Announcing OpenSolaris Project COMSTAR: Common Multiprotocol SCSI Target
By st0rage on Aug 16, 2007
COMSTAR is the software framework to use a Solaris host as a SCSI Target platform. COMSTAR uses a modular approach to break the huge task of handling all the different pieces in a SCSI target subsystem into independent functional modules, which are glued together by the SCSI Target Mode Framework (STMF). The modules implementing functionality at SCSI level (disk, tape, medium changer etc.) are not required to know about the underlying transport. And the modules implementing the transport protocol (Fibre Channel, iSCSI etc.) are not aware of the SCSI-level functionality of the packets they are transporting. The framework hides the details of allocation, providing execution context and cleanup of SCSI commands and associated resources, and simplifies the task of writing the SCSI or transport modules.