RN424 , 4x 8TB WD Red Plus failing after 120 days?

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berillio wrote:

This problem is with a RN424 with 4x 8TB WD80EFAX, all identical HDs purchased at the same time as the 424. The system has 6.10.4 Hotfix1 and has been up for 120 days, I had not even transferred all the files on it yet

 

Status.log simply says

[21/07/30 12:20:38 GMT] warning:disk:LOGMSG_DELETE_DISK Disk Model:WDC WD80EFAX-68KNBN0 Serial:VGJL3SDG was removed from Channel 2 of the head unit.

[21/07/30 12:20:41 GMT] warning:volume:LOGMSG_HEALTH_VOLUME Volume data health changed from Redundant to Degraded.”

 

(yes I can PHISICALLY remove the disk and test it)

 

Is it possible for the RN424 to “misdiagnose” an otherwise healthy disks or to suffer an hardware fault?

 

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Disks can fail at any time, so it would be useful to test it in the PC.    

The bay in the NAS might also have failed - if you have a spare disk, you might try doing a factory install (with only the spare disk inserted, in bay 1).  Then power down and move the disk to bay 2.  Power up, and make sure it works. If you try this test, label the disks by slot as you remove them.

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berillio wrote:

 

But what should I do now

1. a) should I switch the RN424 off and take it offline? I can copy the few folders I would be working on RN214B and continue there for some time.
2. b) should I MOVE data back to other NASes freeing space (but that would not do anything, the Volume is degraded because one disk is missing, it will remain degraded: the only advantage would be that – if there is another HD fault, I would have lost less data – mott point, maybe.

I suggest running the disk test on the RN424 before you copy new data onto it (look on the volume settings wheel for the disk test).  That will take a while, and you can test disk 2 in a Windows PC in parallel.  Once you know the disk health, you can sort out the path forward.

Since the volume is degraded, the data is at more risk than your other NAS.  If a second disk fails in the RN424, you will lose the data on it.  So finding a way to back up the critical data on the RN424 would be prudent. 

Do you have a backup plan in mind for the RN424?  Ideally you'd move everthing on to it, and use the RN214s as backups.