ReadyNAS 2120 Admin Web Interface - Device Offline

I have a ReadyNAS 2120 on firmware 6.2.2 that is currently reports as being offline when I try to access the administrative web interface. It does get me logged in but presents the dialog box saying it is offline. This is the second time this has occured. The last time I had to do a hard power reset to get it back, which is not the best option but the only one that was left I could find.

Here are some additional details and things tried. Since I could get into the admin interface and it seemed to be functioning in some manner, although all the "buttons" had text lables with underscores inbetween words, I was not able to get a power down to complete successfully. I also have a USB drive attached to the unit I use as a backup for the data on the NAS. The last time this happened it corrupted the USB drive and put it in a read only state because of the hard shutdown. I think I was able to eject the USB drive successfully because it went away after doing so via the web interface.

Since a shutdown in the software didn't work I tried pressing the power button on the front panel 3 times, one second apart. It did not initiate a shutdown and is still running. In some of the posts I read there is more you can do with the 6.0 version of RAIDar, I currently had t he 4.3.8 version installed, so I downloaded this version. The 6.0 version does not discover and find the NAS device but the 4.3.8 version does.

All the shares are still accessible on our local network and can be used, I just can't get to the administrative interface and manage the device. The antivirus updates, which run daily and send me an email after update are no longer running either or more accurately, I am no longer getting the emails.

Are there any other ways I can try to do a graceful shutown or am I left with doing a hard power reset again? Some files got corrupt the last time I did that and I would like to avoid that if possible this time. Also, what is causing this to happen? The unit is becomming unreliable and untrusted and I need it to be stable and not keep getting in this state.

Thanks for any help.