[mtools] Making bootable USB flash drive

[Eugene Kotlyarov]

Hello

I'm trying to make bootable USB flash drive with mtools, but with no
success.

I create it using bootsector from bootable floppy with a command
$ mformat -B ~/work/floppy/floppy.img -t 16 -h 255 -s 63 -H 32 w:

It builds filesystem well but when booting it just echoes
FreeDOS FAT
and hangs up.
I've tried MSDOS disk too with the same results.

Has anyone any ideas on how to make it work?

(I've attached minfo command output for floppy and flash images)

device information:
===================
filename="/home/ekot/work/floppy/flash.img"
sectors per track: 63
heads: 255
cylinders: 16

mformat command line: mformat -t 16 -h 255 -s 63 -H 32 w:

bootsector information
======================
banner:"MSDOS5.0"
sector size: 512 bytes
cluster size: 4 sectors
reserved (boot) sectors: 6
fats: 2
max available root directory slots: 512
small size: 0 sectors
media descriptor byte: 0xf8
sectors per fat: 249
sectors per track: 63
heads: 255
hidden sectors: 32
big size: 254944 sectors
physical drive id: 0x0
reserved=0x0
dos4=0x29
serial number: 14EBBA2F
disk label="NO NAME    "
disk type="FAT16   "

device information:
===================
filename="/home/ekot/work/floppy/b44.imz.tmp"
sectors per track: 18
heads: 2
cylinders: 80

mformat command line: mformat -t 80 -h 2 -s 18 y:

bootsector information
======================
banner:"FreeDOS "
sector size: 512 bytes
cluster size: 1 sectors
reserved (boot) sectors: 1
fats: 2
max available root directory slots: 224
small size: 2880 sectors
media descriptor byte: 0xf0
sectors per fat: 9
sectors per track: 18
heads: 2
hidden sectors: 0
big size: 0 sectors
physical drive id: 0x0
reserved=0x0
dos4=0x29
serial number: D4DAB2BA
disk label="BOOTDISK   "
disk type="FAT12   "