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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 rep...
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.
Thanks StephenB
I have ordered some replacement disks so will see if I'm able to make any progress, due to current global situations there not going to arrive for another 13 days :( I'll feedback my position once I've had a go at cloning and swaping.
On another slightly different note the display has started showing following error today... "btrfs_search_forward+2ac". The device is now unresponcive to both File Browsing and Web Portal Access, I havn't switched it off yet but I'm guessing thats still be best course of action to follow right now ?
Cheers
Scott_NAS wrote:
On another slightly different note the display has started showing following error today... "btrfs_search_forward+2ac". The device is now unresponcive to both File Browsing and Web Portal Access, I havn't switched it off yet but I'm guessing thats still be best course of action to follow right now ?
That's not a good sign. Switching it off is probably a good idea. You could also try booting it read-only.
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