Readynas 316 - No Volume Exists after suspected HDD crash

[Dekina]

Hi, 

I have a Detected high uncorrectable Error Count on disk 6.

The disk had an error on the log about 4 months ago with increasing pending sector count, after about a week the increasing pending sector count error disapeared and disk were working correctly.

I have not looked at the logs for the last few weeks, i did a reboot on the device and now there is an error stating that no volume exist. The NAS had 4 hard drives running raid 5, the volumes were about 68% capacity.

In hindsight i should have replaced the defective hard drive when error first happened. I don't want to go and just swap out the faulty drive at this time.

Any assistance would be greatly appreciated. 

This is a screen shot of the volumes page

 

[mdgm-ntgr]

My guess without knowing the disk health would be that you could have problems with multiple hard disks. This looks like a data recovery situation.

Do you have a backup?

[Dekina]

Hi,

Thanks for the quick reply.

No back up as this is the back up device.

The logs say only 1 one disk has the issue, all others ok.

Should i try to restart the NAS and see if the volume is detected? 

The blue light next to the disks are all solid on the good drives and flashing on the failed one.

[StephenB]

Can you post the health info?  Either disk_info.log or smart_history.log should work.

[Dekina]

Hi,

As requested.

Device: sda
Controller: 0
Channel: 0
Model: ST4000DM000-1F2168
Serial: Z300V2KQ
Firmware: CC52
Class: SATA
RPM: 5900
Sectors: 7814037168
Pool: data
PoolType: RAID 5
PoolState: 5
PoolHostId: ed5efb4
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
End-to-End Errors: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 35
Start/Stop Count: 98
Power-On Hours: 33059
Power Cycle Count: 98
Load Cycle Count: 98

Device: sdb
Controller: 0
Channel: 2
Model: ST4000DM000-1F2168
Serial: Z300VWVX
Firmware: CC52
Class: SATA
RPM: 5900
Sectors: 7814037168
Pool: data
PoolType: RAID 5
PoolState: 5
PoolHostId: ed5efb4
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
End-to-End Errors: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 36
Start/Stop Count: 93
Power-On Hours: 32991
Power Cycle Count: 93
Load Cycle Count: 93

Device: sdc
Controller: 0
Channel: 3
Model: ST4000DM000-1F2168
Serial: Z300VW4Q
Firmware: CC52
Class: SATA
RPM: 5900
Sectors: 7814037168
Pool: data
PoolType: RAID 5
PoolState: 5
PoolHostId: ed5efb4
Health data
ATA Error Count: 0
Reallocated Sectors: 0
Reallocation Events: 0
Spin Retry Count: 0
End-to-End Errors: 0
Command Timeouts: 0
Current Pending Sector Count: 0
Uncorrectable Sector Count: 0
Temperature: 36
Start/Stop Count: 93
Power-On Hours: 32994
Power Cycle Count: 93
Load Cycle Count: 923

Device: sde
Controller: 0
Channel: 5
Model: ST4000DM000-1F2168
Serial: Z300T6YY
Firmware: CC52
Class: SATA
RPM: 5900
Sectors: 7814037168
Pool: data
PoolType: RAID 5
PoolState: 5
PoolHostId: ed5efb4
Health data
ATA Error Count: 334
Reallocated Sectors: 712
Reallocation Events: 712
Spin Retry Count: 0
End-to-End Errors: 0
Command Timeouts: 9
Current Pending Sector Count: 3992
Uncorrectable Sector Count: 3992
Temperature: 35
Start/Stop Count: 98
Power-On Hours: 33060
Power Cycle Count: 98
Load Cycle Count: 98

Thanks

[StephenB]

So it does look like it's only a single disk problem.  So it's odd that the volume is gone.  Perhaps wait for @mdgm-ntgr to reply on next steps.

[Dekina]

Thank you StephenB