SCSI Target-Mode Overview

The SCSI target-mode interface is intended to be used with the SCSI initiator-mode interface to provide the equivalent of a full-duplex communications path between processor type devices. Both communicating devices must support target-mode and initiator-mode.

To work with the SCSI subsystem in this manner, an attached device's target-mode and initiator-mode interfaces must meet certain minimum requirements:

• The device's target-mode interface must be capable of receiving and processing at least the following SCSI commands:
  • send
  • request sense
  • inquiry
  The data returned by the inquiry command must set the peripheral device type field to processor device. The device should support the vendor and product identification fields. Additional functional SCSI requirements, such as SCSI message support, must be addressed by examining the detailed functional specification of the SCSI initiator that the target-mode device is attached to.
• The attached device's initiator mode interface must be capable of sending the following SCSI commands:
  • send
  • request sense
  In addition, the inquiry command should be supported by the attached initiator if it needs to identify SCSI target devices. Additional functional SCSI requirements, such as SCSI message support, must be addressed by examining the detailed functional specification of the SCSI target that the initiator-mode device is attached to.