SCSI Commands - USB Mass Storage: Designing and Programming Devices and Embedded Hosts - page 134

Table 6-1: Mandatory SCSI commands and common optional SCSI commands
for USB mass-storage devices that comply with SBC-2 or SBC-3.
Command Code

(hex)

Required? Document

FORMAT UNIT 04 yes SBC

INQUIRY 12 yes SPC

MODE SELECT(6) 15 no SPC

MODE SELECT(10) 55 no SPC

MODE SENSE(6) 1A no SPC

MODE SENSE(10) 5A

no 1

SPC

PREVENT ALLOW MEDIUM REMOVAL 1E no SPC

READ(6) 08 SBC

yes 2

READ(10) 28 yes SBC

READ(12) A8 no SBC

READ CAPACITY(10) 25 yes SBC

READ FORMAT CAPACITIES 23 no MMC

READ TOC/PMA/ATIP 43 no MMC

REPORT LUNS A0 yes (SPC-3) SPC

REQUEST SENSE 03 yes SPC

SEND DIAGNOSTIC 1D yes SPC

START STOP UNIT 1B no SBC

SYNCHRONIZE CACHE(10) 35 no SBC

TEST UNIT READY 00 yes SPC

VERIFY(10) 2F no SBC

WRITE(6) 0A SBC

yes 2

WRITE(10) 2A no SBC

WRITE(12) AA no SBC

1

Required for some bootable devices.
2 Application clients should migrate to READ(10) and WRITE(10).