After some hiccups in data transfers, I rebooted my MBWEII (1TB) and when it restarted the two circles were alternately flashing. WD's website says that means "RAID degraded mode". The web admin page is accessible and shows no storage and "Drive B failure". Does that mean Drive B is toast and its data gone? I was using RAID0. I have SSH access and see that the /shares/internal/ directory is empty. I'm a Linux noob, but I have a friend that's good with Linux and just need to know what the error means and get pointed in the right direction to fix it please. The drive had about 600GB on it. Would some of that still be accessible on Drive A or is data scattered across both drives?
fdisk -l shows /dev/sda and /dev/sdb are present but I don't know how to access them.