SCSI Automation/Drive Interface - Transport Protocol - 3 (ADT-3 r01c)

172 Pages·2017·1.702 MB·English

by  T10 Technical Committee

dpANS T10
T10/BSR INCITS 542
Revision 1c
11 January, 2017
Information technology -
Automation/Drive Interface - Transport Protocol - 3 (ADT-3)
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T10 Technical Editor: Curtis Ballard
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Telephone: [phone]
Email: Curtis dot Ballard at HPE dot com
Reference number
ISO/IEC XXXXX-XXX : 201x
ANSI NCITS 542:201x
Printed January 11, 2017
T10/BSR INCITS 542 Revision 1c 11 January, 2017
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dpANS Automation/Drive Interface - Transport Protocol - 3 (ADT-3) iii
T10/BSR INCITS 542 Revision 1c 11 January, 2017
Revision Information
Changes in the SCSI standards family list, clause 1, are never marked with change bars. Changes in other clauses
may be marked with change bars in minor (e.g., letter revisions such as ADT3r01c) revisions but are never marked
with changes bars in major revisions.
1 Approved Documents Included
No T10 approved proposals are included in ADT-3 r0. ADT-3 r0 is identical to ADT-2 r09 except that editorial
changes made by the ANSI Editor as part of the INCITS Public Review for ADT-2 appear in ADT-3 r0.
The following T10 approved proposals have been incorporated ADT-3 up to and including this revision:
Table 1 — Incorporated T10 Approved Documents (in document number order)
Doc In Document Title Document Author
Rev
15-070r1 01 ADC-4 PCL in Separate Parameters Kevin Butt (IBM)
15-179r2 01a ADT-3 SAM-5 Updates Curtis Ballard (HPE)
16-080r2 01b ADT-3: Duplicate Exchanges Kevin Butt (IBM)
16-081r1 01b ADT-3: AOE Model Kevin Butt (IBM)
15-143r2 01c ADT-3 Reset IU full device reset option Curtis Ballard (HPE)
2 Revision History
2.1 Revision 0 (14 May, 2015)
Revision 0 of ADT-3 is substantially equal to revision 9 of ADT-2. The only differences arise from changes made in
ADT-2 by the ANSI Editor during the INCITS Public Review process.
2.2 Revision 1 (05 June, 2015)
The following T10 approved proposals were incorporated in ADT-3 revision 1:
15-070r1 ADC-4 PCL in Separate Parameters [Kevin Butt, IBM]
Updated references to other standards.
2.3 Revision 1a (03 November, 2015)
The following T10 approved proposals were incorporated in ADT-3 revision 1a:
15-079r2 ADT-3 SAM-5 Updates [Curtis Ballard, HPE]
Edits accepted for incorporation during working group review of 15-077r5
Updated references to other standards.
iv dpANS Automation/Drive Interface - Transport Protocol - 3 (ADT-3)
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2.4 Revision 1b (05 July, 2016)
The following T10 approved proposals were incorporated in ADT-3 revision 1b:
16-080r2 ADT-3 Duplicate Exchanges, [Kevin Butt, IBM]
16-081r1 ADT-3 AOE Model, [Kevin Butt, IBM]
Split source from one large body file into multiple clause specific files.
2.5 Revision 1c (11 January, 2017)
The following T10 approved proposals were incorporated in ADT-3 revision 1b:
15-143r2 ADT-3 Reset IU full device reset option, [Curtis Ballard, HPE]
dpANS Automation/Drive Interface - Transport Protocol - 3 (ADT-3) v
T10/BSR INCITS 542 Revision 1c 11 January, 2017
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ANSI (r)
NCITS 542:201x
Draft
American National Standard
for Information Technology -
Automation/Drive Interface - Transport Protocol - 3 (ADT-3)
Secretariat
Information Technology Industry Council
Approved mm dd yy
American National Standards Institute, Inc.
Abstract
This standard specifies the transport requirements for the SCSI automation drive interface device. This standard
permits the SCSI automation drive interface devices to attach to application clients and provides the definitions for
their use.
This standard does not contain material related to any command structure for automation drive interface devices,
that is used in conjunction with this standard. For reference to command structure, refer to ADC-4.
Draft
dpANS Automation/Drive Interface - Transport Protocol - 3 (ADT-3) vii
T10/BSR INCITS 542 Revision 1c 11 January, 2017
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Published by
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25 West 43rd Street, 4 floor, New York, NY 10036
Copyright 2010 by Information Technology Industry Council (ITI)
All rights reserved.
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form, in an electronic retrieval system or
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Washington, DC 20005. Draft
Printed in the United States of America
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Contents
Page
Revision Information.................................................................................................................................................iv
Tables....................................................................................................................................................................xvii
Foreword..................................................................................................................................................................xx
Introduction.............................................................................................................................................................xxi
1 Scope.....................................................................................................................................................................1
2 References.............................................................................................................................................................3
2.1 Normative references......................................................................................................................................3
2.1.1 Normative references overview...................................................................................................................3
2.1.2 Approved references....................................................................................................................................3
2.1.3 References under development...................................................................................................................4
2.1.4 IETF References..........................................................................................................................................4
2.1.5 IEEE references...........................................................................................................................................4
2.2 Informative references....................................................................................................................................4
3 Definitions, symbols, abbreviations, and conventions...........................................................................................7
3.1 Definitions.......................................................................................................................................................7
3.2 Symbols and abbreviations...........................................................................................................................11
3.3 Keywords......................................................................................................................................................12
3.4 Editorial conventions.....................................................................................................................................13
3.5 Notation conventions....................................................................................................................................15
3.5.1 Notation for procedures and functions.......................................................................................................15
3.5.2 Notation for state machines.......................................................................................................................16
3.5.2.1 Notation for state machines overview.....................................................................................................16
3.5.2.2 Sub-state machines................................................................................................................................16
3.5.2.3 Transitions..............................................................................................................................................17
3.5.2.4 Messages, requests, and event notifications..........................................................................................17
3.5.3 Notation for communication sequence diagrams.......................................................................................17
4 General................................................................................................................................................................19
4.1 Architecture...................................................................................................................................................19
4.1.1 Architecture introduction............................................................................................................................19
4.1.2 ADT protocol layers...................................................................................................................................20
4.2 Default operating parameters.......................................................................................................................22
4.3 ADT state machines......................................................................................................................................23
4.3.1 Introduction................................................................................................................................................23
