Restore-Boot Multi-disk

[Candido Aramburu]

im sorry ....

There are 3 hard disks = 2 PC computers + 1 external usb disk

Disk 1: Original linux SO at old PC computer : hda ( old internal disk)
Disk 2: New PC computer: sda ( new internal disk)
Disk 3: external usb disk connect to the New PC: sdb

Backup: hda -> sdb1
Restore:sdb1->sdb3
Boot: GRUB it is installed in sda and active partition is sda2 with /boot, you named it INTERNAL disk. The grub.conf has a entry to linux SO sdb3

******** grub.conf of sda2 ****

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,1)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/sda2
default=2
timeout=60
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.16-1.2080.16.rdt.rhfc5.ccrmasmp)
root (hd0,1)
kernel /vmlinuz-2.6.16-1.2080.16.rdt.rhfc5.ccrmasmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.16-1.2080.16.rdt.rhfc5.ccrmasmp.img
title Fedora Core (2.6.16-1.2080.16.rdt.rhfc5.ccrma)
root (hd0,1)
kernel /vmlinuz-2.6.16-1.2080.16.rdt.rhfc5.ccrma ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.16-1.2080.16.rdt.rhfc5.ccrma.img
title Fedora Core (2.6.15-1.2054_FC5smp)
root (hd0,1)
kernel /vmlinuz-2.6.15-1.2054_FC5smp ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.15-1.2054_FC5smp.img
title WINDOWS XP
rootnoverify (hd0,0)
chainloader +1
#
# Boot from SO linux at disk portable, partition 3.
#
title Fedora Core (2.6.18-1.2257.fc5) PORTABLE
#
# root (hdX,Y)->the GRUBs root device to the partition containing the boot directory for the boot # process.
# It may not be the root directory for the Fedora Core installation.
# