After update firmware 6.4.0, RN10400 doesnt boot

This readynas has been acting up for the past year...it hangs after doing backups and I have to hard boot by unplugging the power.  GUI and RAIDar or ssh do not work to access the NAS.  I suspect a memory leak and have been updating the firmware in the hopes that some day Netgear will fix this issue.  I updated from 6.2.x to 6.4.0...BIG MISTAKE.  I should have known not to update to a 6.4.0 version...x.0 versions have all kinds of bugs in them...even though they are "tested'  Well the first boot took forever as I think they have done something to scan the file system everytime it but.  They are also displaying the snap shot space now which is probably slowing everything down too.   I think it is scanning the snapshot now too. 

Well the backups hung up the unit again this weekend as usual and now I rebooted and it is stuck in booting.and the activity light is solid.  Of course Netgear wants me to pay for this issue as it is my fault.  The power klight is blinking solid and I can ping the unit but can not access raidar or the GUI admin page.  Any suggestions would be appreciated. 

If I dont get any I will be trying to boot to the USB recovery stick and see about re-install or do some disk test...  As a last resort I will have to pay Netgear and hopefully they can fix this issue and revert the firmware back to 6.2.x...