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
@kelpana @gsuberland USB-attached SATA or NVMe SSDs.
USB flash drives are the exact same (or often worse). Don't use them either.
@kelpana @gsuberland SD cards can be okay, if you use them read-only-only and buy from reputable vendors (e.g. Samsung).
If you really need R/W storage -- SPI NOR flash is a good option (together with proper wear leveling, etc.).
eMMC storage ICs are also available, often slightly more reliable and available from reputable vendors with a proper datasheet. They might work in some situations.
Otherwise, things get tricky...
No, NVMe won't work.
Graham Sutherland / Polynomial
Alanna 🏳️🌈🏳️⚧️
Manawyrm | Sarah