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Forum Discussion
ReadyNAS 104 - Volume is degraded whle sync'n a new drive
Hi guys,
So I've come across a problem ...
I have got a ReadyNAS 104 with 4x 4tb Western Digital Red's, Recently the drive in bay 4 was showing as failed and the volume was degraded, so I replaced the drive with another 4tb Western Digital Red. All went as expected as the system started the sync for the new drive, the system reported the sync was going to take 70 hours. Some time through that sync the drive in bay 2 failed and even though the 2nd drive failed it would appear the sync continued, the logs then reported the sync as complete the next day.
So right now the NAS is reporting that I have used 7.64tb of data and only have 3.27tb, as it was with healthy drives. Yet when I browse to the share from my computer it shows as empty, this particular share is where all the data is currently held.
Is there a way for me to retrive that data ? Either copy/clone/replace any of disks ?
I still have the original drive I removed from bay 4 and the failed drive in bay 2 is still in the NAS.
Currently I assume if I purchase another drive and replace the bay 2 drive all the data will be erased due to not syncing correctly ?
A resoluton for this issue will be apreciated.
Kind Regards
I have listed my logs below...
Fri Apr 10 2020 10:51:17
Volume: The resync operation finished on volume data. However, the volume is still degraded.
Fri Apr 10 2020 10:50:32
Disk: Disk in channel 4 (Internal) changed state from RESYNC to ONLINE.
Fri Apr 10 2020 1:00:14
Volume: Volume data is Degraded.
Thu Apr 9 2020 1:00:24
Volume: Volume data is Degraded.
Wed Apr 8 2020 18:29:35
Volume: Resyncing started for Volume data.
5 Replies
Powering down the NAS and cloning the disks would improve the odds of data recovery. Anything written to the data volume will make it much more difficult.
Netgear offers a data recovery service: https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service
Users here have also used ReclaiMe software with some success. You will need to find a way to connect the drives to a PC. https://www.reclaime.com/
Thanks StephenB.
Can you please confirm that if I clone the failed disk to a new drive and insert into the NAS in the same bay will the NAS see it as the same disk and act accordinaly ?
I suppose what I'm asking here is... Does the NAS recognice the data on he disk (meaning I can clone and replce as many times as I want) or does it use some kind of hardware identification such as disk serial numbert ect. (meaning I can only ever use the original disk) ?Cheers
Scott_NAS wrote:
Can you please confirm that if I clone the failed disk to a new drive and insert into the NAS in the same bay will the NAS see it as the same disk and act accordinaly ?
The NAS will see that it is part of the volume, and will include it when it assembles the RAID array. Note you need to insert it into the NAS with the NAS powered down.
What happens then depends on the a lot of factors. There is a transaction count on each disk that is used to determine if the array is in sync. If it's out of sync the NAS won't mount the volume. Another potential issue is that when you clone a failing disk, the bad sectors can't be copied. So there can be corruption in individual files (and if the folder structures aren't intact there can be missing files, corrupted file names, etc).
So you also want to boot up the NAS as read-only - preventing writes to the volume, that could interfere with potential data recovery in the future.
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