NCACHENegative Caching
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It come with increased reliability and endurance as Sandisk has employed its nCache 2.0 and DataGuard technology on this SSD.
The X400 SSD also achieves increased reliability and endurance by implementing SanDisk's own nCache 2.0 technology and DataGuard technology as well as additional error correction mechanisms.
SanDisk Ultra II SSD, based on X3 NAND Flash technology, comes equipped with nCache 2.0 technology that utilises a two-tiered caching architecture to optimise drive speed and endurance.
Let there be Ncache servers [C.sub.1], [C.sub.2], ..., [C.sub.N] in the whole system and on an average, [[lambda].sub.i] DNS requests that miss the cache arrive at [C.sub.i] (i = 1, 2, ..., N) per second with an arbitrary and independent interarrival time distribution [F.sub.i] ([xi]).
The drive also allows ASUS to deliver greater performance to its users, as pSSD offers 9,000 vRPM of performance and employs nCache, a large non-volatile write cache technology that improves burst random write performance.
SanDisk, however, said their new pSSD P2 and pSSD S2 drives use a new technology called nCache, which instead of DRAM, uses nonvolatile NAND flash memory as a cache to store writes more efficiently before laying them down on the drive.<p>Don Barnetson, senior director of marketing for SanDisk's SSD division, said nCache is superior to DRAM because it won't lose data when a drive is powered down as a traditional cache does, and it won't be forced by operating systems to flush its memory to the drive.<p>Microsoft Corp.'s Windows operating system tends to issue commands to flush cache to storage devices often when the system is busy, as much as 30 times per second.