View Full Version : usb-creator-gtk doesn't find my virtual disk

May 15th, 2014, 10:33 PM
I know how to create an USB to install linux. I've done it.
But now I'd like to do some tests with usb-creator. And instead of making useless writings onto my USB stick, I wanted to make an installation on a "virtual disk-partition".
The trouble is that : when I launch usb-creator-gtk, it finds my /dev/sdb2 (REAL usb formated into Fat32) but NOT any virtual disk. And I have no idea why.
If you can help, it'd be very cool :)

(I think that my post doesn't fit well with this part of forum, so, sorry, but I really didn't know where to put it :()

here is what I did :

mkdir /tmp/t7; cd /tmp/t7
dd if=/dev/null of=vu7 bs=1 seek=3800M count=0
losetup /dev/loop7 vu7
sfdisk -uM /dev/loop7 << EOF
> 10,3000,c,*
> ;

fdisk -l /dev/loop7
# Device Boot Start End Blocks Id System
# /dev/loop7p1 * 16065 6168959 3076447+ c W95 FAT32 (LBA)
# /dev/loop7p2 1 16064 8032 83 Linux

mknod /dev/loop7p1 b 7 8
losetup /dev/loop7p1 -o $((512 * 16065)) --sizelimit $(((6168959-16065)*512)) vu7
mkfs.vfat -F 32 /dev/loop7p1
# --> mkfs.fat 3.0.26 (2014-03-07)
# --> Loop device does not match a floppy size, using default hd params

install-mbr /dev/loop7
partprobe /dev/loop7
partprobe /dev/loop7p1

but in the end usb-creator-gtk completly ignores my loop7p1 device