Previously I have issued the command "sudo fstrim -v /" and it went away for a while eventually coming back announcing how many blocks it had freed.
Since doing some "apt-get update; apt-get upgrade" recently it returns with an error "fstrim: /: FITRIM ioctl failed: Operation not supported".
What happened?
Now, I'm not even sure fstrim can do anything for SD Cards as the have no TRIM command. I had hoped that maybe fstrim uses their ERASE command instead.
Is fstrim supposed to work for SD Cards? Has it changed recently? Or has my system changed somehow?