Snažím sa naformátovať USB kľúč. Po vymazaní súborov mi zostalo menej voľného miesta ako je jeho kapacita. Čo robím zle?


┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda6 51470980 6981948 41874456 15% /
udev 505316 4 505312 1% /dev
tmpfs 205036 828 204208 1% /run
none 5120 0 5120 0% /run/lock
none 512580 532 512048 1% /run/shm
/dev/sdb1 15347936 5595328 9752608 37% /media/KINGSTON
/dev/sda5 53247408 4619956 48627452 9% /media/C604635904634B8D
/dev/sda1 53483588 18610020 34873568 35% /media/EE68535E6853249D
┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─> mkfs/dev/sdb1
bash: mkfs/dev/sdb1: No such file or directory
┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─> mkfs -t vfat/dev/sdb1
Usage: mkfs [options] [-t type fs-options] device [size]

Options:
-t, --type=TYPE file system type, when undefined ext2 is used
fs-options parameters to real file system builder
device path to a device
size number of blocks on the device
-V, --verbose explain what is done
defining -V more than once will cause a dry-run
-V, --version output version information and exit
-V as version must be only option
-h, --help display this help and exit

For more information see mkfs(8).
┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda6 51470980 6982360 41874044 15% /
udev 505316 4 505312 1% /dev
tmpfs 205036 828 204208 1% /run
none 5120 0 5120 0% /run/lock
none 512580 532 512048 1% /run/shm
/dev/sdb1 15347936 5595328 9752608 37% /media/KINGSTON
/dev/sda5 53247408 4619956 48627452 9% /media/C604635904634B8D
/dev/sda1 53483588 18610020 34873568 35% /media/EE68535E6853249D
┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─> ^C
┌─( juraj ) - ( 3.2.0-32-generic ) - ( /media/KINGSTON )
└─>