SSD-drives Micron M600 16-nm flash memory and cache write operations

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POSTER: computer news   ||   SSD-DRIVES MICRON M600 16-NM FLASH MEMORY AND CACHE WRITE OPERATIONS	DATE:2014-09-17
Micron company presents its new line of SSDs - Micron M600.  The drives are designed for a very wide range of applications - from desktops to notebooks and ultrabooks. (Source: Micron)   Unfortunately, the manufacturer does not provide data on the controller used, however, to all appearances, it is Marvell 88SS9189.  The company  will be 16-nm synchronous MLC NAND built on crystals density 128 Gb own production Micron.  This combination of the controller and memory reminds us of the already discharged Crucial MX100 , but the speed of the new product are markedly different: MX100 128 GB M600 128 GB MX100 256 GB M600 256 GB MX100 512 GB M600 512 GB M600 1TB Form Factor 2,5 "SATA 2,5 "SATA mSATA M.2 SATA 2,5 "SATA 2,5 "SATA mSATA M.2 SATA 2,5 "SATA 2,5 "SATA mSATA M.2 SATA 2,5 "SATA Sequential read speed 550 MB / s 560 MB / s 550 MB / s 560 MB / s 550 MB / s 560 MB / s 560 MB / s Sequential write speed 150 MB / s 400 MB / s 330 MB / s 510 MB / s 500 MB / s 510 MB / s 510 MB / s Added random blocks (4KB) 40,000 IOPS 88 000 IOPS 70,000 IOPS 88 000 IOPS 85,000 IOPS 88 000 IOPS 88 000 IOPS Micron, describes a new algorithm for data records that  found use in the firmware M600. (Source: Micron)   However, this new algorithm is only for Crucial-Micron, but not for the market of SSDs in general: we are talking about the so-called fast-track recording mode, also known as "pseudo-SLC" (OCZ, Toshiba), aka TurboWrite (Samsung), nCache (SanDisk). Its essence lies in the fact that the incoming data is written to the flash memory, one bit per cell, as if it were SLC NAND.  This trick allows at times to increase the data writing speed: by comparing Crucial MX100 and M600 128GB we see almost three-fold increase - from 130 to 400 MB / s (in a more capacious models difference leveled due to the fact that the constraint becomes SATA3 technology ).  All of the above manufacturers use a similar technique to increase the speed performance of their drives, using it in different variations.  Micron chose the most familiar: the data on the drive is written with increased speed until until exhausted half the available space in the array of flash memory, then the disk abruptly switches to the normal mode, simultaneously starting to clean up those cells where information was recorded in accelerated mode. It would seem that such a regime should increase the load on the flash memory, and an additional factor, which reduces the life cycles of rewriting, but SLC-mode itself is a gentle (in particular, requires a lower voltage for writing).  Also, apparently, Micron fails to improve the technical process of production.   Related Products :

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