SAP ASE Devices and System Databases

Devices are files or portions of a disk that store databases and database objects. You can initialize devices using raw disk partitions or operating system files.

• The master Device
  The master device contains the master, tempdb, model, and sample databases.
• The sybsystemdb Device
  The sybsystemdb device stores the sybsystemdbdatabase, which stores information about transactions in progress, and which is also used during recovery.
• The sysprocsdev Device
  The sysprocsdev devices stores the sybsystemprocs database, which contains most of the SAP-supplied system procedures.
• Optional Devices and Databases
  Optional devices and databases include the pluggable component interface (PCI) database, the sample databases, the sybsecurity device and database, and the dbccdb database.
• Using Operating System Files as Database Devices
  For devices that are initialized on operating system files, ensure that device writes occur directly on the physical media.
• Determine the Size of a Database Device
  SAP ASE requires baseline values for each database device.