About database devices

A database device is a portion of a disk device that is used for storage of a database and its transaction log.

An Adaptive Server installation includes the creation of a master device for the master, model and tempdb databases and another device for the storage of the sybsystemprocs database. The master device is the initial default storage device for all user-defined databases. Because the master device stores the most critical Adaptive Server system tables, it is a good idea to:

Designate other devices as default storage devices, and remove the default designation from the master device.
For ease of recovery, reserve the master device for the system databases and create additional devices for your application databases.