Mac OS X hard drive is divided into various partitions, called volume, for effective management of your precious data stored on it. Every Mac computer has a boot volume, which contains critical system files that are required for your Mac OS X operating system-based computer to boot up. These files are pretty important for booting up your system. In case the boot partition gets damaged or deleted, your system become totally unbootable and unusable. It leads to severe data loss and require Mac drive recovery solutions to fix the problem, if there is no backup in place.
The boot volume of your Mac OS X operating system contains the following files:
Mac OS X operating system.
MBR (Master Boot Record).
BootX, Mac OS X boot loader.
Operating system kernel.
Binary files that are required for multiple kernel extensions.
Mach/BSD data structures.
Init, Mach bootstrap (service naming) daemon.