The ISO is generated using agent based installer fails to boot when made as USB using "dd if=<iso> of=<usb>" .

The problem can be seen with 4.13 and onwards. We see the difference as,


4.12 ->

# fdisk -l agent.x86_64.iso
Disk agent.x86_64.iso: 1.1 GiB, 1213202432 bytes, 2369536 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: 0x22b30944Device            Boot Start     End Sectors  Size Id Type
agent.x86_64.iso1 *        0 2369535 2369536  1.1G  0 Empty
agent.x86_64.iso2        180    9411    9232  4.5M ef EFI (FAT-12/16/32)
# 


4.13 -> 
# fdisk -l agent.x86_64.iso
Disk agent.x86_64.iso: 1 GiB, 1108721664 bytes, 2165472 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



4.14 -> 
# fdisk -l agent.x86_64.iso
Disk agent.x86_64.iso: 1.1 GiB, 1157167104 bytes, 2260092 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


Now, the ISO does grabs the label if I write that to a USB stick,

# blkid /dev/sda
/dev/sda: BLOCK_SIZE="2048" UUID="2024-01-30-10-36-15-21" LABEL="rhcos-414.92.202310210434-0" TYPE="iso9660"

Same label would be shown on ISO but some how due to the way ISO is build with 4.14/4.13 it fails to create the root partitions separately as it seems.

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