BIOS - Stands for Basic Input/Output System. The BIOS runs at the startup sequence where it configures devices and then boots the operating system. The function of the BIOS is so vital that the information on the BIOS is stored on a ROM chip separate from the hard drive to protect it from potential crashes.
Winchester disks - This is a former code name for an early IBM hard disk model that is sometimes still used to refer to hard drives in general.
For more information on RAID read our RAID recovery & Learn more about RAID pages
Spindle - The drive's center shaft, used to mount hard disk platters.
Bad block - A bad block is the result of a media flaw or damaged format markings which causes the data held on a block (usually the size of a sector) to be unreliable.
First conceived in 1987 by a group of Berkeley researchers, five levels of RAID were defined and three of which (Levels 1, 3 and 5) have been found to be commercially viable. Each level offers a different way of distributing data across an array of disks so that the failure of a single disc does not cause data loss. There is also a variant of RAID known as level 0 (see Striping).
Operating System - The operating system is programmed to act as an interface between the user of a computer and the computer devices. This program enables the user to operate all software applications and to conveniently access all resources available on the computer including the CPU, media drives, memory, printers and storage devices.
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