I have a Lion 10.7.6 system (on MacBook pro 13" 2011) which doesn't boot anymore after a restart. My HD was encrypted with FileVault ,i had turn off filevault and then decryption of disk was started but accidently i had turn off my laptop and process was interputed and after I click on my username and enter my password, it appears to be logging in but the apple logo turns into sort of a "forbidden" traffic sign, and stops there forever. So I booted into Lion Recovery to try and repair permissions, but Disk Utility won't mount my Macintosh HD.when i varify or repair disk,it show unrecognized with error (-69846).i have tried all solution using diskutil command. An output from diskutil list recognizes my partition (/dev/disk0s2) as having the type FFFF-FFFFFFFFFFF-FFFF-FFFF. Any way to make my encrypted partition mount?