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SD cards are really neat. Theoretically they could have been made with a fixed notch so they would always present as read-only.
by actionfromafar 3y ago
SD cards are really neat. Theoretically they could have been made with a fixed notch so they would always present as read-only.
- 01HNNWZ0MV43FF 3y agoSince SD cards and USB sticks are both just computers you plug in to a network port on your computer, they could definitely make write-once SD card controllers.
- TeMPOraL 3y agoAFAIK notch is just declaration of intent, like with floppies and magnetic tapes - it's politely asking the reading device to not write to the medium, and it's up to the device to respect it (or up to user to not bridge the notch with a piece of tape). Still, actual write-once (or read/write until hardware fuse is triggered, read-only afterwards) SD cards should be possible to make.
- vel0city 3y agoIt depends on the card. Sometimes it is just a suggestion to the firmware, sometimes it physically prevents writes. I've definitely encountered read-only SD cards which I couldn't figure out a way to set it back to RW mode.