Mirroring requires two identical drives (or, at least, a second drive larger than the first). It offers good protection against catastrophic failure of the primary drive. It does not protect against corruption of data structures caused by problems in the attached computer.
Mirroring is often implemented in hardware; in disk drivers; or in operating systems including Novell. Tekram, Buslogic, and other companies offer mirroring controllers for IDE and SCSI drives.
Return To Index Copyright 1994-2008 by Donald Kenney.