Le 10/03/2019 à 17:01, Pierre Frenkiel a écrit :
hi, I'm trying to fromat a nes USB flash drive and I get this: ==> mount | grep sdh ==> mkfs.vfat /dev/sdh1 mkfs.fat 4.1 (2017-01-24) mkfs.vfat: /dev/sdh1 contains a mounted filesystem. ==> mkfs /dev/sdh1 works
You should not format (and more generally write directly to) a block device which contains a mounted filesystem.