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Forum Discussion
RN104 "No Volume Exists" error
I use My RN104 NAS as primary network storage. It has four 4TB drives (originally x2 but an additional pair was added ~4 months ago). During the last days, the storage was not accessible over th...
See below an extract of the error log
...and the key messages summarised here:
| Sun Apr 23 2023 21:54:54 | Disk: Disk in channel 1 (Internal) changed state from ONLINE to FAILED. |
| Mon Apr 24 2023 4:18:46 | Volume: Volume data is Degraded. |
| Wed May 3 2023 18:07:45 | Volume: Volume data health changed from Degraded to Dead |
| Wed May 3 2023 18:07:46 | Disk: Disk in channel 2 (Internal) changed state from ONLINE to FAILED. |
| Wed May 3 2023 18:08:29 | Disk: Detected high uncorrectable error count: [56] on disk 2 (Internal) [ST4000VN000-1H4168, Z300TWD3]. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy |
Your log shows two disk failures (one on April 23, the second on May 3rd). RAID-5 can handle one failed disk, but not two.
Do you have a backup of the data?
Hi StephenB,
Thank you for your reply.
Indeed it seems I have experienced two failures, with just over one week interval between.
I have no backup of the data.
Before the errors, I believe I had an x-raid configuration with 4x 4TB drives. The first error occurred on slot1, the original data drive. The final error occurred on slot2 (the parity drive).
I believe my total data usage was approx 2-3TB (i.e not exceeding the size of one physical drive). I think it is unlikely that any files were written to the volume during the time interval between the two failures.
Currently I am considering to mount all 4x SATA drives to a Windows PC and then to attempt to recover the volume using software such as:
"Hetman Raid recovery 2.4" or "ReclaiMe"
If you have any advice or recommendations before starting, it would be very welcome!
Kind Regards,
domg22
domg22 wrote:
If you have any advice or recommendations before starting, it would be very welcome!
I think this is a situation where you'd want to clone the failed drives before proceding with recovery.
I'd start with cloning disk 2 - if that succeeds, then perhaps try recovery with only those three drives. If not, then try to clone disk 1.
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