http://www.droidforums.net/forum/droid-2-hacks/80080-much-simpler-guide-rooting-no-pc-required.html
# mount -o rw,remount -t ext3 /dev/block/mmcblk1p21 /system
# mount -o ro,remount -t ext3 /dev/block/mmcblk1p21 /system
recovery
http://forum.xda-developers.com/showthread.php?t=611829
flash_image
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