hi guys, I have a 2011 MacBook Pro. I'm trying to reinstall Lion from an installation dvd but i get this windows saying that my hard disk is locked. i tried the "chflags nouchg /Volumes/volume" commands to unlock it in the single user and then fsck -fy command to repair the disk but i get this:
** /dev/rdiskos2
** Root file system
Executing fsck_hfs (version diskdev_cmds-540.1~34).
**Verifying volume when it dismounted with write access.
journal need to be replayed but volume is read-only
**checking Journaled HFS Plus volume.
The volume is Macintosh HD
Invalid extent entry
(8,0)
**The volume Macintosh HD could not be verified completely.
/dev/rdisk0s2 (hfs) EXITED WITH SIGNAL 8
I dont know what to do, pliz I need help
** /dev/rdiskos2
** Root file system
Executing fsck_hfs (version diskdev_cmds-540.1~34).
**Verifying volume when it dismounted with write access.
journal need to be replayed but volume is read-only
**checking Journaled HFS Plus volume.
The volume is Macintosh HD
Invalid extent entry
(8,0)
**The volume Macintosh HD could not be verified completely.
/dev/rdisk0s2 (hfs) EXITED WITH SIGNAL 8
I dont know what to do, pliz I need help