Hi There, Hoping someone can help I have a ReadyNAS 104. It had 3 4TB drives in it that were filling up so I bought a 4th 4TB drive (they all match) and popped it in. The NAS did a re-synch for about 4 days and now all my data is gone (about 8TB of personal docs, videos, pics etc) is there any way to recover the data?

n_c wrote: Thanks Sandshark I get "Command not found" when I run btrfs filesystem resize max /data You need to log in as root, not admin. The root password is the same as the admin password.

ReadyNas 104 Data Deleted | NETGEAR Communities

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StephenB
Guru - Experienced User
Dec 08, 2021
n_c wrote:

I have a ReadyNAS 104. It had 3 4TB drives in it that were filling up so I bought a 4th 4TB drive (they all match) and popped it in. The NAS did a re-synch for about 4 days and now all my data is gone (about 8TB of personal docs, videos, pics etc)

Did a disk fail during the resync?

Is it showing an inactive volume?

There are a couple of options you could pursue - unfortunately they are expensive.

One is to contract with Netgear for data recovery. They would work remotely, and charge you an hourly rate (non-refundable). https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service

Similarly, you could find another data recovery service that can handle BTRFS and RAID.

Yet another option is to use data recovery software. That will require you to connect the disks to a PC (likely using a USB chassis with multiple bays), and purchase the data recovery software. ReclaiMe is a package that sever folks here have used with success.

rn_enthusiast is a poster here who has somtimes offered help in analyzing logs, and in cases where the fix appears to be fairly straightforward has offered advice. So you could also wait a little and see if he is able to respond with similar help.
- n_c
  Aspirant
  Dec 08, 2021
  Yes, both. When I added the 4th disk, it did a resync
  
  When it was done and I was able to log into the interface again, I had a warning that all 4 disks were inactive.
  
  I stupidly decided to remove the 4th disk again and now it's doing a resync again...which will apparently take ~80hrs
  
  I was thinkining I may have to call Netgear for this already but I'll wait and see if anyone else responds
  
  thank you!
  - StephenB
    Guru - Experienced User
    Dec 08, 2021
    n_c wrote:
    
    I stupidly decided to remove the 4th disk again and now it's doing a resync again...
    
    Not the best idea. But the fact that it is resyncing is encouraging. I think it suggests that there's a good chances of getting your data back with minimal loss.

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ReadyNas 104 Data Deleted

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