I've re-run the setup but it still doesn't work. df -h /dev/sda1 3.8G 190M 3.6G 5% /run/media/joseph/4GB_ysa
/dev/sda1 * 2048 7864319 3931136 b W95 FAT32 while usb not mounted: dd if=/usr/share/syslinux/mbr.bin of=/dev/sda 0+1 records in 0+1 records out 440 bytes (440 B) copied, 0.00121707 s, 362 kB/s While usb mounted: cp -r /mnt/cdrom/* /run/media/joseph/4GB_ysa mv /run/media/joseph/4GB_ysa/isolinux/* /run/media/joseph/4GB_ysa mv /run/media/joseph/4GB_ysa/isolinux.cfg /run/media/joseph/4GB_ysa/syslinux.cfg rm -rf /run/media/joseph/4GB_ysa/isolinux* mv /run/media/joseph/4GB_ysa/memtest86 /run/media/joseph/4GB_ysa/memtest sed -i -e "s:cdroot:cdroot slowusb:" -e "s:kernel memtest86:kernel memtest:" /run/media/joseph/4GB_ysa/syslinux.cfg umount /run/media/joseph/4GB_ysa syslinux /dev/sda1 Does the "dd if=/usr/share/syslinux/mbr.bin of=/dev/sda" has to be run when USB is mounted or unmounted? -- Joseph