+ Jani-Matti H?tinen <[EMAIL PROTECTED]> [27/01/04 11:09]: > On Tuesday 27 January 2004 09:21, Moshe Kaminsky wrote: > > Now, finally, my question is: how all this affects the mapping of the > > physical drive to the files (/dev/hd*)? What happens if I install the > > bootloader before changing the physical configuration? is there a > > difference between lilo and grub with respect to these questions? > > I'll be happy to have pointers to somewhere where this is explained, as > > currently my understanding of this is very vague. > > The drives are arranged according to bus and lun, i.e. cable and master/slave. > Primary master (first cable, master device) is /dev/hda, > Primary slave (first cable, slave device) is /dev/hdb, > Secondary master (second cable, master device) is /dev/hdc, and > Secondary slave (second cable, slave device) is /dev/hdd. > > So, right now you have gentoo at /dev/hda, mandrake at /dev/hdb, and cd > probably at /dev/hdc. After you make the switch the order will be gentoo > at /dev/hda, mandrake at /dev/hdc (if it's master) and cd at /dev/hdd. That > is, assuming that you'll plug the gentoo drive into the primary cable slot. > (Which I recommend, since sometimes it's faster) > When you install grub (don't know about lilo) during the installation > process, you should use the drives as they are at that point. That is, (hd0) > for the gentoo drive, and (hd0,0) for the first partition on it (if that is > your boot partition). This is because during the installation process grub > will just write the bootloader on the drive, and of course you want it to > write it on the right drive. > In grub.conf the drives should be as they will be when you boot to your new > system. If you plug the gentoo drive into the primary IDE slot, nothing will > change, as the gentoo drive will still be the first (hd0) and the mandrake > drive the second (hd1) hard drive. Note that grub will map the second drive > as (hd1), even though it is at /dev/hdc. However, you'll have to make sure > the mandrake kernel's root option points to the right drive and partition, > i.e. /dev/hdc* > > Hope that helps.
Yes, it does, thanks. Is it correct, therefore, that if I want to test the system with the _current_ configuration, I need to arrange grub.conf accordingly, and then, when I switch to the new arrangement, I will only need to edit grub.conf (without reinstalling grub)? Thanks, Moshe > > -- > Jani-Matti Hהtinen > > > -- > [EMAIL PROTECTED] mailing list >
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