The kernel supports the important file systems (ext2/ext3/ext4, reiserfs, reiser4, btrfs, xfs, jfs, vfat, ntfs, iso9660), as well as network filesystems (samba and nfs).

isoloop=xxx:
Grub2 (currently in development: grub-1.98) provides a new feature to boot from an ISO image which is stored from the hard disk. If you put a copy of systemrescuecd-x86-x.y.z.iso on a partition that Grub2 can read then you can boot SystemRescueCd directly from the ISO image stored on your hard drive. This is very convenient if you frequently update SystemRescueCd and you want to boot it directly from Grub2. Grub2 knows what an ISO image is and it will load the kernel image (rescuecd/rescue64) and the initramfs (initram.igz) from the ISO into memory. It will then do its normal job and execute the kernel. The SystemRescueCd init script must then be aware that its sysrcd.dat file is in an ISO and not directly on the partition. For that reason, this isoloop=xxx boot option is required so you must use it in your grub.cfg. This option is only supported in SystemRescueCd-1.4.0 and more recent. This option specifies the path of the ISO image in the partition that grub considers as its root partition. It's important to understand that the path of the ISO image may be different from the path on your linux system. If you have a separate boot partition mounted on /boot and if you copy this ISO image to /boot/sysrcd/systemrescuecd-x86-x.y.z.iso then the option has to be isoloop=/sysrcd/systemrescuecd-x86-x.y.z.iso. This is because the boot partition is what Grub2 will consider as its root partition during the boot process. Please read the section about isoloop for more details.

работает только с grub2 или я ошибаюсь?