Seagate XS1600LE70004 User Manual
Seagate® Nytro® 3731, 3531, 3331, and 3131
SAS SSD
Product Manual
Nytro 3731: Write Intensive (10 DWPD) Nytro 3531: Mixed Use (3 DWPD)
Capacity Standard Self-Encrypting FIPS 140-2 Standard Self-Encrypting FIPS 140-2
6400 GB -- -- -- XS6400LE70004 XS6400LE70014 --
3200 GB XS3200ME70004 XS3200ME70014 XS3200ME70024 XS3200LE70004 XS3200LE70014 XS3200LE70024
1600 GB XS1600ME70004 XS1600ME70014 XS1600ME70024 XS1600LE70004 XS1600LE70014 XS1600LE70024
800 GB XS800ME70004 XS800ME70014 -- XS800LE70004 XS800LE70014 XS800LE70024
400 GB XS400ME70004 XS400ME70014 -- -- -- --
Nytro 3331: Read Intensive (1 DWPD) Nytro 3131: Very Read Intensive (<1 DWPD)
Standard Self-Encrypting FIPS 140-2 Standard Self-Encrypting FIPS 140-2
15360 GB -- -- -- XS15360TE70004 XS15360TE70014 XS15360TE70024
7680 GB XS7680SE70004 XS7680SE70014 XS7680SE70024 XS7680TE70004 XS7680TE70014 --
3840 GB XS3840SE70004 XS3840SE70014 XS3840SE70024 XS3840TE70004 XS3840TE70014 --
1920 GB XS1920SE70004 XS1920SE70014 XS1920SE70024 -- -- --
960 GB XS960SE70004 XS960SE70014 XS960SE70024 -- -- --
100848978, Rev.C
August 2019
Revision History
Version and Date Description of Changes
Rev C, August 2019 Updated the following sections:
Cover
Section 2, Models
Section 5.2.3, Throughput Performance
Section 6.2, Endurance
Section 4.2, Performance
Rev B, April 2019 Copy-edited throughout for readability.
Updated content in the following sections:
Section 3.1, Agency and Safety Certifications
Section 4.6, Programmable drive capacity
Section 5.2.3, Throughput Performance
Rev A, January 2019 First release of the document.
© 2019, Seagate Technology LLC All rights reserved. Publication number: 100848978, Rev.C, August 2019
Seagate Technology reserves the right to make changes to the product(s) or information disclosed herein at any time without notice.
Seagate, Seagate Technology and the Spiral logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Nytro and SeaTools are either trademarks or registered trademarks of
Seagate Technology LLC or one of its affiliated companies in the United States and/or other countries. All other trademarks or registered trademarks are the propert y of their respective owners.
No part of this publication may be reproduced in any form without written permission of Seagate Technology LLC. Call 877-PUB-TEK1(877-782-8351) to request permission.
The NVMe word mark and/or NVMExpress design mark are trademarks of NVMExpress, Inc. The PCIe word mark and/or PCIExpress design mark are registered trademarks and/or ser vice marks of PCI-SIG.
When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes. Your computer’s operating system may use a different standard of measurement and report
a lower capacity. In addition, some of the listed capacity is used for formatti ng and other func tions, and thus wil l not be available for data storage. Actual quantities will vary based on various factors, including file size, file
format, features and application software. Actual data rates may vary depending on operating environment and other factors. The export or re-export of hardware or software containing encryption may be regulated by
the U.S. Department of Commerce, Bureau of Industry and Security (for more information, visit www.bis.doc.gov), and controlled for import and use outside of the U.S. Seagate reserves the right to change, without notice,
product offerings or specifications.
Contents
Seagate Technology Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Safety, Standards, and Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Agency and Safety Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.1 Regulatory Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Media description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.5 Formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.6 Programmable drive capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.7 Factory-installed options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.8 Logical Block Provisioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.8.1 UNMAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.8.2 FORMAT UNIT command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.8.3 Protection Information (PI) and Security (SED) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5. Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Internal drive characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.1 Response time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.2 FORMAT UNIT command execution time for 512-byte LBA's (minutes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.3 Throughput Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3.1 Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.3.2 Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6. Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 Read error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Endurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.3 Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3.1 Unrecoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3.2 Interface errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4 Endurance management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4.1 Wear leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4.2 Garbage collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4.3 Write amplification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4.4 UNMAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4.5 Data retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4.6 Write stream tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4.7 SSD percentage used endurance indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 3
Contents
6.5 Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.5.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.2 Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.3 Hot plugging the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.4 S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.4.1 Controlling S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.4.2 Performance impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.4.3 Reporting control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.4.4 Determining rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.4.5 Predictive failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5.5 Thermal monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.5.6 Drive Self Test (DST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.5.6.1 DST failure definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.5.6.2 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.5.6.3 State of the drive prior to testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.5.6.4 Invoking DST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.6.5 Log page entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.6.6 Abort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.7 Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.5.8 Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.5.8.1 Product repair and return information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.5.8.