US Patent 6904496 Computer system with improved write cache and method therefor

Method of operating a computer system with a central processing unit and a hard disk system coupled with the central processor, the method comprising the steps of:partitioning the hard disk into at least a bootable partition and a second partition;determining a write protection for the bootable partition;using the second partition as a write cache thereby maintaining the bootable partition;if a write protection is not set, then flushing the write cache to the bootable partition during a shutdown procedure.