ReadyNAS 214 Volume degraded Replacement disk showing state UNKNOWN

Question

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. Sometimes it would create an additional volume data-0 that had to be deleted.

It is now sitting in the following state:

Volume is degraded, and volume size appears to represent the size with 3 of the 4 disks.

Volumne settings, however, list all 4 disks.

Disks 1 to 3 are ONLINE, Disk 4 is UNKNOWN

In the overview Disk 4 shows blue but without the Green indicator. Disk cannot be selected for format.

In the background I can hear the NAS churing the disks.

Is this system still recovering, or is it now unrecoverable?

Can I resolve the volumne degraded state by selectively deleting data, or does it need a factory reset?

Firmware: 6.10.5 Hotfix 1

Log extract:

[21/09/09 23:07:16 WEST] notice:system:LOGMSG_SYSTEM_REBOOT The system is rebooting.
[21/09/10 01:27:28 WEST] warning:volume:LOGMSG_HEALTH_VOLUME_WARN Volume data is Degraded.
[21/09/10 07:48:32 WEST] notice:disk:LOGMSG_ADD_DISK Disk Model:ST8000VN004-2M2101 Serial:WKD2LAF5 was added to Channel 4 of the head unit.
[21/09/10 07:50:06 WEST] info:volume:LOGMSG_DELETE_VOLUME Volume data-0 was deleted from the system.
[21/09/10 08:34:40 WEST] notice:volume:LOGMSG_RESILVERCOMPLETE_DEGRADED_VOLUME The resync operation finished on volume data. However, the volume is still degraded.
[21/09/10 11:13:13 WEST] notice:disk:LOGMSG_ADD_DISK Disk Model:ST8000VN004-2M2101 Serial:WKD2LAF5 was added to Channel 4 of the head unit.
[21/09/10 11:14:09 WEST] info:volume:LOGMSG_FORMAT_VOLUME_SUCCESS Disk format completed on channel 4.
[21/09/10 11:14:14 WEST] notice:volume:LOGMSG_RESILVERSTARTED_VOLUME Resyncing started for Volume data.
[21/09/10 11:39:16 WEST] notice:volume:LOGMSG_RESILVERCOMPLETE_DEGRADED_VOLUME The resync operation finished on volume data. However, the volume is still degraded.
[21/09/10 12:30:07 WEST] notice:system:LOGMSG_SYSTEM_REBOOT The system is rebooting.
[21/09/10 12:36:53 WEST] info:system:LOGMSG_START_READYNASD ReadyNASOS background service started.
[21/09/10 12:37:55 WEST] warning:volume:LOGMSG_HEALTH_VOLUME_WARN Volume data is Degraded.
[21/09/11 01:02:49 WEST] warning:volume:LOGMSG_HEALTH_VOLUME_WARN Volume data is Degraded.
[21/09/11 19:40:12 WEST] notice:system:LOGMSG_SYSTEM_REBOOT The system is rebooting.
[21/09/11 19:47:47 WEST] warning:volume:LOGMSG_HEALTH_VOLUME_WARN Volume data is Degraded.
[21/09/11 20:00:42 WEST] notice:volume:LOGMSG_RESILVERSTARTED_VOLUME Resyncing started for Volume data.
[21/09/11 20:36:33 WEST] notice:volume:LOGMSG_RESILVERCOMPLETE_DEGRADED_VOLUME The resync operation finished on volume data. However, the volume is still degraded.
[21/09/12 01:07:01 WEST] warning:volume:LOGMSG_HEALTH_VOLUME_WARN Volume data is Degraded.

disk_info.log

Device: sda
Controller: 0
Channel: 0
Model: ST8000VN004-2M2101
Serial: WKD1A746
Firmware: SC60
Class: SATA
RPM: 7200
Sectors: 15628053168
Pool: data
PoolType: RAID 5
PoolState: 3
PoolHostId: 6db84bfc
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 48
Start/Stop Count: 32
Power-On Hours: 10039
Power Cycle Count: 32
Load Cycle Count: 54948

Device: sdb
Controller: 0
Channel: 1
Model: ST8000VN004-2M2101
Serial: WKD18S54
Firmware: SC60
Class: SATA
RPM: 7200
Sectors: 15628053168
Pool: data
PoolType: RAID 5
PoolState: 3
PoolHostId: 6db84bfc
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 53
Start/Stop Count: 32
Power-On Hours: 10039
Power Cycle Count: 32
Load Cycle Count: 55105

Device: sdc
Controller: 0
Channel: 2
Model: ST8000VN004-2M2101
Serial: WKD1REXC
Firmware: SC60
Class: SATA
RPM: 7200
Sectors: 15628053168
Pool: data
PoolType: RAID 5
PoolState: 3
PoolHostId: 6db84bfc
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 54
Start/Stop Count: 20
Power-On Hours: 7919
Power Cycle Count: 20
Load Cycle Count: 38644

Device: sdd
Controller: 0
Channel: 3
Model: ST8000VN004-2M2101
Serial: WKD2LAF5
Firmware: SC60
Class: SATA
Sectors: 15628053168
Pool: data
PoolType: RAID 5
PoolState: 3
PoolHostId: 6db84bfc
Health data
ATA Error Count: 0

StephenB · Answer

Do you have an up-to-date backup of your data?&nbsp; If not, I think making a backup is the next step.

Froglet0 · Answer

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.&nbsp;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.&nbsp;Further problem is that the warranty replacement Seagate IronWolf disk is a refurbished unit and that appears to now be reporting errors.&nbsp;Sep 11, 2021 08:17:10 PM&nbsp;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&nbsp;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&nbsp;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.&nbsp;

StephenB · Answer

Froglet0&nbsp;wrote:
Suggests the RAID implementation is poor.

The RAID implementation is a standard linux tool called MDADM.&nbsp; Though I agree that the actual status doesn't seem to be properly reported in the admin web ui.
&nbsp;
Froglet0&nbsp;wrote:
&nbsp;
&nbsp;
Further problem is that the warranty replacement Seagate IronWolf disk is a refurbished unit and that appears to now be reporting errors.
&nbsp;

Sep 11, 2021 08:17:10 PM

&nbsp;

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

&nbsp;

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

&nbsp;

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.

&nbsp;

I'd contact them and tell them that the replacement disk isn't working correctly.&nbsp; This could well be the actual problem, not a "further problem"
&nbsp;
You could try running the disk test from the volume settings wheel.&nbsp; It might also be useful if you could download the full log zip file, and post mdstat.log (copy/paste it into your reply).

Sandshark · Answer

Command time-outs can be due to a problem with the NAS, not the drive.&nbsp; If you were not having any of them with the old drive and now are, it's not likely.&nbsp; But you could power down, swap that drive with another, and power back up, then see if the errors follow the drive or slot.

Froglet0 · Answer

Sandshark&nbsp;Thanks. Unfortunately I don't have a spare drive of that size, however, since I have just left if alone I have had no disk errors. Only had them whilst it was trying to resynch.Interestingly I have never been able to do a disk test on the volume. I just get 'Failed to initiate disk test. Disk command failed. Code: 14007010001'