hi pixels, are all lights still a solid red?
if yes, can you shutdown the computer,
(what does the drobo do now)
if it is still on with 4 red lights, please check the activity light on the drobo, and if it is not showing activity, then please also unlug the usb cable from teh drobo.
if the unit is still remaining on for several minutes, you could try to power all off (essentially by unplugging the power cable from drobo)
then with power still off
try ejecting each drive, and firmly putting it back into its place again
then to power up the drobo again
(what happens when it starts up, are the blue leds trying to go from 1 to 10?)
one thing that may help, could be to fully block clone the drives you have, before anything else is done on them, (and then to only use the clones for further processes just in case), such as in post 7 here where another user yerry is working through a similar process: http://www.drobospace.com/forums/showthread.php?tid=144867&pid=192538#pid192538
(please do have a look through the whole thread though as there is a lot of related information and links about the exact process too)[hr]
edit: also, i may need to try such as process in the near-ish future.