The C400 Micron, which should be called M4 at Crucial is in the starting blocks. As expected, it uses MLC memory in 25 nm and several versions exist. Micron separates the high-capacity models (128, 256 and 512 GB) 64 GB model, named C400v (as value). The classic C400 are announced to 415 MB / s sequential read and 260 MB / s sequential write, except the 128 GB version which is limited to 175 Mb / s.
IOPS, Micron said 40,000 IOPS random read and 50 000 IOPS random write, except the 128 GB which is given to 35,000 IOPS. The lifetime is given for the three models to 72 TB of data, half written sequentially and in random half. Micron says 5% of files of 4 KB, 8 KB 5%, 10% of 16 kb, 10 kb of 32%, 35% to 64% and 35 kb to 128 kb.
The MTBF is 1.2 million hours. Three variants exist for each capacity: 2.5-inch SATA classic and 9.5 mm thick, 2.5 inches 7 mm thick and 1.8 inch MicroSat and 5 mm thick. Performances should not move. C400v the 64 GB also comes in three sizes and performance is lower: 415 MB / s sequential read, 95 MB / s sequential write, 40,000 IOPS random read and 20,000 IOPS random write.
The MTBF is the same (1.2 million hours), but endurance increased from 72 to 36 TB The price and release date are not known, but the current C300 are listed as "EOL" (End Of Life), indicating that the C400 should arrive soon. 
IOPS, Micron said 40,000 IOPS random read and 50 000 IOPS random write, except the 128 GB which is given to 35,000 IOPS. The lifetime is given for the three models to 72 TB of data, half written sequentially and in random half. Micron says 5% of files of 4 KB, 8 KB 5%, 10% of 16 kb, 10 kb of 32%, 35% to 64% and 35 kb to 128 kb.
The MTBF is 1.2 million hours. Three variants exist for each capacity: 2.5-inch SATA classic and 9.5 mm thick, 2.5 inches 7 mm thick and 1.8 inch MicroSat and 5 mm thick. Performances should not move. C400v the 64 GB also comes in three sizes and performance is lower: 415 MB / s sequential read, 95 MB / s sequential write, 40,000 IOPS random read and 20,000 IOPS random write.
The MTBF is the same (1.2 million hours), but endurance increased from 72 to 36 TB The price and release date are not known, but the current C300 are listed as "EOL" (End Of Life), indicating that the C400 should arrive soon.
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