3 ms·
IIRC, SLC NAND has ~100,000 write cycles and MLC ~10,000 (enterprise-level SSDs almost exclusively use the former). I'm not aware of any recent studies specific
by pmh 15y ago
IIRC, SLC NAND has ~100,000 write cycles and MLC ~10,000 (enterprise-level SSDs almost exclusively use the former). I'm not aware of any recent studies specifically on durability, but given that there are no moving parts I'd imagine that SSDs last at least as long as mechanical drives. There's also this bit from the press release: "[The] 700GB drive [is] able to write 28 terabytes of data every day for five years."
- wtallis 15y agoThere's a big tradeoff between reliability and density: 50nm MLC is good for around 10k cycles, but 34nm and 25nm MLC are rated in the 3k-5k range, and it's not clear yet whether 20nm MLC will be able to stay in that range. SLC is much more reliable, but also much less dense than MLC. It's easy to maintain overall device reliability (and performance) by having more spare area, but that negates a lot of the benefit of moving to a smaller process. (And the performance penalty from having fewer flash chips to stripe across for a given drive size also detracts from the smaller process size.)