To make it bootable on both optical disk media and USB media, one need to run the ISOHybrid command from syslinux. To make such an image bootable, it needs to follow the El-Torito specification.Īt this point, the ISO image would be bootable only by an optical disc media. They were originally designed for optical media file systems such as ISO-9660 or Universal Disk Format (UDF). ISO images are binary file that contains uncompressed exact copy of a file system. ", select the Arch ISO image file and choose "DD Image" (Disk Image mode). See Default cluster size for NTFS, FAT, and exFAT for more details.Ĭheck "Create a bootable disk using. The default cluster size for a disk with a few gigabytes of space and formatted with FAT32 is 4096 bytes. For a live USB, the default cluster size is good enough. It mostly affects performance and wasted disk space. For more details, see What’s the Difference Between GPT and MBR When Partitioning a Drive?įor a bootable device to be seen by a UEFI system, the device must be formatted using FAT32.Ī cluster is the smallest logical amount of disk space that can be allocated to hold a file. GPT is MBR's improved successor and is the one used in this tutorial. This information includes where partitions start and begin, so your operating system knows which sectors belong to each partition and which partition is bootable. MBR (Master Boot Record) and GPT (GUID Partition Table) are two different ways of storing the partitioning information on a drive. Partition scheme: "GPT partition scheme for UEFI" Launch Rufus and select the following parameters:
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