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Forum Discussion
ReadyNAS 214 Volume degraded Replacement disk showing state UNKNOWN
Disk 4 failed. Replaced and started to resynch. Then stopped and said volume degraded. Attempted formatting drive, powering off and on NAS. Somtimes it would re-start a synch and then stop again. Som...
Do you have an up-to-date backup of your data? If not, I think making a backup is the next step.
Hi Stephen,
No, I don't have a backup. The NAS is used to backup various home laptops and I don't have anything with similar capacity to back it up to. If I loose the data, it just means I loose a series of old backups.
Bit annoying as I have a couple of ReadyNAS and each has suffered a disk failure and neither has recovered from it properly. Suggests the RAID implementation is poor.
Further problem is that the warranty replacement Seagate IronWolf disk is a refurbished unit and that appears to now be reporting errors.
Sep 11, 2021 08:17:10 PM Disk: Detected high command timeouts: [47] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy. Sep 11, 2021 07:46:47 PM Disk: Detected high command timeouts: [44] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy. Sep 10, 2021 12:36:53 PM Disk: Detected high command timeouts: [43] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy.
Froglet0 wrote:
Suggests the RAID implementation is poor.
The RAID implementation is a standard linux tool called MDADM. Though I agree that the actual status doesn't seem to be properly reported in the admin web ui.
Froglet0 wrote:
Further problem is that the warranty replacement Seagate IronWolf disk is a refurbished unit and that appears to now be reporting errors.
Sep 11, 2021 08:17:10 PM Disk: Detected high command timeouts: [47] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy. Sep 11, 2021 07:46:47 PM Disk: Detected high command timeouts: [44] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy. Sep 10, 2021 12:36:53 PM Disk: Detected high command timeouts: [43] on disk 4 (Internal) [ST8000VN004-2M2101, WKD2LAF5]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy. I'd contact them and tell them that the replacement disk isn't working correctly. This could well be the actual problem, not a "further problem"
You could try running the disk test from the volume settings wheel. It might also be useful if you could download the full log zip file, and post mdstat.log (copy/paste it into your reply).
Command time-outs can be due to a problem with the NAS, not the drive. If you were not having any of them with the old drive and now are, it's not likely. But you could power down, swap that drive with another, and power back up, then see if the errors follow the drive or slot.
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