Following a Hard-drive crash, i replaced the Toshiba original HDD With a brand new Seagate ST500LT012-1DG142 Media Hard Drive.
The OS X Mountain Lion installation went fine, however i'm stuck at the white screen durring boot. after a few minutes the question-marked folder shows up.
The workaround i've found is booting with a Ubuntu live USB key. In that case, the HDD is seen in ubuntu, i can browse it just fine, and if i reboot after opening a session in Ubuntu, MacOs Boots up normally.. oO So i assume it's not a hardware problem. Partitions seems to be okay as well, diskutil list output :
/dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 499.2 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3
Any ideas? Is there any way to check the EFI Partiton? OS X works fine in itself, and i'd appreciate to avoid a re-install, as my bandwith is not so good it takes a lot of time...