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7. Physical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.1.1 Conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.1.2 Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.1 Direct Current Consumption by Voltage Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.2.1.1 Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.2.2 Current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.3 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.1.1 Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.1.2 Non-operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.2 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3.4.1 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3.4.2 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.3.5 Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.3.6 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.4 Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.4.1 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8. About FIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.2 Validation Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.3 Seagate Enterprise SED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.4 Security Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9. About self-encrypting drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.1 Data encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2 Controlled access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.1 Admin SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.2 Locking SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.3 Default password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.3 Random number generator (RNG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 4
Contents
9.4 Drive locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.5 Data bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.6 Cryptographic erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.7 Authenticated firmware download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.8 Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.9 Supported commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.10 Sanitize - Cryptographic Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.11 RevertSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10. Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.1 Drive internal defects/errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.2 Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.3 SAS system errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.4 Auto-Reallocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.5 Protection Information (PI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
10.5.1 Levels of PI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
10.5.2 Setting and determining the current Type Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
10.5.3 Identifying a Protection Information drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.1 Drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.2 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11.4 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
12. Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
12.1 SAS features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
12.1.1 Task management functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
12.1.2 Task management responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
12.2 Dual port support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
12.3 SCSI commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
12.3.1 INQUIRY data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
12.3.2 MODE SENSE data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.4 Miscellaneous operating features and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
12.4.1 SAS physical interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
12.4.2 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.4.3 Connector requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.4.4 Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.4.5 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
12.4.6 SAS transmitters and receivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
12.4.7 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
12.5 Signal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.5.1 Ready LED Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.5.2 Differential signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.6 SAS-3 Specification compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
12.7 Additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 5
Seagate Technology Support Services
For Internal SSD Support, visit: https://www.seagate.com/support/products/
For Firmware Download and Tools Download for Secure Erase, visit: https://www.seagate.com/support/downloads/
For information regarding online support and services, visit: http://www.seagate.com/contacts/
For information regarding Warranty Support, visit: http://www.seagate.com/support/warranty-and-replacements/
For information regarding data recovery services, visit:
http://www.seagate.com/services-software/seagate-recovery-services/recover/
For Seagate OEM and Distribution partner and Seagate reseller portal, visit: http://www.seagate.com/partners
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 6
www.seagate.com
1. Scope
This manual describes Seagate Nytro® 3000 SAS (Serial Attached SCSI) Solid State Drives (SSD).
Seagate Nytro® 3000 SSDs support the SAS Protocol specifications described in this manual. The SAS Interface Manual
(part number 100293071) describes the SAS characteristics of this and other Seagate SAS drives. The Self- Encrypting
Drive Reference Manual, part number 100515636, describes the interface, general operation, and security features
available on Self-Encrypting Drive (SED) models.
Product data in this manual refers only to the model numbers listed in this manual. The data in this manual may
predict future generation specifications or requirements. If you are designing a system using one of the models listed
or future generation products and you need further assistance, please contact the Field Applications Engineer (FAE) or
our global support services group.
Unless otherwise stated, the information in this manual applies to standard Secure Download and Diagnostic (SD&D)
and SED models.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 7
www.seagate.com
2. Models
Table 1 - Nytro 3731: Write Intensive (10 DWPD)
3200GB XS3200ME70004 XS3200ME70014 XS3200ME70024
1600GB XS1600ME70004 XS1600ME70014 XS1600ME70024
800GB XS800ME70004 XS800ME70014
400GB XS400ME70004 XS400ME70014
Table 2 - Nytro 3531: Mixed Use (3 DWPD)
6400GB XS6400LE70004 XS6400LE70014
3200GB XS3200LE70004 XS3200LE70014 XS3200LE70024
1600GB XS1600LE70004 XS1600LE70014 XS1600LE70024
800GB XS800LE70004 XS800LE70014 XS800LE70024
Capacity Standard Self-Encrypting FIPS 140-2
Capacity Standard Self-Encrypting FIPS 140-2
Table 3 - Nytro 3331: Read Intensive (1 DWPD)
Capacity Standard Self-Encrypting FIPS 140-2
7680GB XS7680SE70004 XS7680SE70014 XS7680SE70024
3840GB XS3840SE70004 XS3840SE70014 XS3840SE70024
1920GB XS1920SE70004 XS1920SE70014 XS1920SE70024
960GB XS960SE70004 XS960SE70014 XS960SE70024
Table 4 - Nytro 3131: Very Read Intensive (<1 DWPD)
Capacity
15360GB XS15360TE70004 XS15360TE70014 XS15360TE70024
7680GB XS7680TE70004 XS7680TE70014
3840GB XS3840TE70004 XS3840TE70014
Standard
Self-Encrypting FIPS 140-2
NOTE Previous generations of Seagate SED models were called Full Disk Encryption
(FDE) models before a differentiation between drive-based encryption and
other forms of encryption was necessary.
NOTE The SED models indicated on the cover of this product manual have provisions
for "Security of Data at Rest" based on the standards defined by the Trusted
Computing Group (see http://www.trustedcomputinggroup.org).
For more information on FIPS 140-2 Level 2 certification see Section 8. About FIPS, on page 57.
For product certification status visit - http://csrc.nist.gov/groups/STM/cmvp/documents/140-1/1401vend.htm.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 8
www.seagate.com
3. Safety, Standards, and Compliance
This section describes applicable safety, certification, and compliance requirements for this device.
