Graham Sutherland / PolynomialMay 26, 2024

SD cards are the literal worst.

they've expanded to be the size of small hard drives, and devices like the rpi keep using them as boot media, but they:

- use garbage tier low endurance flash cells internally
- have little to no overprovisioning for wear
- perform only the most basic wear levelling
- have no protocol level integrity checking
- have few internal error correction features, if any
- decay comparatively quickly without patrol scrubs
- do not perform patrol scrubs
- cannot do PLP

Show threadMx Autumn May 26, 2024
@gsuberland what I’m hearing from this is that I should really, really not be using the SD card in my camera as long term storage   guess who’s backing it up as soon as they get home today?
Show threadGraham Sutherland / Polynomial
@carbontwelve oh yeah absolutely. you can expect to see bit-rot on SD cards for anything that was written longer than a year or two ago.
May 26, 2024 at 1:26pmWeb
Show threadMx Autumn May 26, 2024
@gsuberland oh dear haha. Yeah this is going on five years. Didn’t have a computer to copy it over to until this year and so it’s just sat on the shelf, forgotten!
Show threadGraham Sutherland / PolynomialMay 26, 2024

@carbontwelve oof. fingers crossed for you.

our wedding photographer gave us our photos on a USB stick. every single photo on it is now unreadable. (naturally I made backups immediately once we got them!)