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Forum Discussion
mvlaran
Oct 11, 2022Aspirant
Volume Degraded without errors
Hello! I have a ReadyNas 104 with 2 WDC WD40EFRX-68WT0N0 4TB NAS HDs. Out of the blue, the system started to show the 2nd HD as DEGRADED. I have destroyed, reseted the hole system and for...
StephenB
Oct 11, 2022Guru - Experienced User
mvlaran wrote:
Any suggestions on what to do?
Replace the disk.
Getting another WD40EFRX is fine, you could also get a 4 TB Seagate Ironwolf. Avoid the WD40EFAX, as it is SMR.
mvlaran wrote:
If I plug the HD in another CPU, I can format and use the HD without any warnings or errors.
Not a definitive test. You could try testing it with WD's dashboard software. But it's pretty clear that the NAS is not happy with the disk.
mvlaran
Oct 11, 2022Aspirant
That's what I'm thinking, replacing the disc! I've already disconnected it.
Is it possible to downgrade the RAID 1 to JBOD so the unit stop flashing "DEGRADED" all over while I can't afford a new disc? (I'm brazillian, it's very expensive to buy a new HD now... I will have to wait a few months until I can get a new one.
- StephenBOct 11, 2022Guru - Experienced User
mvlaran wrote:
Is it possible to downgrade the RAID 1 to JBOD so the unit stop flashing "DEGRADED" all over while I can't afford a new disc?If you are using the web ui, that would require destroying the volume and creating a new one. You'd need to reinstall any apps, recreate the shares, backup jobs, and similar stuff. And restore all the data from a backup.
There is a way to do it with the linux command line (ssh), but I don't recommend going that route unless you already are comfortable with linux. Also, it's best to make sure you have an up-to-date backup if you go that route.
FWIW, you should make sure you have your important data backed up anyway, as it is quite possible that disk 1 will fail while you are waiting.
- mvlaranOct 11, 2022Aspirant
I'm quite comfortable with linux / unix. If you have a how-to, I would like to try.
I have another backup solution besides nas, so my data is not (so much) uncovered!
- StephenBOct 11, 2022Guru - Experienced User
mvlaran wrote:
I'm quite comfortable with linux / unix. If you have a how-to, I would like to try.
Enable ssh (if not enabled already). Then log in as root, using the the NAS admin password.
The process of removing the failed drive from the array is actually pretty simple (it's much more complicated if you are removing a drive from RAID-5 or other more complicated modes). It's described in the second post here:
If you vertically expanded the volume in the past, you will have multiple RAID groups (not just md127). If that's the case, you'd need to repead his process for the other RAID groups in the volume. You might also need to do it for the OS partition (md0).
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