3.1 Agency and Safety Certifications
As a global supplier Seagate strives to deliver products compliant to many standards. Please see the document titled
‘HDD and SSD Regulatory Compliance and Safety’ found on the following Seagate website:
https://www.seagate.com/files/www-content/forms/compliance/regulatory-compliance-and-safety-100838899-A.pdf
3.1.1 Regulatory Model
The following regulatory model numbers represent all features and configurations in these series:
Table 5 - STT004 Series
XS400ME70004 XS800ME70004 XS960SE70004 XS1600ME70004
XS400ME70014 XS800ME70014 XS960SE70014 XS1600ME70014
XS800LE70004 XS960SE70024 XS1600ME70024
XS800LE70014 XS1600LE70004
XS800LE70024 XS1600LE70014
Table 6 - STT005 Series
XS3200ME70004 XS3840SE70004 XS6400LE70004 XS7680SE70004
XS3200ME70014 XS3840SE70014 XS6400LE70014 XS7680SE70014
XS3200ME70024 XS3840SE70024 XS7680SE70024
XS3200LE70004 XS3840TE70004 XS7680TE70004
XS3200LE70014 XS3840TE70014 XS7680TE70014
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 9
www.seagate.com
3.2 Reference documents
Seagate Documents
SCSI Commands
Reference Manual
SAS Interface Manual Seagate part number: 100293071
ANSI SAS documents
SFF-8144 54mm x 78.5mm Form Factor with micro serial connector
SFF-8223 2.5" Drive Form Factor with Serial Connector
SFF-8447 LBA Count for Disk Drives
SFF-8460 HSS Backplane Design Guidelines
SFF-8470 Multi Lane Copper Connector
SFF-8482 SAS Plug Connector
ISO/IEC 14776-154 Serial Attached SCSI (SAS-3) Standard (T10 INCITS 519)
ISO/IEC 14776-416 SCSI Architecture Model-6 (SAM-6) Standard (T10 INCITS 546)
ISO/IEC 14776-455 SCSI Primary Commands-5 (SPC-5) Standard (T10 INCITS 502)
ISO/IEC 14776-432 SCSI Block Commands-4 (SBC-4) Standard (T10 INCITS 506)
ISO/IEC 14776-263 SCSI Protocol Layer-3 (SPL-3) Standard (T10 INCITS 492)
Seagate part number: 100293068
NOTE SFF document available on SNIA's website:
https://ta.snia.org/higherlogic/ws/public/documents
ANSI Small Computer System Interface (SCSI) Documents
X 3 . 2 7 0 - 1 9 9 6 ( S C S I - 3 ) A r c h i t e c t u r e M o d e l
Trusted Computing Group (TCG) Documents (apply to Self-Encrypting Drive models only)
TCG Storage Architecture Core Specification, Rev. 2.01
TCG Storage Security Subsystem Class Enterprise Specification, Rev. 1.01
Self-Encrypting Drives Reference Manual
Seagate part number: 100515636
In case of conflict between this document and any referenced document, this document takes
precedence.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 10
www.seagate.com
4. General description
Seagate Nytro 3000 SAS SSDs provide high performance, high capacity data storage for a variety of systems with a
Serial Attached SCSI (SAS) interface. The SAS interface meets next-generation computing demands for performance,
scalability, flexibility, and high-density storage requirements.
Seagate Nytro 3000 SAS SSDs are random access storage devices that support the SAS Protocol as described in the
ANSI specifications, this document, and the SAS Interface Manual (part number 100293071) which describe the
general interface characteristics of this drive. Seagate Nytro 3000 SAS SSDs are intelligent peripherals that provide
level 2 conformance (highest level) with the ANSI SCSI-1 standard. The SAS system connectors, cables, and electrical
interface are compatible with Serial ATA (SATA). This gives future users the choice of populating their systems with SAS
or SATA drives. Users can leverage their existing investment in SCSI while gaining a 12Gb/s serial data transfer rate.
The SED models described in this product manual provide "Security of Data at Rest" based on the standards defined
by the Trusted Computing Group (see www.trustedcomputinggroup.org).
NOTE Never disassemble and do not attempt to service items in the enclosure. The
drive does not contain user-replaceable parts. Opening the encolosure, for any
reason, voids the drive warranty.
4.1 Standard features
Nytro 3000 SSDs have the following standard features:
3.0 / 6.0 / 12.0 Gb SAS interface
Single port or Dual port operation of the two interfaces
Support for SAS expanders and fanout adapters
T10 Write Stream support
128 - deep task set (queue)
Supports up to 32 initiators
Jumperless configuration
User-selectable logical block size (512, 520, 528, 4096, 4160, or 4224 bytes per logical block)
Industry standard SFF 2.5-inch dimensions
ECC and Micro-RAID Error Recovery
No preventive maintenance or adjustments required
Self diagnostics performed when power is applied to the drive
Vertical, horizontal, or top down mounting
Drive Self Test (DST)
Power loss data protection
Thin Provisioning with Block Unmap Support
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 11
www.seagate.com
Nytro 3000 SSD SED models have the following additional features:
Automatic data encryption/decryption
Controlled access
Random number generator
Drive locking
Up to 16 independent data bands
Cryptographic erase of user data for a drive that will be repurposed or scrapped
Authenticated firmware download
SANITIZE command support
4.2 Performance
Nytro 3000 SSDs have a firmware-controlled, multi-segmentable cache buffer that provides:
Up to 2000MB/s maximum instantaneous data transfers on dual 12Gb capable configurations.
