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Forum Discussion
Raid5 is broken and separate raid0 and raid1?
I made the raid5 with 6 disks and used for a year.
Now I my RN316 is broken then I try to connect these disks to another linux.
However I checked every disks, somehow there is raid0x5disks and raid1 x 1disk
It looks like raid5 fall aparts into raid0 and raid1.
Is it possible to use these as raid5 forcebly??
such as 5 drives,
/dev/sdd3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 5cda431d:eb21dd6d:849d9d92:636a0c72
Name : 0a438048:FILES-1
Creation Time : Wed Jun 11 08:24:46 2025
Raid Level : raid0
Raid Devices : 5Avail Dev Size : 15618351694 (7447.41 GiB 7996.60 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=264112 sectors, after=0 sectors
State : clean
Device UUID : 6ac2adc5:992e062a:7e8aa6d7:5885b27aUpdate Time : Wed Jun 11 08:24:46 2025
Bad Block Log : 512 entries available at offset 8 sectors
Checksum : d77027db - correct
Events : 0Chunk Size : 64K
Device Role : Active device 1
Array State : AAAAA ('A' == active, '.' == missing, 'R' == replacing)
one drive is like this,
sudo mdadm --examine /dev/sdf3
/dev/sdf3:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 38792c55:ec30a05d:ef132979:1abc74c9
Name : 0a438048:FILES-0
Creation Time : Wed Jun 11 07:15:43 2025
Raid Level : raid1
Raid Devices : 1Avail Dev Size : 15618351680 (7447.41 GiB 7996.60 GB)
Array Size : 7809175808 (7447.41 GiB 7996.60 GB)
Used Dev Size : 15618351616 (7447.41 GiB 7996.60 GB)
Data Offset : 264192 sectors
Super Offset : 8 sectors
Unused Space : before=263912 sectors, after=64 sectors
State : clean
Device UUID : df652525:c37b0a23:214456ea:deba215aUpdate Time : Thu Jun 12 02:46:05 2025
Bad Block Log : 512 entries available at offset 264 sectors
Checksum : 295491c1 - correct
Events : 2
Device Role : Active device 0
Array State : A ('A' == active, '.' == missing, 'R' == replacing)
Swap area(/dev/sd*2) somehow keep raid10
sudo mdadm --examine /dev/sdf2
/dev/sdf2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 860482db:bc8f628a:3b14dc96:8fc010a0
Name : 0a438048:1
Creation Time : Wed Jun 11 07:15:43 2025
Raid Level : raid10
Raid Devices : 6Avail Dev Size : 1044480 (510.00 MiB 534.77 MB)
Array Size : 1566720 (1530.00 MiB 1604.32 MB)
Data Offset : 4096 sectors
Super Offset : 8 sectors
Unused Space : before=4016 sectors, after=0 sectors
State : clean
Device UUID : 7300c357:529e4410:a14c33fc:e11bb3c2Update Time : Wed Jun 11 17:09:12 2025
Bad Block Log : 512 entries available at offset 16 sectors
Checksum : a8d95fb5 - correct
Events : 19Layout : near=2
Chunk Size : 512KDevice Role : Active device 0
Array State : AAAAAA ('A' == active, '.' == missing, 'R' == replacing)
11 Replies
Based on what you have posted (you didn't post anything regarding the other drives), I believe your volume is named FILES, not data. The arrays shown are FILES-0 and FILES-1, and I suspect the others make up what is still called FILES. Since there cannot be more than one array with the same name, that's how they would be broken up if the OS can't figure out how to assemble them as one.
You may be able to forcibly assemble the array from SSH, but let StephenB take a look at your logs to make sure you do it right. There could be some file corruption, however. If that won't work, then recovery software might, but it's not cheap; so give StephenB a shot first.
There is /FILES however this directory is empty.
>You may be able to forcibly assemble the array from SSH, but let StephenB take a look at your logs to make sure you do it right.
If possible could I ask about this how to force assmble? for next attempt.There is /FILES however this directory is empty.
I am also seeing a couple of references to a /Second path in your logs. Did you set up another volume? (perhaps the sdg USB drive???)
Now my RN316 is broken
Can you give us more information on how it failed?
Suddenly, `/data/` was vanished. and user home data also deleted.
Suddenly, `/data/` was vanished. and user home data also deleted.
Loss of the volume is usually disk related (though it can also be triggered by a software crash or power cut). Likely nothing is wrong with the NAS hardware.
One option is to power down the NAS, reinsert the drives, and power up. Then get a full log zip file from the logs page. That will give useful info on what went wrong.
The logs would give me the information I asked for on the other thread. (As I noted there, please keep this on one thread going forward).
If you want me to look at the logs, then put the full zip in cloud storage (drop box, google drive, etc), and send me a private message (PM) with a link. Make sure the permissions are set so anyone with the link can download. You send a PM using the envelope icon in the upper right of the forum page.
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