make bootable win usb with udf iso

ubuntu make bootable win usb with udf iso

The key and easily be forgot step is to write a proper boot sector to the usb stick, which can be don from Linux with ms-sys or lilo -M.

ms-sys kili -M

sudo apt install gparted

With my 16GB of usb,I use gparted to reserved 10gb space for ntfs to store data bigger than 4G and get 4 gb at beggining of disk for our UDF ISO image.

cfdisk /dev/sdb or fdisk /dev/sdb

mkfs.ntfs -f /dev/sdb1

mount -o loop win7.iso/UEFI+legacy_PE.iso /mnt/iso mount /dev/sdb1 /mnt/usb

cp -r /mnt/iso/* /mnt/usb

Callsync to make sure all files are written

Literally we could backup what we’ve done the that block divce (our usb) to a raw image file for further instalation and get rid of the inconvience of udf formated iso file.

dd count=$(((stat -c '%s' win7.iso + 810241024) / 512)) if=/dev/sdb1 of=win7.img status=progress

vital important poart of making boot sector/boot loader

sudo ms-sys -7 /dev/sdX

other boot loader method

Example: syslinux

syslinux -i /dev/sdb1 (The first partition, pbr) dd if=./syslinux/bios/mbr.bin of=/dev/sdb (write firmware to first 512 sector as mbr)

Mount the USB drive and create the directory boot/syslinux Copy all *.c32 files from /usr/lib/syslinux/bios to the boot/syslinux directory on the USB Create a syslinux.cfg text file on boot/syslinux, with the text

LABEL win10
MENU LABEL Boot Windows 10 install
COM32 /boot/syslinux/chain.c32
APPEND label=win7fs ntldr=/bootmgr

make dd visualization with progress status

dd in GNU Coreutils 8.24+ (Ubuntu 16.04 and newer) got a new status option to display the progress.

We cloud just simply append both status=progess and oflag=dsync parameters to dd.

when it comes to pv, which is popular. It’s actually not help me doing this at all. properble the command below would give you a beautiful progress window friendly.

pv /home/user/bigfile.iso | md5sum

related utils

• mkusb-nox
• Unetbootion
• gparted
• parted

reference:

• https://serverfault.com/questions/6714/how-to-make-windows-7-usb-flash-install-media-from-linux
• https://thornelabs.net/2013/06/10/create-a-bootable-windows-7-usb-drive-in-linux.html
• http://www.rmprepusb.com/tutorials/usbpreplinux