Background processing of queue
Non-Volatile Write Cache
NOTE There is no significant performance difference between SED and standard
(non-SED) models.
4.3 Media description
The block storage media used on the Nytro 3000 is Enterprise-grade, 3D NAND Flash of eTCL cell characteristics.
4.4 Warranty
Consult a Seagate sales representative for warranty terms and conditions.
4.5 Formatted capacities
Seagate Nytro 3000 models are formatted to 512 bytes per block at time of manufacturing. The block size is
user-selectable at format time. Supported block sizes are 512, 520, 528, 4096, 4160, and 4224. Users who have the
necessary equipment can modify the data block size before issuing a format command. These users can obtain
different formatted capacities from those listed.
For models with capacities less than 8TB, the LBA count is based on the IDEMA document LBA1-03. Larger capacities
follow the SFF-8447 specification
The capacity stated is identical when the drive is formatted with or without PI enabled.
NOTE Some block sizes with PI enable might cause minor reductions in endurance
and random performance with the SE and TE models.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 12
www.seagate.com
Table 7 - Formatted Capacity Block Count (15360 GB, 7680 GB and 6400 GB models)
Table 8 - Formatted Capacity Block Count (3840GB, 3200GB, 1920GB models)
Last Logical Block Address
Block 15360 GB 7680 GB 6400 GB
Size Decimal Hex Decimal Hex Decimal Hex
512 30,001,856,512 6FC400000 15,002,931,887 37E3E92AF 12,502,446,767 2E93432AF
520 29,391,585,280 6D7E00000 14,685,538,511 36B5388CF 12,237,948,759 2D9704757
528 28,946,989,056 6BD600000 14,281,594,319 3533FD5CF 12,074,833,071 2C55FDCD7
4096 3,750,232,064 DF880000 1,854,502,927 6E89780F 1,562,805,845 5D268655
4160 3,673,948,160 DAFC0000 1,838,769,231 6D99644F 1,532,307,695 5B5528EF
4224 3,618,373,632 D7AC0000 1,801,818,183 6B659047 1,501,515,151 597F4D8F
Last Logical Block Address
Block 3840 GB 3200 GB 1920 GB
Size Decimal Hex Decimal Hex Decimal Hex
512
520
528
4096
4160
4224
Table 9 - Formatted Capacity Block Count (1600GB, 960GB, 800GB models)
Block 1600 GB 960 GB 800 GB
Size Decimal Hex Decimal Hex Decimal Hex
512
520
528
4096
4160
7,501,476,527 1BF1F72AF 6,251,233,967 1749A42AF 3,750,748,847 DF8FE2AF
7,342,769,255 1B5A9C467 6,118,974,383 16CB823AF 3,671,384,631 DAD4E237
7,140,797,159 1A99FEAE7 5,950,664,303 162AFEE6F 3,570,398,583 D4CFF577
937,684,565 37E3EE55 781,404,245 2E934855 468,843,605 1BF1FC55
919,384,615 36CCB227 772,709,551 2E0E9CAF 463,625,735 1BA25E07
900,909,095 35B2C827 756,488,551 2D171967 453,893,135 1B0DDC0F
Last Logical Block Address
3,125,627,567 BA4D4AAF 1,875,385,007 6FC81AAF 1,562,824,367 5D26CEAF
3,059,487,191 B65C11D7 1,835,692,319 6D6A711F 1,529,743,599 5B2E08EF
2,975,332,151 B157F737 1,785,199,295 6A67FABF 1,487,666,079 58ABFB9F
390,703,445 1749A955 234,423,125 DF90355 195,353,045 BA4D9D5
383,076,927 16D54A3F 229,846,159 DB32C8F 191,538,463 B6AA51F
4224
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 13
375,378,791 165FD367 225,227,279 D6CB20F 187,689,399 B2FE9B7
www.seagate.com
Table 10 - Formatted Capacity Block Count (400GB models)
Last Logical Block Address
Block 400 GB
Size Decimal Hex
512
520
781,422,767 2E9390AF
764,871,799 2D970477
528
4096
4160
4224
743,833,039 2C55FDCF
97,677,845 5D27215
95,769,231 5B5528F
93,844,703 597F4DF
4.6 Programmable drive capacity
Using the MODE SELECT command, the drive can change its capacity to less than maximum. See the MODE SELECT (6)
parameter list table in the SAS Interface Manual, part number 100293071. A value of zero in the Number of Blocks field
indicates that the drive does not change the capacity it is currently formatted to have. A number other than zero and
less than the maximum number of LBAs in the Number of Blocks field changes the total drive capacity to the value in
the Number of Blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum
capacity.
