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Apple are using a single 256gb nand chip in the base model of the M2. So parallelization of read/write isn't possible. You have to wait on that one chip. Which
by tehbeard 4y ago
Apple are using a single 256gb nand chip in the base model of the M2.
So parallelization of read/write isn't possible. You have to wait on that one chip. Which kills random I/O speeds, which are the more real world model of usage than blasting a 500mb file all at once.
- wtallis 4y agoA single NAND package as used in SSDs almost always contains multiple NAND dies (up to 16), commonly exposed through two or four independent channels per package (M.2 drives with 8-channel controllers frequently have just 2 NAND packages). A 256GByte NAND package must contain multiple NAND dies, because nobody makes 2Tbit NAND dies yet. Each NAND die is partitioned into two or four planes that can operate more or less independently, save for sharing the same uplink to the SSD controller. So while it is reasonable to worry about reduced parallelism in small SSDs when moving to newer, larger NAND dies, it is wildly incorrect to say that a 256GB drive has no capability for parallelization.
- eternityforest 4y agoChip? As in soldered on nonreplacable chips? Apple sure loves doing weird stuff.