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Universal Serial Bus

Mass Storage Class

UFI Command

Specification

Revision 1.0

December 14, 1998

USB Mass Storage Class – UFI Command Specification Revision 1.0

1999.01.05 2

Revision History

Rev Date Filename Author Comments

A 1998.01.22 UFI_SPEC_R1.doc Kenichi Hamada

Y-E Data, Inc.

First draft.

B 1998 03.31 UFI_RB1.DOC Kenichi Hamada First Release

C 1998.04.16 UFI-RB2.DOC Makoto Kubo

Y-E Data, Inc.

Translation of a Japanese part.

Addition of document correction and item.

D 1998.04.22 UFI-RB3.DOC Makoto Kubo Accepted USB Mass Storage specification RC2.

ADSC code changed to 0x21

v0.8 1998.10.20 ufi-cmd-v08b.doc Jim Blackson

Y-E Data, Inc.

Draft for USB Mass Storage CWG – Plano, Texas

v0.9 1998.10.22 ufi-cmd-v09.doc Jim Blackson USB Mass Storage CWG review – Plano, Texas

v1.0 1998.12.14 usbmass-ufi10.doc Updated revision number to 1.0

USB Mass Storage Class UFI Command Specification

INTELLECTUAL PROPERTY DISCLAIMER

THIS SPECIFICATION IS PROVIDED “AS IS” WITH NO WARRANTIES WHATSOEVER INCLUDING ANY

WARRANTY OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY

OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR SAMPLE.

A LICENSE IS HEREBY GRANTED TO REPRODUCE AND DISTRIBUTE THIS SPECIFICATION FOR INTERNAL

USE ONLY. NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY OTHER

INTELLECTUAL PROPERTY RIGHTS IS GRANTED OR INTENDED HEREBY.

AUTHORS OF THIS SPECIFICATION DISCLAIM ALL LIABILITY, INCLUDING LIABILITY FOR

INFRINGEMENT OF PROPRIETARY RIGHTS, RELATING TO IMPLEMENTATION OF INFORMATION IN THIS

SPECIFICATION. AUTHORS OF THIS SPECIFICATION ALSO DO NOT WARRANT OR REPRESENT THAT

SUCH IMPLEMENTATION(S) WILL NOT INFRINGE SUCH RIGHTS.

Please send comments via electronic mail to techsup@usb.org

Additional contributions made by:

Shing F. Lin Adaptec

Mark McCoy Anchor Chips Inc.

Mike Leibow eTEK Labs

David G.Lawrence Smart Technology Enablers, Inc.

Hiromichi Oribe Hagiwara Sys-Com Co., Ltd.

Yuji Oishi Hagiwara Sys-Com Co., Ltd.

Steve Bayless Hewlett-Packard

Dave Gilbert In-System Design, Inc.

David Luke In-System Design, Inc.

Darrell Redford Iomega Corporation

David Jolley Iomega Corporation

Mike Poulsen Iomega Corporation

Jim Quigley Iomega Corporation

Glen Slick Microsoft Corporation

Mark Williams Microsoft Corporation

Takashi Matsui Nanao

Ryota Okazaki NEC Corporation

Curtis E. Stevens Phoenix Technologies Ltd

Al Richey Phoenix Technologies Ltd.

Trenton Henry Standard Microsystems Corporation

Mike Nguyen TEAC America, Inc.

Tsuyoshi Osawa TEAC Corporation

Toyoko Shimizu Y-E Data, Inc.

USB Mass Storage Class – UFI Command Specification Revision 1.0

1999.01.05 3

Table of Contents

List of Tables.......................................................................................................................................... 5

List of Figures ........................................................................................................................................ 7

1. Introduction..................................................................................................................................... 8

1.1 Scope ........................................................................................................................................ 8

1.2 Terms and Abbreviations .......................................................................................................... 9

2. USB Usage .................................................................................................................................... 10

2.1 CBI: Interrupt Endpoint Required ............................................................................................ 10

2.2 CBI: Accept Device-Specific Command Request ................................................................... 10

2.3 Zero-Length Data UFI Command Blocks................................................................................ 10

3. UFI Commands ............................................................................................................................. 11

3.1 Command Block Implementation Requirements..................................................................... 12

3.1.1 Reserved.......................................................................................................................... 12

3.2 UFI Command Block Description ............................................................................................ 12

3.2.1 Operation Code................................................................................................................ 12

3.2.2 Logical Unit Number......................................................................................................... 13

3.2.3 Logical Block Address......................................................................................................13

3.2.4 Transfer Length................................................................................................................ 13

3.2.5 Parameter List Length......................................................................................................14

3.2.6 Allocation Length.............................................................................................................. 14

3.3 Status ...................................................................................................................................... 14

3.4 Immediate Command Processing Considerations.................................................................. 14

3.5 UFI Command Process Flow .................................................................................................. 14

3.6 Aborting an UFI Command......................................................................................................14

