I have new MacBookPro 17" (the one w/ Thunderbolt).
Intel i7, 8GB Ram, 750GB drive.
250GB free space
Radeon HD 6750M and Intel HD Graphics 3000

BT5R1 fails to boot. Get the following

[ 30.9888855] [drm] Initialized radeon 2.9.0 20080528 for 0000:01:00.0 on minor 0

BusyBox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu11) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) Unable to find a medium containing a live file system

Any recommendations?