I've been trying to install Arch Linux onto an SD card to use plugged into my macbook. Currently, I've booted into the installation media on a usb key and I'm trying to write the GPT partition table onto the SD card.
gdisk /dev/mmcblk0 to open the SD card in gdisk, but there was a wall of repeat errors printed out. There are three different kinds of lines:
mmcblk0: error -84 transferring data Buffer I/O Error on device mmcblk0, logical block 0 Warning! Read error 5; strange behavior now likely!
They all appear to be write errors of some kind, so I tried to flip the lock switch on the card to the other setting, boot again, and try to partition, but the result was a message as soon as gdisk was run saying outright that the disk could not be written to.
Is there a driver that needs to be installed into the installation media to allow it to write to SD cards?