Seagate also provides SeaChest, a CLI tool for Windows and Linux operating systems to adjust capacity and perform
other drive management operations. Go to this page to download the tool:
https://www.seagate.com/support/software/seachest/
Or go here: https://github.com/Seagate/ToolBin/tree/master/SeaChest
4.7 Factory-installed options
OEMs may order the following items which are incorporated at the manufacturing facility during production or
packaged before shipping. Some options are (not an exhaustive list of possible options):
Other capacities can be ordered depending on LBA size requested and other factors.
Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection
against transit damage. Units shipped individually require additional protection as provided by the single unit
shipping pack. Users planning single unit distribution should specify this option.
The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each standard
OEM drive shipped, but extra copies may be ordered.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 14
www.seagate.com
4.8 Logical Block Provisioning
The drive follows SAS logical block provisioning where each LBA is either mapped or unmapped to physical NAND
media blocks based on user writes and unmap operations.
Behavior of logical block provisioning is found but send a READ CAPACITY 16 (9Eh) command to the drive.
Table 11 - Logical block provisioning options
Product Configuration LBPME LBPRZ
Non-SED Supported Supported
SED Supported Supported
A logical block provisioning management enabled (LBPME) bit set to one indicates that the logical unit implements
logical block provisioning management. An LBPME bit set to zero indicates that the logical unit is fully provisioned
and does not implement logical block provisioning management.
A logical block provisioning read zeros (LBPRZ) bit set to one indicates that, for an unmapped LBA specified by a read
operation, the device server sends user data with all bits set to zero to the data-in buffer. An LBPRZ bit set to zero
indicates that, for an unmapped LBA specified by a read operation, the device server may send user data with all bits
set to any value to the data-in buffer.
4.8.1 UNMAP
The UNMAP command asks the device server to break the association of a specific Logical Block address from a
Physical Block. This frees up the Physical Block from use and no longer requires it to contain user data. An unmapped
block responds to a READ command with data that is determined by the setting of the LBPRZ bit in the READ
CAPACITY parameter data.
4.8.2 FORMAT UNIT command
A device which supports Thin Provisioning is capable of performing a SCSI FORMAT UNIT command which allocates
Logical Blocks Addresses that are not linked to Physical Block Locations. A FORMAT command causes all LBAs to
become unmapped.
4.8.3 Protection Information (PI) and Security (SED)
In SCSI devices, umapped LBAs are defined as part of the Logical Block Provisioning model. Support of this model is
indicated by the LBPME bit having a value of '1' in the READ CAPACITY (16) parameter data.
When a region of LBA's are erased through cryptographic erase, as part of the erase, the LBAs are not unmapped.
If the host attempts to access an unmapped or trimmed LBA, the drive returns 0 data for unmapped LBAs. The drive
shall report a value of '0' in the LBPRZ field returned in the READ CAPACITY (16) parameter data.
If the host attempts to access an unmapped LBA on a drive that has been formatted with Protection Information (PI),
the drive shall return scrambled PI data for that LBA. Depending on the value of the RDPROTECT field in the
data-access command CDB, this may result in the drive returning a standard PI error to the host.
If the host reduces the addressable capacity of the drive via a MODE SELECT command, the drive shall unmap or trim
any LBA within the inaccessible region of the device.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 15
www.seagate.com
Additionally, an UNMAP command is not permitted on a locked band.
Table 12 - Protection Information behavior
PI Setting Disabled En able d
PROT_EN bit 0 1
LBPME bit 1 1
LBPRZ bit 1 1
PI Check Requested N/A Yes No
DATA Returned for mapped LBA 0x00 0x00 0x00
PI Returned for mapped LBA None None Scrambled PI data
PI Check Performed N/A Yes No
Error reported to Host No Yes No
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 16
www.seagate.com
5. Performance
This section provides detailed information on performance-related characteristics and features of
Seagate Nytro 3000 SAS SSDs.
5.1 Internal drive characteristics
Flash Memory Type NAND 3D eMLC and eTCL
Emulated LBA Size 512, 520, 528, 4096, 4160, or 4224
Native Programmable Page Size 8192 User Bytes
Map Unit Size 4096
Default Transfer Alignment Offset 0
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 17
www.seagate.com
5.2 Performance characteristics
5.2.1 Response time
Response time measurements are taken with nominal power at 25°C ambient temperature. The typical values in the
table below are defined as follows:
Page-to-page response time is an average of all possible page-to-page accesses for a sequentially preconditioned
drive.
Average response time is a true statistical random average of at least 5000 measurements of accesses between
programmable pages on a randomly preconditioned drive.
Table 13 - Typical Response Time (μsec)
Page to Page 115 25
Read Write Notes
Execution time measured from receipt of the
Command to the Response. Assumes no errors.
Average Latency 115 25
Typical response times are measured under
nominal conditions of temperature and voltage
as measured on a representative sample of
drives.
These drives provide the highest possible performance under typical conditions. However, due to the nature of Flash
memory technologies there are many factors that can result in values different than those stated in this specification.
5.2.2 FORMAT UNIT command execution time for 512-byte LBA's (minutes)
The device may be formatted as either a Thin Provisioned device or a Fully Provisioned device.
The default format is Thin Provisioned and is recommended for most applications.
Thin Provisioning provides the most flexibility for the device to manage the flash medium to maximize endurance.
