Sybase IQ distributes user data across multiple disks at the application level by representing each device as a dbspace. A dbspace can be an operating system file (dbfile) or a raw disk partition. Dbspaces can contain both user data and internal database structures used for startup, recovery, backup, and transaction management
The catalog store contains the SYSTEM dbspace and up to twelve additional catalog dbspaces.
The Sybase IQ main store contains the IQ_SYSTEM_MAIN dbspace and other user dbspaces.
The Sybase IQ temporary store contains the IQ_SYSTEM_TEMP dbspace.
For more about dbspaces, see System Administration Guide: Volume 1 > Working with Database Objects.