Hello all, I have added support for El Torito with no emulation mode into the CVS right now. The patch is originally written by Leonid Lisovskiy, and I myself modified his patch and added some features.
Here is his comments on the original patch: > Below is very short documentation for this patch. > > This patch add capability of recognizing/reading ISO9660+RockRidge filesystem > to Grub and has following limitations: > > 1) It cannot process multisession CD (recognizes only first session), > but bootable CD cannot be multisession. > > 2) It cannot mount CD if it is not attached to system by BIOS > previously ( i.e. CD-drive mapped by BIOS itself to (hdxx) ) - because most of > BIOS'es has broken capability turning on El'Torito emulation by BIOS INT > 13h AX=4A00h call. > > 3) It don't support RockRidge symlinks yet. > > 4) It don't add special device name of CD-ROM to Grub, e.g. (cd0) - > usually BIOS maps CD-ROM to (hd31) or number_of_last_real_hdd+1 > > > Example how to make a bootable CD with Grub: > > mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot -boot-load-size 1 > -boot-info-table <root-of-iso-tree> > > You have to omit device name from Grub boot menu file (menu.lst) to > force substitution of boot device name, it will be determined > automatically by Grub during stage1 load. But I have added a new drive name (cd) for a CDROM drive. This is assigned only if you boot GRUB from a CDROM drive. So you can specify (cd) in your config file or in the command-line interface, if you wish. For now, I haven't added information about this into the manual yet. I hope someone will contribute to this task. Since this patch has changed some critical parts substantially, I'd like many people to test the CVS version, in particular if can test a bootable CDROM. Please report your result to this list, whether it is successful or not. If you don't know how to get the CVS version, take a look at the GRUB web site. Cheers, Okuji _______________________________________________ Bug-grub mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-grub
