Dates are decoded from SMI version codes: the letter is the year (J = 2010 … Y = 2025) and the four digits are month and day.
Controller
SM2258XT: SATA 6Gb/s SSD controller, 4 NAND channels, DRAM-less, LDPC ECC.
Function
Silicon Motion mass production tool package. It initializes the drive, loads the controller firmware, scans and records bad blocks, and writes the drive identity (model, serial number, capacity). Packages that include RDT firmware can run a burn-in test before the final firmware is loaded. Running the tool re-initializes the drive; existing user data is lost.
The database lists every part the MPTool can identify. The firmware in this package is built for Intel-Micron IM3D; other entries normally need the matching firmware build.
Part numbers are copied as written in the database. Variant lists the bracketed qualifiers from the entry (voltage, die count, generation). Flash ID shows the first six ID bytes stored for the entry.