alt Hacker NewsMan, I do wonder what the realistic lifespan of that single NAND chip will be after it gets hammered by constant swapping of running tasks way beyond the capabilities of a 8GB RAM machine.
I have a PC with a 10+ year old 256GB SATA Samsung SSD that's still in top shape, but that's different because that drive has those 256GB split over several NAND chips inside, so wear is spread out and shuffled around by the controller to extend lifespan. But when your entire wearable storage is a single soldered chip, I'm not very optimistic about long term reliability.
Replies
>but that's different because that drive has those 256GB split over several NAND chips inside, so wear is spread out and shuffled around by the controller to extend lifespan. But when your entire wearable storage is a single soldered chip, I'm not very optimistic about long term reliability.
I thought wear leveling worked at the page/block level, not the chip level? On an SSD, if there was a failure of an entire chip, you're still screwed.
from what i seen in "low end" ssds like the "120gb sata sandisk ones" under windows in heavy near constant pagging loads is that they exceed by quite a lot their manufacturer lifetime TBW before actually actually started producing actual filesystem errors.
I can see this could be a weaker spot in the durability of this device, but certainly it still could take a few years of abuse before anything breaks.
an outdated study (2015) but inline with the "low end ssds" i mentioned.
https://techreport.com/review/the-ssd-endurance-experiment-t...
Most flash has average wear out after 300k cycles. Let's say 64GB is used for swap. That's 19200 TB or 19.2 PETABYTES of Swap usage. Let's say you swap 12GB a day, you will burn out that 64GB of Flash Storage in 4.38 years and my guess is that amount of swap usage is extremely high that user would probably replace laptop sooner out of performance frustration.
There was quite a bit of discussion about that when the M1 first came out, but none of it really seemed to have happened six years later. The target audience isn't in danger of wearing it out and the ones that will push the limits will grow tired of it and sell it in a year or two or move on to the Neo 2, which might have 12gb of ram due to the expected chip.
I still think it's a great machine, but I think all these worries about NAND dying really haven't come to fruition, and probably won't. I have about a hundred plus of various SSD Macs in service and not one has failed in any circumstance aside from a couple of battery issues (never charged and sat in the box for 2 years, and never off the charger).