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NVM Express

Revision 1.3d

NVM Express

Base Specification

NVM Express

Revision 1.3d

March 20, 2019

Please send comments to info@nvmexpress.org

Incorporates ECN 001 to ECN 003, ECN 004a, ECN 005, and ECN 006. Applied the NVM Express

trademark and logo usage guidelines.

NVM Express

Revision 1.3d

NVM Express

base specification revision 1.3d is available for download at http://nvmexpress.org. NVM

Express revision 1.3 ratified on April 26, 2017. NVM Express base specification revision 1.3d incorporates

ECN 001 to ECN 003, ECN 004a, ECN 005, and ECN 006. Applied the NVM Express trademark and logo

usage guidelines.

SPECIFICATION DISCLAIMER

LEGAL NOTICE:

This NVM Express base specification revision 1.3d is proprietary to the NVM Express, Inc. (also referred

to as “Company”) and/or its successors and assigns.

NOTICE TO USERS WHO ARE NVM EXPRESS, INC. MEMBERS: Members of NVM Express, Inc. have

the right to use and implement this NVM Express base specification revision 1.3d specification subject,

however, to the Member’s continued compliance with the Company’s Intellectual Property Policy and

Bylaws and the Member’s Participation Agreement.

NOTICE TO NON-MEMBERS OF NVM EXPRESS, INC.: If you are not a Member of NVM Express, Inc.

and you have obtained a copy of this document, you only have a right to review this document or make

reference to or cite this document. Any such references or citations to this document must acknowledge

NVM Express, Inc. copyright ownership of this document. The proper copyright citation or reference is as

citations or references to this document you are not permitted to revise, alter, modify, make any

derivatives of, or otherwise amend the referenced portion of this document in any way without the prior

express written permission of NVM Express, Inc. Nothing contained in this document shall be deemed as

granting you any kind of license to implement or use this document or the specification described therein,

or any of its contents, either expressly or impliedly, or to any intellectual property owned or controlled by

NVM Express, Inc., including, without limitation, any trademarks of NVM Express, Inc.

LEGAL DISCLAIMER:

THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN IS PROVIDED ON AN “AS IS”

BASIS. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, NVM EXPRESS, INC.

(ALONG WITH THE CONTRIBUTORS TO THIS DOCUMENT) HEREBY DISCLAIM ALL

REPRESENTATIONS, WARRANTIES AND/OR COVENANTS, EITHER EXPRESS OR IMPLIED,

STATUTORY OR AT COMMON LAW, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, VALIDITY,

AND/OR NONINFRINGEMENT.

All product names, trademarks, registered trademarks, and/or servicemarks may be claimed as the

property of their respective owners.

The NVM Express

design mark is a registered trademark of NVM Express, Inc.

NVM Express Workgroup

c/o VTM, Inc.

3855 SW 153

Drive

Beaverton, OR 97003

info@nvmexpress.org

NVM Express
TM
 Revision 1.3d 
 
3
Table of Contents 
INTRODUCTION ............................................................................................................. 6 
1  Overview ......................................................................................................................................... 6 
2  Scope .............................................................................................................................................. 6 
3  Outside of Scope ............................................................................................................................ 6 
4  Theory of Operation ........................................................................................................................ 6 
5  Conventions .................................................................................................................................. 12 
6  Definitions ..................................................................................................................................... 13 
7  Keywords ...................................................................................................................................... 16 
8  Byte, word and Dword Relationships............................................................................................ 18 
9  References ................................................................................................................................... 18 
10  References Under Development ............................................................................................... 19 
SYSTEM BUS (PCI EXPRESS) REGISTERS ....................................................................... 20 
1  PCI Header ................................................................................................................................... 20 
2  PCI Power Management Capabilities ........................................................................................... 24 
3  Message Signaled Interrupt Capability (Optional) ........................................................................ 25 
4  MSI-X Capability (Optional) .......................................................................................................... 27 
5  PCI Express Capability ................................................................................................................. 28 
6  Advanced Error Reporting Capability (Optional) .......................................................................... 34 
7  Other Capability Pointers .............................................................................................................. 38 
CONTROLLER REGISTERS ............................................................................................. 39 
1  Register Definition ........................................................................................................................ 40 
2  Index/Data Pair registers (Optional) ............................................................................................. 51 
DATA STRUCTURES ..................................................................................................... 53 
1  Submission Queue & Completion Queue Definition ..................................................................... 53 
2  Submission Queue Entry – Command Format ............................................................................. 55 
3  Physical Region Page Entry and List ........................................................................................... 59 
4  Scatter Gather List (SGL) ............................................................................................................. 60 
5  Metadata Region (MR) ................................................................................................................. 66 
6  Completion Queue Entry .............................................................................................................. 67 
7  Controller Memory Buffer ............................................................................................................. 73 
8  Namespace List ............................................................................................................................ 74 
9  Controller List ................................................................................................................................ 74 
10  Fused Operations...................................................................................................................... 75 
11  Command Arbitration ................................................................................................................ 75 
ADMIN COMMAND SET ................................................................................................. 79 
1  Abort command ............................................................................................................................ 81 
2  Asynchronous Event Request command ..................................................................................... 82 
3  Create I/O Completion Queue command ..................................................................................... 85 
4  Create I/O Submission Queue command ..................................................................................... 87 
5  Delete I/O Completion Queue command ..................................................................................... 89 
6  Delete I/O Submission Queue command ..................................................................................... 89 
7  Doorbell Buffer Config command ................................................................................................. 90 
8  Device Self-test command ............................................................................................................ 91 
9  Directive Receive command ......................................................................................................... 94 
10  Directive Send command .......................................................................................................... 95 
11  Firmware Commit command ..................................................................................................... 96 
12  Firmware Image Download command ...................................................................................... 97 
13  Get Features command ............................................................................................................ 99 

