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Old 11-17-2012, 11:36 PM   #1
Registered: Oct 2007
Location: Singapore
Distribution: OpenSuse, Slackware, Redhat
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Install Redhat but GRUB not able to boot my intitial slackware distro

Hi all,

i have slackware in my system first, then later install rhel 6 in system recently.

However the rhel grub is not able to boot my slackware.

below is my fdisk partitions.
sda2 is my slackware root
sda3 is my /home
sda4 is rhel root
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xbc39bc39

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1         249     2000061   82  Linux swap / Solaris
/dev/sda2   *         250        2490    18000832+  83  Linux
/dev/sda3            2491        6429    31633251   83  Linux
/dev/sda4            6429        9730    26516480   83  Linux
Next below is my grub.conf
title Red Hat Enterprise Linux (2.6.32-71.el6.i686)
    root (hd0,3)
    kernel /boot/vmlinuz-2.6.32-71.el6.i686 ro root=UUID=e0a55e82-5fcd-41f5-a45d-e4866848d1ae rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet
    initrd /boot/initramfs-2.6.32-71.el6.i686.img
title Slackware
    rootnoverify (hd0,1)
    chainloader +1
Anybody able to assist me how to modify GRUB to boot my slackware?
Error i have enountered in "Invalid or unsupported format"


Last edited by vitalstrike82; 11-17-2012 at 11:51 PM.
Old 11-18-2012, 08:44 AM   #2
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Registered: Nov 2003
Location: Minnesota, US
Distribution: Fedora, Linux Mint, Ubuntu
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Looks like you don't have grub installed in /dev/sda1, but in the MBR of /dev/sda.
You could modify RH's grub.conf entry for Slack to point to the slack kernel and initrd
title Slackware
    root (hd0,1)
    kernel /boot/vmlinuz...
    initrd /boot/initramfs...
or, you could install grub in /dev/sda1 (in addition to the MBR of /dev/sda) and keep your current grub.conf file


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