ReadyNas Duo v1 keeps locking up (inaccessible)

Hello everyone,

My ReadyNas Duo has been running faultlessly for years then suddenly I noticed is was offline in my LAN and I couldn't access Frontview in a browser. The device seemed to have frozen and it wouldn't shut down normally using the power button, I had to pull the cable. When restarting it the fans whirred noisily as usual but it didn't boot up properly and become usable again, Frontview was still inaccessible. the only way I could regain access to Frontview was rebooting with the reset button at the rear depressed and even then the NAS fell over again at some point during the day, I just can't get it stable. here's the system:

Model:	ReadyNAS Duo [X-RAID]
Serial:	24M4137000BAA
Firmware:	RAIDiator 4.1.14 [1.00a043]
Memory:	256 MB [2.5-3-3-7]
IPv4 address::	192.168.0.11
Volume C:	Online, X-RAID, 2 disks, 50% of 1846 GB used

After doing some searching here I've enabled SSH and done a 'df -h'

Filesystem            Size  Used Avail Use% Mounted on
/dev/hdc1             1.9G  772M  1.1G  39% /
tmpfs                  16k     0   16k   0% /USB
/dev/c/c              1.8T  927G  919G  51% /c

It's at this point I'm a bit stumped with what to do next. I've used a bash terminal a bit before in the past but I don't really know how to go about troubleshooting this.

Can anyone help?

Thanks