Quote:
Originally Posted by ottischwenk
But it is so - there is technical evidence for it.
The built-in SD cards can withstand at best 300 write processes per cell - then they are defective.
Only someone who doesn't use the device very much will stay fine longer.
With a large library and a lot of browsing through other books, it can't last long.
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Really? Can you point out a source for that claim that the built-in µSD cards are limited to at best 300 write processes per cell? Last time I looked, SanDisk, Samsung, Toshiba, Pansonic and Kingston all claimed a minimum of 10,000 write cycles for MLC cards and 100,000 for SLC cards. Even a TLC (three level cell) claims 3,000 minimum write cycles. Using QLC SD cards, the write cycles will drop to 1,000 still well over your claimed 300 cycles.
Given the builtin wear levelling in most controllers these days, even 1,000 writes is going to take a while to expire the maximum writes.
As for a large library and browsing through books wearing out the µSD card? Last time I looked, reading did not have an effect on the lifespan of the cells. Given that I write to my ereaders on the average once per day and that the data transferred is well below the card size, I'm not all that worried.
Basic logic says that if I write 10MB per day and the internal storage is 32GB, I would need ~3200 writes to hit 1 complete write cycle. So using a QLC card, multiple 3200 by 1000 or 3,200,000 days or approximately 8,700 years as the average time to exceed the card life cycle.
Oddly eMMC memory used in higher end ereaders shows a 3,000 program/erase life cycle for MLC devices.