DSM-G600, DNS-3xx and NSA-220 Hack Forum

I posted a thread last weekend looking for assistance for recovering a missing folder. I incorrectly thought my DNS 323 had changed RAID type, but that was not the case and now I better understand the problem.

I have two identical Seagate 1TB hds, configured using RAID1

Here is a recap as to what happened:

The folder that has disappeared was mounted and being accessed by my laptop. Instead of shutting down the laptop I put it in hibernate.
I also shutdown the DNS using the power button.
Coming back from work, I started up the DNS, then held down the reset button for five seconds, the main power button was flashing.
When the reset was complete, I went to access the DNS via Samba, everything appeared to be there except the one folder that was mounted earlier.

Connecting onto Telnet, I have found the missing folder in two locations and with no content.

The folders that appear fine are located in "/mnt/HD_a2/". My missing directory is located in "/mnt/HD_a4/" & "/mnt/HD_b4/"

I also ran the tool on Telnet to check the condition of the HDs & the consistency of the RAID, nothing to suggest that the RAID has degraded or that one of the HDs has failed. What is worrying is that when looking at the amount of disk space left, is only counted the memory taken by the folders that have not dissappeared.

I have also upgraded the firmware to 1.08.

I have read that I should try using e2fsck, but I have no idea what exactly this does. Could somebody PLEASE PLEASE help, I cannot believe for a second that the missing folder has been deleted/currupted or is irrecoverable - otherwise this is an awful product if folders are destroyed just by trying to reset to factory defaults.

Thanks