I've spent the afternoon to debug this new ReadyNas Duo v2 that I've sold to my customer to replace a Qnap TurboNas TS-219PII with a hardware problem.
First, I've ran into most read issues I've been done to read around but finally I've got everything to work. So I've found nice to register in this forum to post the solution to this common unsolved issue.
Issue details :
You got the message "Device is Offline, please wait".
Not Good :
You can try to reinstall the OS with the boot menu but you will loose time and get the same error.
You can format the disk and start over but it's not the good solution.
Launch putty.exe (if you are under windows, if not, use xterm or whatever) to connect the nas using ssh.
Putty client can be download from chiark web page.
username : root
password : password (by default, or your web admin password)
Once logged in, type :
NAS-console# cd /tmp
NAS-console# rm -rf *
NAS-console# rm -rf .*
Refresh your webpage admin with F5 (if you are under windows).
Issue over : you can see the interface with current parameters and pictures.
Hope you didn't find out before.