The sybsystemdb Device

The sybsystemdb device stores the sybsystemdbdatabase, which stores information about transactions in progress, and which is also used during recovery.

For new installations, the master device also contains the sybsystemdb database.

The sybsystemdb database is required to support distributed transaction management (DTM) features. Before installation, make sure you have enough space available on the default segment to support sybsystemdb.