Quote from: crypto_curious on Today at 10:27:25 AM

4 reflashes? You may have faulty SD card then.

Highly doubt that; they ship a brand-new industrial microSD. It's possible that @brain brain just used the wrong image in one of the 4 attempts and / or plugged the card too quickly and / or messed up the wiring when playing around with swapping hashboards and controllers, etc. etc. etc...

Quote from: n0nce on June 19, 2022, 12:22:52 AM

Hardware:

Orange Pi 4 (Rockchip RK3399, 6 cores, 64-bit; 4GB DDR4 RAM).
1TB Kingston NV1 NVMe SSD.
16GB SanDisk Industrial microSD card.
Hashboard with 44 ASIC chips and beefy heatsink + industrial fan.

'Industrial' is actually not just a buzzword here; it is pretty legit.

Quote from: n0nce on January 23, 2022, 03:15:34 AM

Many users are also worried about the longevity of microSD cards compared to laminated paper or metal seed backups. I agree that these are safer than an SD card as they're more resistant to water, dust, radiation, heat and cold, as well as even fire (if using metal).
Foundation does use an SD card from SanDisk's 'industrial' lineup. It seems these are much more temperature resistant than other models, so you could bury them outside and stuff like this without worries.

Quote from: https://www.engadget.com/2017-10-05-sandisk-industrial-sd-cards-extreme-temperatures.html

They can work in temperatures ranging from -40°F to 185°F for extended periods of time.

So for my metric friends, this is from -40°C to 85°C. Operating temperatures; so it can be used outside in most places of the world at most times of the year, which is great!