Re: Merging EXT2 and El Torito

H. Peter Anvin (
7 Mar 1998 05:15:41 GMT

Followup to: <>
By author: Sascha Ziemann <>
In newsgroup:
> Hi,
> it is possible to put a EXT2 filesystem on a CD in order to use it as an
> read only root filesystem. This requires a boot floppy, which holds the
> kernel. The only way to avoid such a floppy is to create a bootable CD.
> El Torito is the name for a standard to boot CDs. It is about 20 pages
> and you can find it at
> The problem with El Torito is that it was designed to be compatible with
> ISO9660 and not with EXT2 (must be some kind of bug ;-). In order to be
> able to boot directly a EXT2-CD, the EXT2 format needs some changes.
> Those parts need to be left untouched by the EXT2, where the BIOS
> expects the El Torito information.
> Now my question: Is here anybody who is able and interested in extending
> the EXT2 filesystem to be able to create bootable EXT2 CDs?
> Please tell me, when you think, that I am totally wrong and that the
> idea of a bootable EXT2 CD is complete nonsens. I don't know much about
> EXT2 and bootable CDs.

Why not simply boot with an ISO 9660/RockRidge filesystem as root?
Unlike some other operating system, Linux can use an ISO 9660
filesystem as root with no problems...


    PGP: 2047/2A960705 BA 03 D3 2C 14 A8 A8 BD  1E DF FE 69 EE 35 BD 74
    See for web page and full PGP public key
        I am Bahá'í -- ask me about it or see
   "To love another person is to see the face of God." -- Les Misérables

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to