The duration of the FORMAT UNIT command is based on capacity. The format processing rate is typically 20GB per
second. For example the 3840GB XS3840SE70004 device completes formatting in 38 seconds.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 18
www.seagate.com
5.2.3 Throughput Performance
Tab le 1 4 - Perfo rma nce
a
Performance of 3731 Write Intensive Models
Standard Model
Seagate Secure Encryption
Seagate Secure FIPS 140-2
XS3200ME70004 XS1600ME70004 XS800ME70004 XS400ME70004
XS3200ME70014 XS1600ME70014 XS800ME70014 XS400ME70014
XS3200ME70024 XS1600ME70024
Sustained Sequential 128KB Read
Transfer Rate (MB/s)
b
Sustained Sequential 128KB Write
Transfer Rate (MB/s)
b.
Sustained Random 4KB Read
Trans fer Ra te (KI OPS)
c
Sustained Random 4KB Write
Trans fer Ra te (KI OPS)
c.
Performance of 3531 Mixed Use Models
Standard Model
Seagate Secure Encryption
XS6400LE70004 XS3200LE70004 XS1600LE70004 XS800LE70004
XS6400LE70014 XS3200LE70014 XS1600LE70014 XS800LE70014
Seagate Secure FIPS 140-2
2000 2200 2200 2150
1550 1550 1550 1000
230 230 230 210
180 180 180 140
XS3200LE70024 XS1600LE70024 XS800LE70024
Sustained Sequential 128KB Read
Transfer Rate (MB/s)
b.
Sustained Sequential 128KB Write
Transfer Rate (MB/s)
b.
Sustained Random 4KB Read
Trans fer Ra te (KI OPS)
c.
Sustained Random 4KB Write
Trans fer Ra te (KI OPS)
c.
2000 2200 2200 2150
1550 1550 1550 1000
230 230 230 210
110 120 120 100
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 19
www.seagate.com
Tab le 1 4 - Perfo rma nce (continued)
Performance of 3331 Read Intensive Models
Standard Model
Seagate Secure Encryption
Seagate Secure FIPS 140-2
Sustained Sequential 128KB Read
Transfer Rate (MB/s)
Sustained Sequential 128KB Write
Transfer Rate (MB/s)
Sustained Random 4KB Read
Trans fer Ra te (KI OPS)
Sustained Random 4KB Write
Trans fer Ra te (KI OPS)
Performance of 3131 Very Read Intensive Models
Standard Model
Seagate Secure Encryption
Seagate Secure FIPS 140-2
b.
b.
c.
c.
XS15360TE70004 XS7680TE70004 XS3840TE70004
XS15360TE70014 XS7680TE70014 XS3840TE70014
XS15360TE70024
a
XS7680SE70004 XS3840SE70004 XS1920SE70004 XS960SE70004
XS7680SE70014 XS3840SE70014 XS1920SE70014 XS960SE70014
XS7680SE70024 XS3840SE70024 XS1920SE70024 XS960SE70024
2000 2200 2200 2150
1550 1550 1550 1000
230 230 230 210
70 80 80 65
Sustained Sequential 128KB Read
Transfer Rate (MB/s)
Sustained Sequential 128KB Write
Transfer Rate (MB/s)
Sustained Random 4KB Read
Trans fer Ra te (KI OPS)
Sustained Random 4KB Write
Trans fer Ra te (KI OPS)
a. Power limit unconstrainted using both SAS ports.
b. Testing performed at Queue Depth = 32 after Sequential Preconditioning.
c. Testing performed at Queue Depth = 64 after Random Preconditioning.
b.
b.
c.
c.
2100 2000 2100
1000 1550 1550
145 230 220
13 45 50
Due to the nature of Flash memory technologies there are many factors that can result in values different from those
stated in this specification. Some discrepancies can be caused by bandwidth limitations in the host adapter, operating
system, or driver limitations. This manual does not try to cover all possible causes of performance discrepancies.
When evaluating performance of SSD devices, it is recommended to measure performance of the device in a way that
resembles the targeted application using real world data and workloads. Test time should also be large enough to
make sure sustainable metrics and measures are obtained.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 20
www.seagate.com
5.3 Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than four seconds after DC power is applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT
command with the START bit equal to 0, the drive becomes ready for normal operations within 10 seconds (excluding
the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE
SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a
START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive.
After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal
operations within 5 seconds.
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a
NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.
The START STOP UNIT command may be used to command the drive to stop. Stop time is three seconds (maximum)
from removal of DC power. SCSI stop time is three seconds.
The drive support pin 3 POWER DISABLE as defined by the SAS4 specification.
5.3.1 Caching write data
All write data is stored in non-volatile memory before acknowledging the SAS write operation. Non-volatile memory is
both NAND and DRAM that is written to NAND during any power interruption.
The drive never sends a deferred write error status.
The Write Cache Enable (WCE) bit in mode page 08h may be set to 0 or 1 but does not change the operation of the
drive.
The SYNCHRONIZE_CACHE command does not alter the state or location of written data. The response from the drive
for this command indicates that all prior write commands have been completed and acknowledged.
Section Section 12.3.2 MODE SENSE data, on page 78 shows the mode default settings for the drive.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 21
www.seagate.com
5.3.2 Prefetch operation
If the Prefetch feature is enabled, data in contiguous logical blocks on the medium immediately beyond what was
requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the
host on subsequent Read commands that request those logical blocks (this is true even if cache operation is disabled).
