A RAID class driver model enables users to easily combine two or more
disks into a bootable RAID system without specialized disk controllers
and allows the creation of RAID systems using disks of different types,
controllers, and interfaces. A RAID class driver is initialized in
response to the identification of a RAID controller. Disk controllers
return RAID-specific device identifications, rather than a standard disk
device identifications, for each disk to be included in the RAID system.
The RAID class driver binds a RAID-specific functional interface to each
disk having a RAID-specific device identification and combines the disks
into a disk object representing the entire RAID system. The disk object
provides the operating system with a standard disk device identification.
The operating system loads a standard disk driver to interface with the
disk object, thereby enabling transparent access to the RAID system.
