Failed to read last sector (390719331): Invalid argument Perhaps the volume is a RAID/LDM but it wasn't setup yet, or the wrong device was used, or the partition table is incorrect. Failed to startup volume: Invalid argument Failed to mount '/dev/disk0s1': Invalid argument The device '/dev/disk0s1' doesn't have a valid NTFS. Maybe you selected the wrong device? Or the whole disk instead of a partition (e.g. /dev/hda, not /dev/hda1)? Or the other way around?