Re: FFSv2 log option with SD card

[MJ <mafsys1234%gmail.com@localhost>]

On 22/02/2020 4:28 am, Sad Clouds wrote:
> Hi, is it advisable to NOT enable log option for FFSv2 that resides on
> SD card due to flash memory wearing out in those regions, or does it
> make no practical difference because of built-in wear levelling?


How long's a piece of string?

Wear levelling just evens out the wear... surprise. It doesn't account for the overall wear.

I read a document many years ago, where a 4kb cluster size for a 1 GB SD and 4kb writes per N seconds (where N was below 10, can't recall), and the estimated life of the SD card was 80 years. So, go ahead and enable logging. At worst you probably shorten its life by a few years.


Of course, this all depends on the read/writing you're doing to the SD card. YMMV.