Though the prefetch operation uses the buffer as a cache, finding the requested data in the buffer is a prefetch hit, not
a cache operation hit.
To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables
prefetch.
The drive does not use the Max Prefetch field (bytes 8 and 9) or the Prefetch Ceiling field (bytes 10 and 11).
When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous blocks
from the medium when it senses that a prefetch hit will likely occur. The drive disables prefetch when it decides that a
prefetch hit is not likely to occur.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 22
www.seagate.com
6. Reliability specifications
These reliability specifications assume correct host and drive operational interface, including all interface timings,
power supply voltages, environmental requirements, and drive mounting constraints.
6.1 Read error rates
Table 15 - Read Error Rates
Error Rates Notes
Unrecovered Data
Miscorrected Data
Interface error rate
Mean Time Between Failure
(MTBF)
Annualized Failure Rate (AFR) 0.35%
Preventive maintenance None required
Typical Data Retention with Power
removed (at 40C up to 90% of
write endurance)
Endurance Rating Method 2: TBW (per JEDEC JESD218)
Less than 1 LBA in 1017 bits transferred
Less than 1 LBA in 10
Less than 1 error in 10
21
12
2.5M hours
3 months
bits transferred
bits transferred
As NAND Flash devices age with use, the capability
of the media to retain a programmed value begins
to deteriorate. This deterioration is affected by the
number of times a particular memory cell is
programmed and subsequently erased. When a
device is new, it has a powered off data retention
capability of up to several years. With use the
retention capability of the device is reduced.
Temperature also has an effect on how long a Flash
component can retain its programmed value with
power removed. At high temperature the retention
capabilities of the device are reduced. Data
retention is not an issue with power applied to the
SSD. The SSD drive contains firmware and hardware
features that can monitor and refresh memory cells
when power is applied.
Endurance rating is the expected amount of host
data that can be written by product when
subjected to a specified workload at a specified
operating and storage temperature over the
specified product life. For the specific workload to
achieve this level of endurance, please reference
JEDEC Specification JESD218. TBW is defined as
1x1012 Bytes.
Limited Warranty with Media Usage provides
coverage for the warranty period or until the SSD
Percentage Used Endurance Indicator, as defined in
Section 3.2.6, reaches 100 whichever comes first.
NOTE Error rate specified with automatic retries and data correction with ECC
enabled and all flaws reallocated.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 23
www.seagate.com
6.2 Endurance
Table 16 - Lifetime write endurance by model
Endurance
Class
ME 3200 XS3200ME70004 XS3200ME70014 XS3200ME70024 58
ME 1600 XS1600ME70004 XS1600ME70014 XS1600ME70024 29
ME 800 XS800ME70004 XS800ME70014 14
ME 400 XS400ME70004 XS400ME70014 7.3
LE 6400 XS6400LE70004 XS6400LE70014 35
LE 3200 XS3200LE70004 XS3200LE70014 XS3200LE70024 17
LE 1600 XS1600LE70004 XS1600LE70014 XS1600LE70024 8.7
LE 800 XS800LE70004 XS800LE70014 4.3
SE 7680 XS7680SE70004 XS7680SE70014 XS7680SE70024 14
SE 3840 XS3840SE70004 XS3840SE70014 XS3840SE70024 7.0
SE 1920 XS1920SE70004 XS1920SE70014 XS1920SE70024 3.5
SE 960 XS960SE70004 XS960SE70014 XS960SE70024 1.7
TE 15360 XS15360TE70004 XS15360TE70014 XS15360TE70024 19
TE 7680 XS7680TE70004 XS7680TE70014 7.0
TE 3840 XS3840TE70004 XS3840TE70014 3.0
Capacity
in GB
Standard
Seagate Secure
SED
FIPS 140-2
Lifetime PB
JEDEC
For more information on FIPS 140-2 Level 2 certification see Section 8. About FIPS, on page 57.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 24
www.seagate.com
6.3 Error rates
The error rates stated in this manual assume the following:
The drive is operated in accordance with this manual using DC power as defined in Section 7.2 Power
consumption, on page 33.
Errors caused by host system failures are excluded from error rate computations.
Assume random data.
Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write retries and
full retry time.
6.3.1 Unrecoverable Errors
An unrecoverable data error is a failure of the drive to recover data from the media. These errors occur due to read or
write problems. Unrecoverable data errors are only detected during read operations, but not caused by the read. If an
unrecoverable data error is detected, a MEDIUM ERROR (03h) in the Sense Key is reported. Multiple unrecoverable
data errors resulting from the same cause are treated as one error.
6.3.2 Interface errors
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port
connected to the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or
CRC error.
6.4 Endurance management
Customer satisfaction with Solid State Drives can be directly related to the internal algorithms which an SSD uses to
manage the limited number of Program-Erase (PE) cycles that NAND Flash can withstand. These algorithms consist of
Wear Leveling, Garbage Collection, Write Amplification, Unmap, Data Retention, Lifetime Endurance Management.
