Standards arrive: JEDEC JESD218 and JESD219
JEDEC is the leading developer of standards for the solid-state industry. With over 3,000 participants from nearly 300 companies, various standards work is brought together under 50 JEDEC committees to meet the needs of every segment of the industry, manufacturers and consumers alike.
JEDEC JESD218 and JESD219 address the standards needed to distinguish between SSD endurance in both enterprise and client application classes. Enterprise and Client are the two fundamental classes which serve as the building blocks for present and future solid state standard development. Both standards documents are available to download here
. These standards define specific requirements for each application class, describe a test methodology, and create an SSD Endurance Rating that provides a standard comparison for SSD endurance based on application class.
Enterprise and Client Classes Defined
Since workloads vary with storage depending on their application environment, Enterprise and Client class categories have different needs that must be met according to the standard. The Client class is derived from a single-drive environment, with an emphasis on notebook applications. The Enterprise class is based on a multi-drive environment, with an emphasis on random access and mixed workloads.
In addition to different daily usage and temperature environments, specific power-off long-term data retention and UBER (unrecoverable bit error rate) requirements must be met for each class.
The Enterprise class requires operation typical of a server in use 24 hours per day. The Client class reflects typical notebook active use of 8 hours per day.