NVM Express
TM
 Revision 1.3d 
 

14  Get Log Page command ......................................................................................................... 101 
15  Identify command .................................................................................................................... 120 
16  Keep Alive command .............................................................................................................. 148 
17  NVMe-MI Receive command .................................................................................................. 148 
18  NVMe-MI Send command ....................................................................................................... 148 
19  Namespace Attachment command ......................................................................................... 149 
20  Namespace Management command ...................................................................................... 150 
21  Set Features command ........................................................................................................... 152 
22  Virtualization Management command..................................................................................... 173 
23  Format NVM command – NVM Command Set Specific ......................................................... 175 
24  Sanitize command – NVM Command Set Specific ................................................................. 177 
25  Security Receive command – NVM Command Set Specific .................................................. 179 
26  Security Send command – NVM Command Set Specific ....................................................... 181 
NVM COMMAND SET ................................................................................................. 182 
1  Namespaces ............................................................................................................................... 183 
2  Fused Operations ....................................................................................................................... 185 
3  Command Ordering Requirements ............................................................................................. 186 
4  Atomic Operations ...................................................................................................................... 186 
5  End-to-end Protection Information .............................................................................................. 190 
6  Compare command .................................................................................................................... 190 
7  Dataset Management command ................................................................................................ 192 
8  Flush command .......................................................................................................................... 195 
9  Read command .......................................................................................................................... 195 
10  Reservation Acquire command ............................................................................................... 198 
11  Reservation Register command .............................................................................................. 200 
12  Reservation Release command .............................................................................................. 201 
13  Reservation Report command ................................................................................................ 202 
14  Write command ....................................................................................................................... 204 
15  Write Uncorrectable command ............................................................................................... 207 
16  Write Zeroes command ........................................................................................................... 208 
CONTROLLER ARCHITECTURE ..................................................................................... 211 
1  Introduction ................................................................................................................................. 211 
2  Command Submission and Completion Mechanism (Informative) ............................................ 211 
3  Resets ......................................................................................................................................... 218 
4  Queue Management ................................................................................................................... 219 
5  Interrupts ..................................................................................................................................... 220 
6  Controller Initialization and Shutdown Processing ..................................................................... 223 
7  Asynchronous Event Request Host Software Recommendations (Informative) ........................ 225 
8  Feature Values ........................................................................................................................... 225 
9  NVMe Qualified Names .............................................................................................................. 227 
10  Identifier Format and Layout (Informative) .............................................................................. 228 
11  Unique Identifier ...................................................................................................................... 230 
12  Keep Alive ............................................................................................................................... 232 
13  Updating Controller Doorbell Registers using a Shadow Doorbell Buffer .............................. 233 
14  Privileged Actions.................................................................................................................... 233 
FEATURES ................................................................................................................ 234 
1  Firmware Update Process .......................................................................................................... 234 
2  Metadata Handling...................................................................................................................... 235 
3  End-to-end Data Protection (Optional) ....................................................................................... 236 
4  Power Management ................................................................................................................... 243 
5  Virtualization Enhancements (Optional) ..................................................................................... 248 
6  Doorbell Stride for Software Emulation ...................................................................................... 253 

NVM Express
TM
 Revision 1.3d 
 
5
7  Standard Vendor Specific Command Format ............................................................................. 253 
8  Reservations (Optional) .............................................................................................................. 253 
9  Host Memory Buffer (Optional) ................................................................................................... 260 
10  Replay Protected Memory Block (Optional) ............................................................................ 261 
11  Device Self-test Operations (Optional) ................................................................................... 273 
12  Namespace Management (Optional) ...................................................................................... 275 
13  Boot Partitions (Optional) ........................................................................................................ 277 
14  Telemetry (Optional) ............................................................................................................... 279 
15  Sanitize Operations (Optional) ................................................................................................ 283 
DIRECTIVES .............................................................................................................. 288 
1  Directive Use in I/O Commands ................................................................................................. 288 
2  Identify (Directive Type 00h) ....................................................................................................... 289 
3  Streams (Directive Type 01h, Optional) ..................................................................................... 291 
ERROR REPORTING AND RECOVERY .......................................................................... 297 
1  Command and Queue Error Handling .................................................................................... 297 
2  Media and Data Error Handling .............................................................................................. 297 
3  Memory Error Handling ........................................................................................................... 297 
4  Internal Controller Error Handling ........................................................................................... 297 
5  Controller Fatal Status Condition ............................................................................................ 298 
 
   