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Old 06-16-2003, 01:08 AM   #1
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modifying grub bootloader w/ gui (rh8)

When my bootloader comes up I can choose Linux (master hd - hda1) and it will boot fine..but i try and choose the Windows hd (slave hd -- hdb1) it says disc not found..I tried running through the rescue options on the rh8 installation but I didn't have any luck installing a new there anyway within the gui of rh8 to modify what hd and where it accesses the files so I can get my windows back up and working (the hd has win already installed and works properly)
Old 06-16-2003, 02:38 AM   #2
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Distribution: RedHat (RHEL, FC, CentOS), openSuSE, Mac OS X
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if linux automounts the windows hard drive, run
whilst at the console, that will give you the actual mount point
So, if you find the actual HDD then you can edit the grub boot menu
/boot/grub/some file ... real obvious when you look, but i haven't got it here :P

alternatively, /etc/fstab contains a list of all mount points

IF however you don't have a mount point configured, then you need to work out where the HDD is actually connected
primary master is /dev/hda
primary slave is /dev/hdb
seconday master is /dev/hdc
and secondary slave is /dev/hdd

so where ever it is. then you need to know what partition on it, but that's easy enough really coz odds are it's the first one
so just try mounting the different /dev/hdb1 etc to some directory (that's empty)

for instance mkdir ~/temp
mount /dev/hdb1 ~/temp

~ is your home directory /home/YOU

when you find what HDD contains all the windows directories, just point grub to it.

Now be reasonable run df first, to see if it's mounted,
then mount the drives in sequence so mount the first, then umount it, then the second until you're done
you might need to be root, i forget, you will need to be root to edit the grub menu.

Unfortunately all of this happens in the console, except for editing grub.

One last thing, don't change the lines in grub that relate to linux, coz if you do, you might break the bootloader (so if you ain't sure, BACK UP)

best of luck
Old 06-16-2003, 01:33 PM   #3
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thanks for all the info..ill try that and see how it goes
Old 06-17-2003, 11:33 PM   #4
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Here is my grub.conf file:


title Red Hat Linux (2.4.18-14)
root (hd0,0)
kernel /vmlinuz-2.4.18-14 ro root=LABEL=/
initrd /initrd-2.4.18-14.img
title Windows
rootnoverify (hd1,0)
chainloader +1


in my df list i have the primary slave mounted as:

/dev/hdb1 /mnt/win

My question is, what/how do I edit the grub file to point to this other HD so in my GRUB menu I can boot to either win or lin?


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