This is a bit worrying as I would really, really like to retrieve some of the data held on the disk. Would the best way be to disassemble the unit and mount the disk in a carrier (or directly in a PC) and try and get stuff off that way or are there things I could try first?
I'm not a Linux/Unix person - Windows 7 is the limit of my computing ability - so, if you can help, please can you try and keep it simple?
The only way you can get the data of the your NAS HDD when you take it out is connected it to Linux running machine and mount the /dev/sdc6 partition where the data is stored,
as your NAS using is running Linux OS and the drive is formatted as follows (example of my 2TB drive):
/dev/sdc1 1.0 GB ext3
/dev/sdc2 5.1 GB Unknown
/dev/sdc3 1.0 MB Unknown
/dev/sdc4 1.0 MB Unknown
/dev/sdc5 1.0 GB Swap Space
/dev/sdc6 2.0 TB xfs
Try LiveCD of Ubuntu distribution for example as this will not install anything on your Windows PC, get an external drive once booted into the Live CD,
connect it (may have to install NTFS suppoprt "sudo apt-get install ntfs-3g") to backup your NAS data. I have been able to save all of ma data from
failing NAS HDD.