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== ext4 on usb flash ==ext4 # sudo mkfs.ext4 /dev/sdc1 mke2fs 1.42.13 (17-May-2015) /dev/sdc1 contains a vfat file system Proceed anyway? (y,n) y /dev/sdc1 is mounted; will not make a filesystem here! # umount /dev/sdc1 # sudo mkfs.ext4 /dev/sdc1 mke2fs 1.42.13 (17-May-2015) /dev/sdc1 contains a vfat file system Proceed anyway? (y,n) y Creating filesystem with 31358720 4k blocks and 7839744 inodes