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JEDEC standards and publications contain material that has been prepared, reviewed, and approved through the JEDEC Board of Directors level and subsequently reviewed and approved by the JEDEC legal counsel.
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JEDEC
STANDARD
Solid-State Drive (SSD) Endurance
Workloads
JESD219A
(Revision of JESD219, September 2010)
JULY 2012
JEDEC SOLID STATE TECHNOLOGY ASSOCIATION
NOTICE
JEDEC standards and publications contain material that has been prepared, reviewed, and
approved through the JEDEC Board of Directors level and subsequently reviewed and approved
by the JEDEC legal counsel.
JEDEC standards and publications are designed to serve the public interest through eliminating
misunderstandings between manufacturers and purchasers, facilitating interchangeability and
improvement of products, and assisting the purchaser in selecting and obtaining with minimum
delay the proper product for use by those other than JEDEC members, whether the standard is to
be used either domestically or internationally.
JEDEC standards and publications are adopted without regard to whether or not their adoption
may involve patents or articles, materials, or processes. By such action JEDEC does not assume
any liability to any patent owner, nor does it assume any obligation whatever to parties adopting
the JEDEC standards or publications.
The information included in JEDEC standards and publications represents a sound approach to
product specification and application, principally from the solid state device manufacturer
viewpoint. Within the JEDEC organization there are procedures whereby a JEDEC standard or
publication may be further processed and ultimately become an ANSI standard.
No claims to be in conformance with this standard may be made unless all requirements stated in
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Inquiries, comments, and suggestions relative to the content of this JEDEC standard or
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Standards and Documents for alternative contact information.
Published by
©JEDEC Solid State Technology Association 2012
3103 North 10th Street
Suite 240 South
Arlington, VA 22201-2107
This document may be downloaded free of charge; however JEDEC retains the
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This document is copyrighted by JEDEC and may not be
reproduced without permission.
For information, contact:
JEDEC Solid State Technology Association
3103 North 10th Street
Suite 240 South
Arlington, VA 22201-2107
or refer to www.jedec.org under Standards-Documents/Copyright Information.
JEDEC Standard No. 219A
Page 1
SOLID STATE DRIVE (SSD) ENDURANCE WORKLOADS
(From JEDEC Board Ballot, JCB-12-16, formulated under the cognizance of the JC-64.8 Subcommittee
on Solid-State Drives.)
1 Scope
This standard defines workloads for the endurance rating and endurance verification of SSD application
classes. These workloads shall be used in conjunction with the Solid State Drive (SSD) Requirements and
Endurance Test Method standard, JESD218.
2 Reference documents
JESD218, Solid State Drive (SSD) Requirements and Endurance Test Method
3 Terms and definitions
cluster: The minimum # of contiguous LBAs allocated by the host operating system.
Cold LBA Range: An LBA Range not referenced by a write or trim in a trace.
command trace: A trace of I/O commands.
compression: The process of scaling LBAs associated with commands in the Master Trace to produce a
Test Trace with a smaller LBA Range.
entropy: The non-compressibility of a data pattern when in file format such that 100% entropy has no
reduction in file size and 50% entropy has approximately a 50% reduction in file size when converting to
a zip file.
expansion: The process of scaling LBAs associated with commands in the Master Trace to produce a
Test Trace with a larger LBA Range.
footprint: A set of LBAs.
Free LBA Space: A set of LBAs within LBA Address Space, which are not currently allocated for data
storage by the host OS.
LBA Address Space: The full set of user addressable LBAs on the device.
LBA Range: The set of contiguous LBA addresses bounded by the lowest and highest LBA of an
addressed structure.
Maximum LBA: A value specifying the LBA number corresponding to the last LBA in the LBA
Address Space.
Master Trace: A command trace typical of a period of continuous drive operation in a typical client
environment, from which Test Traces are derived.
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