Did you rename/change something in the file system before you shat down the nas last time it worked?
No! Congratulations on retrieving your data!
I got my disks working again (not the NAS!!) using Ubuntu Live from USBdrive. Had a steep learning curve and now I'm able to make the array jump through hoops in Ubuntu, even run with just one disk (to copy data), and synchronising 2nd disk later (Raid1)!! Wasn't easy at first!! But since I need to be able to get to my data in case of a crisis/failure and I apparently cannot trust this Nas, I had to find a solution I can depend on in the future.
Want to make a copy of your data?
To get you started:http://www.pendrivelinux.com/universal- ... -as-1-2-3/
Make a little workspace for Ubuntu, for storing files or installing packages, when prompted.Be sure to have all the HDs from the Nas attached
to your pc before
you start pc with Usb ie running Ubuntu. When pc starts you get a menu, choose:´Try now´.You don´t need to install Ubuntu!!!
Then when Ubuntu has started, open a terminal window (find it: the top icon on the left side of the screen, think it´s called Dash..) and do:
It will probably prompt you, if you would like to install this package? Say yeah!
Shut down, restart ( find it: icon at right top of screen)
Now the array should mount automatically and you can make a BACKUP! Find it: At bottom left of screen with other mounted media
If you run into a problem let me know.
Usually most countries also have official Ubuntu forum in your native language.
Good luck all!