scope:

This standard defines the command set extensions to facilitate operation of SCSI block devices. The clause(s) of this standard pertaining to the SCSI block device class, implemented in conjunction with the applicable clauses of the ANSI NCITS 301-199X SCSI-3 Primary Commands (SPC), fully specify the standard command set for SCSI block devices.

The objective of this standard is to provide the following:

a) Permit an application client to communicate with a logical unit that declares itself to be a direct-access device, write-once device, and optical memory device in the device type field of the INQUIRY command response data over an SCSI service delivery subsystem;

b) Define commands unique to the type of SCSI block devices;

c) Define commands to manage the operation of SCSI block devices;

d) Define the differences between types of SCSI block devices.