partitions disappeared

sycamorex · 02-10-2006, 06:58 PM

Hallo
I used to run dual boot (xp/fedora core)
Yesterday I installed centos as the third operating system
Centos' grub took over booting, and I must have messed up
something with it, because I cannot boot fedora
I don't have any problem with booting centos and xp

Before the installation my hard disk looked like that:

Disk /dev/hda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 1275 10241406 7 HPFS/NTFS
/dev/hda2 1276 5512 34033702+ f W95 Ext'd (LBA)
/dev/hda3 5513 5525 104422+ 83 Linux
/dev/hda4 5526 7296 14225557+ 8e Linux LVM
/dev/hda5 1276 3187 15358108+ b W95 FAT32
/dev/hda6 3188 5512 18675531 b W95 FAT32

at the moment it's:

[sycamorex@localhost ~]$ df -a
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda6 18381960 5400912 12047272 31% /
none 0 0 0 - /proc
none 0 0 0 - /sys
none 0 0 0 - /dev/pts
usbfs 0 0 0 - proc/bus/usb
none 189676 0 189676 0% /dev/shm
none 0 0 0 - /proc/sys/fs/binfmt_misc

sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs

This is grub.conf

Quote:

#boot=/dev/hda
default=0
timeout=5
splashimage=(hd0,5)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.9-22.0.2.EL)
root (hd0,5)
kernel /boot/vmlinuz-2.6.9-22.0.2.EL ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-2.6.9-22.0.2.EL.img
title CentOS-4 x86_64 (2.6.9-22.EL)
root (hd0,5)
kernel /boot/vmlinuz-2.6.9-22.EL ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-2.6.9-22.EL.img
title Other
rootnoverify (hd0,0)
chainloader +1
title Fedora Core4
rootnoverify (hd0,4)
chainloader +1

Tinkster · 02-10-2006, 07:01 PM

What does fdisk -l show after the install? fstab and/or
df don't really tell us much about the drive...

Cheers,
Tink

sycamorex · 02-10-2006, 07:15 PM

I don't get it

[sycamorex@localhost ~]$ /sbin/fdisk -l
[sycamorex@localhost ~]$

sycamorex · 02-10-2006, 07:16 PM

My apologies (i wasn't root)

Disk /dev/hda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 1275 10241406 7 HPFS/NTFS
/dev/hda2 1276 5512 34033702+ f W95 Ext'd (LBA)
/dev/hda3 5513 5525 104422+ 83 Linux
/dev/hda4 5526 7296 14225557+ 8e Linux LVM
/dev/hda5 1276 3187 15358108+ b W95 FAT32
/dev/hda6 3188 5512 18675531 83 Linux

pljvaldez · 02-10-2006, 07:24 PM

It looks to me like your Fedora entry needs to be either (hd0,2) or (hd0,3) depending on whether it is installed on /dev/hda3 Linux or /dev/hda4 Linux LVM. Grub starts counting at 0, so /dev/hda1 is (hd0,0)

pljvaldez · 02-10-2006, 07:26 PM

Also, it just dawned on me that you may need to specify the kernel and initrd just like in CentOS grub listing because grub wasn't installed on the root partition, so chainloader +1 probably won't work.

sycamorex · 02-10-2006, 07:30 PM

On the boot up, on the grub screen, when I choose Fedora,
the screen goes black and it goes back to the grub screen.
I remember that during installation of centos, grub found obviously
centos and other (winxp), and then i manually added
the fedora partition (I guess, that was the one) and when asked
about mounting point I chose '/'
When I opened then grub.conf, fedora was under hda3 so I changed
it to hda4 (because that should be the one - 14G)
I'll appreciate any help
thank you

pljvaldez · 02-10-2006, 07:35 PM

Since it is on /dev/hda4, this is (hd0,3) to Grub.

Also, you may need to go into your fedora partition from CentOS (/dev/hda4) and look under boot for what kernel (vmlinuz-blahblahblah) and initrd (initrd-blahblahblah).

Your Fedora section should look something like this:

Code:

title Fedora4
root (hd0,3)
kernel /boot/vmlinuz-blahblahblah ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-blahblahblah.img

Only with the proper vmlinuz and initrd

sycamorex · 02-10-2006, 07:42 PM

With (hd0,3) I get the error

Booting 'Fedora core 4)
rootnoverify (hd0,3)

Error 13: Invalid or unsupported executable format

I will check the kernel
thanks

sycamorex · 02-10-2006, 07:44 PM

What exactly am I supposed to do to check the kernel?

pljvaldez · 02-10-2006, 07:47 PM

Sorry. Boot into CentOS. Then mount /dev/hda4. Then go to the /boot directory (on /dev/hda4). Then write down the name of the vmlinuz-XXXXXXXXXXX file and the initrd-XXXXXXXXXXX.img file. Then make your grub entry look like this:

Code:

title Fedora4
root (hd0,3)
kernel /boot/vmlinuz-XXXXXXXXXXXX ro root=LABEL=/ rhgb quiet
initrd /boot/initrd-XXXXXXXXXXXX.img

of course, replacing the XXXXX's with the right filename.

sycamorex · 02-10-2006, 07:52 PM

When I wrote
[root@localhost dev]# mount /dev/hda4
mount: can't find /dev/hda4 in /etc/fstab or /etc/mtab
[root@localhost dev]#

sorry, I am a newbie

pljvaldez · 02-10-2006, 07:54 PM

Can you post the contents of /etc/fstab for me?

sycamorex · 02-10-2006, 08:03 PM

[root@localhost sycamorex]# cat /etc/fstab
# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/ / ext3 defaults 1 1
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/VolGroup00/LogVol01 swap swap defaults 0 0
/dev/hdc /media/cdrecorder auto pamconsole,fscontext=system_u

bject_r:removable_t,exec,noauto,managed 0 0

pljvaldez · 02-10-2006, 08:17 PM

As root, do this:

mkdir /mnt/temp
mount -t ext3 /dev/hda3 /mnt/temp
cd /mnt/temp
ls