![]() ![]() Choosing ext2 as the boot filesystem hides it from windows systems, and makes the second fat32 partition visible. Last_sector = num_cyl*255*63 - 1 = 2008124ĥ) We’ll make two partitions: a small boot partition with a ext2 filesystem and a second fat32 (or ntfs) partition to hold the iso files. Here we’ll use the standard 63 sectors/track and 255 heads, so to calculate the number of cylinders and the last sector of the last cylinder, do the following: We’ll be using command line linux applications to reach our goal, any distro will do.ġ) Find the path to your usb device, here we’ll use /dev/sdbĢ) Optionally, to erase the usb device, issue the following commands as root:ģ) Note down the size of the device in bytes:Ĥ) To make fdisk happy, partitions must end on cylinder boundaries. ![]() We’ll install grub4dos as boot loader, using the ‘triple mbr’ feature to increase the compatibility with different mainboard and BIOS configurations. This means you can just download almost any bootable iso and boot it without having to burn a cd or unpack the iso. The goal is to make a universal bootable usb device with a small boot partition and a data partition on which we’ll store the iso files. ![]()
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June 2023
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