Special procedures are needed because of the central, controlling nature of the master database and the master device. Tables in master configure and control all Adaptive Server functions, databases, and data devices. The recovery process:
Rebuilds the master device to its default state when you first installed a server
Restores the master database to the default state
Restores the master database to its condition at the time of your last backup
During the early stages of recovering the master database, you cannot use the system stored procedures.