6.4.1 Wear leveling
The drive uses Wear Leveling to make sure that all Flash cells are written to or exercised as evenly as possible to avoid
hot spots where some cells are used up faster than other locations. The drive automatically manages Wear Leveling
without user interaction. The Seagate algorithm operates only when needed to ensure reliable product operation.
6.4.2 Garbage collection
The drive uses Garbage Collection to consolidate valid user data into a common cell range freeing up unused or
obsolete locations to be erased and used for future storage needs. The drive automatically manages Garbage
Collection without user interaction. The Seagate algorithm operates only when needed to ensure reliable product
operation.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 25
www.seagate.com
6.4.3 Write amplification
While Write Amplification is not an algorithm, it is a major characteristic of SSDs. Write Amplification must be
accounted for by all the algorithms that the SSD implements. The Write Amplification Factor of an SSD is the ratio of
Host/User data requested to be written to the actual amount of data written by the SSD internal to account for the
user data and the housekeeping activities such as Wear Leveling and Garbage Collection. The Write Amplification
Factor of an SSD can also be directly affected by the characteristics of the host data being sent to the SSD to write. The
best Write Amplification Factor is achieved for data that is written in sequential LBAs that are aligned on 4KB
boundaries. The worst case Write Amplification Factor occurs for randomly written LBA's of transfer sizes that are less
than 4KB and that originate on LBA's that are not on 4KB boundaries.
6.4.4 UNMAP
Use of the UNMAP command reduces the Write Amplification Factor of the drive during housekeeping tasks such as
Wear Leveling and Garbage Collection. This happens because the drive does not need to retain data which has been
classified by the host as obsolete.
6.4.5 Data retention
Data Retention is another major characteristic of SSDs that must be accounted for by all the algorithms that the SSD
implements. While powered up, the Data Retention of SSD cells are monitored and rewritten if the cell levels decay to
an unexpected level. Data Retention when the drive is powered off is affected by Program and Erase (PE) cycles and
the temperature of the drive when stored.
6.4.6 Write stream tagging
The Write Stream command is an optional SAS bus command for the host to pass a contextual data tag to SSD. The
SSD stores data context together to minimize write amplification when data is unmapped or over written. The Nytro
3000 supports creating 32 streams but optimal benefit is achieved when 8 or less streams are concurrently active.
6.4.7 SSD percentage used endurance indicator
An application can interrogate the drive through the host to determine an estimate of the percentage of device life
that has been used. To accomplish this, issue a LOG SENSE command to log page 0x11. This allows applications to read
the contents of the Percentage Used Endurance Indicator parameter code. The Percentage Used Endurance Indicator
is defined in the T10 document SBC-4 available from the T10 committee.
6.5 Reliability and service
Integrators can enhance the reliability of Seagate Nytro 3000 SAS SSD drives by ensuring that the drive receives
adequate cooling. Section 12.4.2 Physical characteristics, on page 84 provides temperature measurements and other
information that may be used to enhance the service life of the drive. Section 11.2 Cooling, on page 66 provides
recommended air-flow information.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 26
www.seagate.com
6.5.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)
The production drive shall achieve an AFR of 0.35% (MTBF of 2,500,000 hours) when operated in an environment that
ensures the case temperatures do not exceed the values specified in Section 7.3 Environmental limits, on page 51.
Operation at case temperatures outside the specifications in Section 7.3 Environmental limits, on page 51 may increase
the product AFR (decrease the MTBF). The AFR (MTBF) is a population statistic not relevant to individual units.
The AFR (MTBF) specification is based on the following assumptions for Enterprise Storage System environments:
8760 power-on hours per year.
250 average on/off cycles per year.
Operations at nominal voltages.
Systems will provide adequate cooling to ensure the case temperatures specified in Section 11.2 Cooling, on page 66
are not exceeded. Temperatures outside the specifications in Section 11.2 Cooling, on page 66 will increase the
product AFR and decrease the MTBF.
6.5.2 Preventive maintenance
No routine scheduled preventive maintenance is required.
6.5.3 Hot plugging the drive
When a drive is powered on by switching the power or hot plugged, the drive runs a self test before attempting to
communicate on its' interfaces. When the self test completes successfully, the drive initiates a Link Reset starting with
the Out Of Band sequence (OOB). An attached device should respond to the link reset. If the link reset attempt fails, or
any time the drive looses sync, the drive initiated link reset. The drive will initiate link reset once per second but
alternates between port A and B. Therefore each port will attempt a link reset once per 2 seconds assuming both ports
are out of sync.
If the self-test fails, the drive does not respond to link reset on the failing port.
NOTE It is the responsibility of the systems integrator to assure that no temperature,
6.5.4 S.M.A.R.T.
S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to
recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a failure to
allow administrators to back up the data before an actual failure occurs.
NOTE The drive's firmware monitors specific attributes for degradation over time but
Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating
performance of the drive and the thresholds are optimized to minimize "false" and "failed" predictions.
energy, voltage hazard, or ESD potential hazard is presented during the hot
connect/disconnect operation. Discharge the static electricity from the drive
carrier prior to inserting it into the system.
can't predict instantaneous drive failures.
Seagate Nytro 3731, 3531, 3331, 3131 SAS SSD Product Manual, Rev. C 27
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