System Rescue Disk – Same as Boot Disk – A disk that has magnetic tendencies (hard disk) and which aids in the loading (bootstrapped) of an operating system known as kernel. The operating systems MS-DOS and Microsoft Windows ? can be configured in the system when trying to boot off, in two ways either choose hard disk, or the floppy. There is also an option in other modern systems where a CD or removable devices can also be used. There is a special floppy disk used to boot, which can be developed in the operating system, it will help the computer to carry out the process of booting the computer even if the hard disk cannot be managed.