back?
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