Устанавливаем USB Flash диск в OpenWrt

[LostInEcho]

не могу отформатировать флешку((

root@OpenWrt:~# mkfs.ext4 /dev/sda
-ash: mkfs.ext4: not found

появилась еще проблемка
root@OpenWrt:~# mount -t ext4 /dev/sda1 /mnt/usb -o rw,sync
mount: mounting /dev/sda1 on /mnt/usb failed: Invalid argument

Вот что имеем:
root@OpenWrt:~# fdisk -l

Disk /dev/mtdblock0: 0 MB, 131072 bytes
255 heads, 63 sectors/track, 0 cylinders, total 256 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock1: 1 MB, 1036288 bytes
255 heads, 63 sectors/track, 0 cylinders, total 2024 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock2: 2 MB, 2960896 bytes
255 heads, 63 sectors/track, 0 cylinders, total 5783 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock3: 1 MB, 1376256 bytes
255 heads, 63 sectors/track, 0 cylinders, total 2688 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock4: 0 MB, 65536 bytes
255 heads, 63 sectors/track, 0 cylinders, total 128 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock5: 3 MB, 3997696 bytes
255 heads, 63 sectors/track, 0 cylinders, total 7808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 4026 MB, 4026531840 bytes
124 heads, 62 sectors/track, 1022 cylinders, total 7864320 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2c4bfd2a

Device Boot Start End Blocks Id System
/dev/sda1 * 133120 7864319 3865600 83 Linux
/dev/sda2 2048 133119 65536 82 Linux swap / Solaris