Worrying and weird that login as root is hanging, are /dev/sdb or /dev/sdf your boot drive(s)?
Are you accessing this via the Web-Shell or SSH, if one isn’t working, have you tried the other?
Also - your initial mention of the box being unresponsive and this new mention of the shell hanging as root, you might be running into this issue that has been picked up with the release of Dragonfish. Worth having a look to see if this fixes things.