Syllable 0.5.1 will include an experimental SCSI bus manager and a USB "Mass Storage" driver which uses the SCSI bus manager. This is not yet a complete SCSI layer; the SCSI block device driver is currently integrated into the SCSI bus manager and only implements the most basic block device functions, but the design is flexible enough that the block device drivers can be split into seperate drivers and expanded to include more functionality and additonal SCSI devices.