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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 t...
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!
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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