Re: [opensuse] making iso from distribution bootable usb stick

On 27/12/15 08:04 AM, Stanislav Baiduzhyi wrote:

On Sun, Dec 27, 2015 at 12:35 PM, jdd wrote:

...

as a complementary word, usb sticks are 8Gb, so a simple dd is not a solution, may be with some argument?? I've read the sources of suse image writer, it just copies the content of the ISO to the device. So I would guess the same can be done backwards? I'm just not sure how ISO will behave if the image file length is bigger than actual contents. So, what I would try: (snip) I am pretty sure that this is not going to work. I used image writer to create a usb stick to install Leap. It contains two partitions, a very small EFI (FAT-16) partition and a hidden 4GB NTFS or HPFS partition containing the files from the ISO image:

loki:~ # fdisk -l /dev/sdf Disk /dev/sdf: 15.2 GiB, 16296967680 bytes, 31830015 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 Disklabel type: dos Disk identifier: 0x20ca2c8b Device Boot Start End Sectors Size Id Type /dev/sdf1 3780 11339 7560 3.7M ef EFI (FAT-12/16/32) /dev/sdf2 * 11340 9078783 9067444 4.3G 17 Hidden HPFS/NTFS Notice that the number of sectors on that second partition is more than 5MB smaller than the original ISO image. Here is what is on the first partition (the second, hidden, partition contains all the files from the ISO image): loki~ # mount /dev/sdf1/oldsys loki~ # ls -l /oldsys total 4 -rwxr-xr-x 1 root root 106 Oct 29 14:21 .packages.grub2-efi drwxr-xr-x 3 root root 2048 Oct 29 14:21 EFI loki~ # ls -l /oldsys/EFI total 2 drwxr-xr-x 3 root root 2048 Oct 29 14:21 BOOT loki~ # ls -l /oldsys/EFI/BOOT total 3166 -rwxr-xr-x 1 root root 1161312 Oct 29 14:21 MokManager.efi -rwxr-xr-x 1 root root 1157056 Oct 29 14:21 bootx64.efi -rwxr-xr-x 1 root root 1760 Oct 29 14:21 grub.cfg -rwxr-xr-x 1 root root 915832 Oct 29 14:21 grub.efi drwxr-xr-x 2 root root 2048 Oct 29 14:21 locale Evidently, the system is booting from the EFI partition, using the files from the second partition to set up the installation environment. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org