4.3.2 ADT Port state machine.............................................................................................................................23
4.3.2.1 ADT port state machine overview...........................................................................................................23
4.3.2.2 P0:Initial state.........................................................................................................................................24
4.3.2.2.1 State description..................................................................................................................................24
4.3.2.2.2 Transition P0:Initial to P1:Login...........................................................................................................25
4.3.2.2.3 Transition P0:Initital to P3:Logged-Out................................................................................................25
4.3.2.3 P1:Login state.........................................................................................................................................25
4.3.2.3.1 State description..................................................................................................................................25
4.3.2.3.2 Transition P1:Login to P0:Initial...........................................................................................................25
4.3.2.3.3 Transition P1:Login to P2:Logged-In...................................................................................................25
4.3.2.3.4 Transition P1:Login to P3:Logged-Out.................................................................................................25
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4.3.2.4 P2:Logged-In..........................................................................................................................................26
4.3.2.4.1 State description..................................................................................................................................26
4.3.2.4.2 Transition P2:Logged-In to P0:Initial....................................................................................................26
4.3.2.4.3 Transition P2:Logged-In to P1:Login...................................................................................................26
4.3.2.4.4 Transition P2:Logged-In to P3:Logged-Out.........................................................................................26
4.3.2.5 P3:Logged-Out state...............................................................................................................................27
4.3.2.5.1 State description..................................................................................................................................27
4.3.2.5.2 Transition P3:Logged-out to P0:Initial..................................................................................................27
4.3.2.5.3 Transition P3:Logged-Out to P1:Login.................................................................................................27
4.3.3 Link negotiation state machine..................................................................................................................27
4.3.3.1 Link negotiation state machine overview................................................................................................27
4.3.3.2 Precedence of Port Login exchanges.....................................................................................................28
4.3.3.3 Common renegotiation conditions..........................................................................................................29
4.3.3.4 N0:Idle state............................................................................................................................................29
4.3.3.4.1 State description..................................................................................................................................29
4.3.3.4.2 Transition N0:Idle to N1:Negotiating....................................................................................................30
4.3.3.5 N1:Negotiating state...............................................................................................................................30
4.3.3.5.1 State description..................................................................................................................................30
4.3.3.5.2 Transition N1:Negotiating to N0:Idle....................................................................................................30
4.3.3.5.3 Transition N1:Negotiating to N1:Negotiating........................................................................................31
4.3.3.5.4 Transition N1:Negotiating to N2:Accept Sent......................................................................................31
4.3.3.5.5 Transition N1:Negotiating to N4:Agreed..............................................................................................31
4.3.3.6 N2:Accept Sent state..............................................................................................................................31
4.3.3.6.1 State description..................................................................................................................................31
4.3.3.6.2 Transition N2:Accept Sent to N0:Idle...................................................................................................32
4.3.3.6.3 Transition N2:Accept Sent to N3:Accept ACK Sent.............................................................................32
4.3.3.7 N3:Accept ACK Sent state......................................................................................................................32
4.3.3.7.1 State description..................................................................................................................................32
4.3.3.7.2 Transition N3:Accept ACK Sent to N0:Idle..........................................................................................32
4.3.3.8 N4:Agreed state......................................................................................................................................32
4.3.3.8.1 State description..................................................................................................................................32
4.3.3.8.2 Transition N4:Agreed to N0:Idle...........................................................................................................33
4.3.4 Transmitter state machine.........................................................................................................................33
4.3.4.1 Transmitter state machine overview.......................................................................................................33
4.3.4.2 T0:Entering state.....................................................................................................................................34
4.3.4.2.1 State description..................................................................................................................................34
4.3.4.2.2 Transition T0:Entering to T1:Active......................................................................................................34
4.3.4.3 T1:Active state........................................................................................................................................34
4.3.4.3.1 State description..................................................................................................................................34
4.3.4.3.2 Transition T1:Active to T2:Paused.......................................................................................................34
4.3.4.4 T2:Paused state......................................................................................................................................34
4.3.4.4.1 State description..................................................................................................................................34
4.3.4.4.2 Transition T2:Paused to T1:Active.......................................................................................................34
4.3.5 Transmitter error recovery state machine..................................................................................................35
4.3.5.1 Transmitter error recovery state machine overview................................................................................35
4.3.5.2 TE0:Idle state..........................................................................................................................................35
4.3.5.2.1 State description..................................................................................................................................35
4.3.5.2.2 Transition TE0:Idle to TE1:Initiating Recovery.....................................................................................35
4.3.5.3 TE1:Initiating Recovery state..................................................................................................................36
4.3.5.3.1 State description..................................................................................................................................36
4.3.5.3.2 Transition TE1:Initiating Recovery to TE0:Idle.....................................................................................36
4.3.5.3.3 Transition TE1:Initiating Recovery to TE2:Retry Initiate Recovery......................................................36
4.3.5.4 TE2:Retry Initiate Recovery state...........................................................................................................36
4.3.5.4.1 State description..................................................................................................................................36
x dpANS Automation/Drive Interface - Transport Protocol - 3 (ADT-3)