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JEDEC Standard No. 219A.01
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3 Terms and definitions (cont’d)
PreCond%full: The % of clusters in LBA Address Space that are assigned to valid data on the device
under test by the preconditioning process.
SSD_Capacity: See JESD218.
Test Trace: A command trace comprising I/O operations to a drive under test that is run during the test
phase of a client workload.
Trim: A command from the host that identifies data that is no longer used by the operating system,
allowing the memory space to be considered Free LBA Space by the drive.
4 Enterprise endurance workload
The enterprise endurance workload consists of random data distributed across an SSD in a manner similar
to some enterprise workload traces that are publicly available for review.
Prior to running the workload, the SSD under test shall have the user-addressable LBA space filled with
valid data (e.g., the drive does not return a data read error because of the content of the LBA prior to
being written during the test routine). Initialization may not be necessary if the formatted SSD satisfies
this requirement.
a) The enterprise endurance workload shall be comprised of random data with the following payload
size distribution:
512 bytes (0.5K) 4%
1024 bytes (1K) 1%
1536 bytes (1.5K) 1%
2048 bytes (2K) 1%
2560 bytes (2.5K) 1%
3072 bytes (3K) 1%
3584 bytes (3.5K) 1%
4096 bytes (4K) 67%
8192 bytes (8K) 10%
16,384 bytes (16K) 7%
32,768 bytes (32K) 3%
65,536 bytes (64K) 3%
b) The data payloads greater than or equal to 4096 bytes data payload sizes shall be arranged such that
the data payloads less than 4096 bytes are pseudo randomized among the data payloads greater than
or equal to 4096 bytes. Data payloads greater than or equal to 4096 bytes are aligned on 4K
boundaries.
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JEDEC