Boot from CD in grub - BootableCD line in GRUB menu??

Wooff

Hi, is it possible to have "Boot from CD" line in grub menu? To boot from gentoo liveCD or knoppix. And is it possible to boot from any other bootCD like WinInstalCD?
Can you write me full grub line? Thanx a lot ((-:
W

feivelda · Posted: Mon Aug 29, 2005 12:07 pm Post subject:

I don't know it for sure, but try

rootnoverify (hd2,0)
makeactive
chainloader +1

At rootnoverify you should use the link in /dev for your cdrom.
At my machine, this would be hdc, so hd2,0

Wooff · Posted: Mon Aug 29, 2005 12:34 pm Post subject:

hi, thanx for reply.
how can I find this link to cdrom?
Do I need to create it?

I read something about links inside grub (grub# map (hd3) (hd1)). It is this.
W

feivelda · Posted: Mon Aug 29, 2005 2:09 pm Post subject:

What I mean, is in /dev

You mount your cdrom by mount /dev/cdrom or /dev/dvd
But the same should done by mount /dev/hdc
Try this, if this works, edit your grub.conf and tell me if you can boot from cd

opqdan · Posted: Mon Aug 29, 2005 4:58 pm Post subject:

Your PC should boot from a bootable CD automaticlly if it is in the drive, completely bypassing Grub. What use do you have for needing it as an entry in the grub menu? If you put the CD in and reboot the computer, it will boot into the disk before it even gets to grub. This goes for any bootable CD whether it be a Linux distro or Windows. Just make sure that your bios is set to have the CDROM checked before the hard disk.

feivelda · Posted: Tue Aug 30, 2005 6:03 am Post subject:

At this point you don't have the choice to boot your system on hard disk or the system on cd.
And with this view it isn't so useless, because you don't need to change your boot sequence every time.

Wooff · Posted: Wed Aug 31, 2005 7:00 am Post subject:

TO opqdan: Its easy. I just dont want to change boot sequence every time and even more I can easyly set a password to BIOS and password to GRUB at BOOTCD line. Its mean nobody will be able to boot to my machine.

TO feivelda: I dont know how and what shout I write to grub.conf

title boot CD
root (hd2,0)
?????

feivelda · Posted: Wed Aug 31, 2005 8:38 am Post subject:

Wooff · Posted: Thu Sep 01, 2005 8:12 am Post subject:

hmm it does not work

there is map device file
/boot/grub/device.map
where you can map physical devices to grub name
I have there: map (hd2) (/dev/cdroms/cdrom0)
and when try to boot it cant find that device ))-:
W

cyrillic · Posted: Fri Sep 02, 2005 2:51 am Post subject:

syg00 · Posted: Fri Sep 02, 2005 4:32 am Post subject:

Wellll... maybe, maybe not.
Here's one solution I saw a while back - others have created (fd) images on CD and made them bootable.
Some-one will always find a way to hack anything ...

Edit: Added the link.

psy_ill · Tux's lil' helper Joined: 06 Jul 2003 Posts: 106

There is a point in booting the cd from GRUB instead of letting the BIOS do the work: I want to install MS-DOS (needed for my old music software for the OPL3-chip, there is no other program which does the same thing) to one hard drive and MS-WINDOWS (needed for my digital camera to work, Linux doesn't support it yet) to another hard drive.
Now, there is a problem: both OS:s claims the MBR for themselves and does not accept being installed in any hard drive other than the master on the first controller. In order to do this, I must first install one of the OS:s, move around my hard drives and then install the other.
If I could boot a cd from GRUB, I would be able to do the hard drive swapping in software (in GRUB) instead of irl and the procedure (which may be needed to redo) would cause me less of a headache.

cyrillic · Posted: Fri Sep 02, 2005 4:12 pm Post subject:

syg00 · Posted: Fri Sep 02, 2005 11:29 pm Post subject:

Look at the link I posted - it's a solution that allows selection of a CD for booting from a HD based grub boot.