Currently Being ModeratedFeb 3, 2013 10:36 PM (in response to LSP_Sopheak)
Have you tried booting into Mountain Lion's Recovery Partition by holding down Command-R prior to the startup chime, going to the last option, and doing a Repair Disk on the Macintosh HD volume that won't boot?
Thanks for your kind responding.
I have lost Macintosh partition from Startup. May it damange my (osx) partition? How about my data?
And I won't work by Holding Key like Command-S, and other. I have tried but i won't work.
Currently Being ModeratedFeb 4, 2013 7:52 AM (in response to LSP_Sopheak)
Sounds like you messed up your GUID parittion table which tells the hardware what are your parittions on the drive.
No partitons means no OS X boot volume..
Your going to have to install Data Rescue on a external OS X boot drive to attempt to recover data off the internal hard drive (if you have one), hopefully it wasn't Filevaulted neither.
Another option is to remove the hard drive from the machine (if it's easy) and use a SATA to USB adpater with Data Rescue running on another Mac to recover files.
If you can't follow this, then have a local professioanl do it for you before you delete your data.