Even less endurance?
The problem with another die shrink on the underlying NAND is that this further reduces "writes per cell" - with every generation an order of magnitude is lost.
While this is great for the mobile industry, much larger capacities in less space - its fine for iPods and phones where we tend to "write once" and read many - how many times do you delete an mp3 or a photo and then overwrite the blocks ? never?
In an disk drive however we are forever re-writing blocks. If endurance drops to <10,000 write per cell for these 32nm NAND, then you have to over-provision more and more - thus defeating the purpose of adding the extra capacity. Todays 45nm SLC NAND is the only real option for an enterprise drive - I wouldn't even like to put an MLC device in my desktop or laptop until we have hybrid SLC and MLC - so the disk itself can move stagnant data onto the MLC portion.
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David McLeman
Tim Worstall
Chris Mellor
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