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Memory that stores 4 bits per cell is commonly referred to as quad-level cell (QLC), following the convention set by TLC. Prior to its invention, the term "QLC" was synonymous with MLC in referring to cells that can have 4 voltage states, i.e. ones that store 2 bits per cell – what is now unambiguously referred to as DLC. [citation needed]
The first, the SSD 510, used an SATA 6 Gigabit per second interface to reach speeds of up to 500 MB/s. [14] The drive, which uses a controller from Marvell Technology Group , [ 15 ] was released using 34 nm NAND Flash and came in capacities of 120 GB and 250 GB.
This improves write performance by allowing data to be written to faster SLC storage before being moved to slower, higher-capacity MLC or TLC storage. [ 83 ] On NVMe SSDs, Host Memory Buffer (HMB) technology allows the SSD to use a portion of the system’s DRAM instead of relying on a built-in DRAM cache, reducing costs while maintaining a ...
Micron (MU) enhances capabilities of 5210 QLC SSDs to help data-center operators improve performance and minimize costs by securely replacing HDDs in servers and storage with QLC NAND SSDs.
Micron (MU) ships 176-layer QLC NAND SSDs in volumes and introduces 176-layer QLC NAND-based 2400 PCIe Gen4 NVMe SSD.
Before the X25-M was released, all of the multi-level cell (MLC) drives were the same piece of hardware, but with a different company logo on it. [citation needed] This is called rebranding, which happens often in the computer hardware market, but Intel opted to develop its own MLC drive.
The Introduction of FCM2 was the industry's largest capacity enterprise SSD as well as the first enterprise SSD to offer exclusively QLC NAND Flash! [ 12 ] [ 13 ] FCM3.0 - U.2 NVMe PCIe gen 3 and gen 4, hybrid SLC-QLC NAND Flash, available in 4 capacities, 4.8TBu / 21.99TBe, 9.6TBu / 28.8 TBe, 19.2TBu / 57.6TBe, and 38.4TBu / 115.2TBe [ 14 ]
However, sequential- and random-write patterns will aggravate the damage because there are no or few frequently-written pages that could be contained in the SLC area, forcing old data to need to be constantly be rewritten to MLC / TLC from the SLC area. This method is sometimes called "SLC cache".
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