On 8/8/23 09:43, Geoffrey Leach wrote:
Answers to questions below. FWIW, on both systems a different SD
card
performs with no problem. That and the error message from e2fsck lead
me to suspect that my problem is a bad superblock on the card. I've
been unable to find any instructions on how to get e2fsck to mark the
current superblock bad and create a new superblock.
You can't do that. The filesystem puts the superblock in a specific
position. If the SD card has a bad block, then it's probably time to
toss it. But you could try copying /dev/zero to the entire card and see
if it reallocates.