4. UFI Command Descriptions ........................................................................................................ 15

4.1 FORMAT UNIT Command: 04h .............................................................................................. 16

4.1.1 Format Parameter List ..................................................................................................... 16

4.1.2 Result Values ................................................................................................................... 18

4.2 INQUIRY Command: 12h........................................................................................................ 19

4.2.1 Standard INQUIRY Data.................................................................................................. 19

4.3 MODE SELECT Command: 55h ............................................................................................. 21

4.4 MODE SENSE Command: 5Ah .............................................................................................. 22

4.4.1 Current Values ................................................................................................................. 22

4.4.2 Changeable Values..........................................................................................................23

4.4.3 Default Values.................................................................................................................. 23

USB Mass Storage Class – UFI Command Specification Revision 1.0

1999.01.05 4

4.4.4 Saved Values ................................................................................................................... 23

4.4.5 Initial Responses.............................................................................................................. 23

4.5 Mode Select / Sense Parameters............................................................................................ 24

4.5.1 MODE Parameter List ...................................................................................................... 24

4.5.2 MODE Parameter Header................................................................................................ 24

4.5.3 Medium Type Codes ........................................................................................................ 25

4.5.4 Read-Write Error Recovery Page (01h)........................................................................... 25

4.5.5 Flexible Disk Page (05h).................................................................................................. 26

4.5.6 Removable Block Access Capabilities Page (1Bh).......................................................... 27

4.5.7 Timer and Protect Page (1Ch) ......................................................................................... 28

4.6 PREVENT-ALLOW MEDIUM REMOVAL Command: 1Eh ..................................................... 29

4.7 READ(10) Command: 28h ...................................................................................................... 30

4.8 READ(12) Command: A8h ...................................................................................................... 31

4.9 READ CAPACITY Command: 25h.......................................................................................... 32

4.10 READ FORMAT CAPACITIES Command: 23h...................................................................... 33

4.10.1 Capacity List..................................................................................................................... 33

4.10.2 Formattable Capacity Descriptors.................................................................................... 35

4.11 REQUEST SENSE Command: 03h ........................................................................................ 37

4.12 REZERO UNIT Command: 01h .............................................................................................. 39

4.13 SEEK Command: 2Bh............................................................................................................. 40

4.14 SEND DIAGNOSTIC Command: 1Dh..................................................................................... 41

4.15 START-STOP UNIT Command: 1Bh ...................................................................................... 42

4.15.1 Motor On/Off .................................................................................................................... 43

4.16 TEST UNIT READY Command: 00h....................................................................................... 44

4.17 VERIFY Command: 2Fh.......................................................................................................... 45

4.18 WRITE(10) Command: 2Ah .................................................................................................... 46

4.19 WRITE(12) Command: AAh .................................................................................................... 47

4.20 WRITE AND VERIFY Command: 2Eh .................................................................................... 48

5. Sense Data .................................................................................................................................... 49

USB Mass Storage Class – UFI Command Specification Revision 1.0

1999.01.05 5

List of Tables

Table 1 - Required UFI Commands....................................................................................................... 11

Table 2 - Typical Command Block for Most Commands ....................................................................... 12

Table 3 - Typical Command Block for Some Extended Commands ..................................................... 12

Table 4 - UFI Commands Supported By UFI Devices........................................................................... 15

Table 5 - FORMAT UNIT Command ..................................................................................................... 16

Table 6 - FORMAT UNIT (04h) Parameter List ..................................................................................... 17

Table 7 - Defect List Header.................................................................................................................. 17

Table 8 - Format Descriptor................................................................................................................... 18

Table 9 - INQUIRY Command............................................................................................................... 19

Table 10 - INQUIRY Data Format.......................................................................................................... 20

Table 11 - MODE SELECT Command ..................................................................................................21

Table 12 - MODE SENSE Command.................................................................................................... 22

Table 13 - Page Control Field................................................................................................................ 22

Table 14 - UFI Device Mode Pages....................................................................................................... 24

Table 15 - Mode Parameter List ............................................................................................................ 24

Table 16 - Mode Parameter Header...................................................................................................... 24

Table 17 - Medium Type Codes ............................................................................................................ 25

Table 18 - Read-Write Error Recovery Page (01h) ............................................................................... 25

Table 19 - Flexible Disk Page (05h) ...................................................................................................... 26

Table 20 - Examples of transfer rates.................................................................................................... 27

Table 21 - Removable Block Access Capabilities Page (1Bh).............................................................. 27

Table 22 - Timer and Protect Page (1Bh).............................................................................................. 28

Table 23 - Inactivity Time Multiplier Values ........................................................................................... 28

Table 24 - PREVENT-ALLOW MEDIUM REMOVAL Command........................................................... 29

Table 25 - READ(10) Command............................................................................................................ 30

Table 26 - READ(12) Command............................................................................................................ 31

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lvbu_shandong

2018-04-02

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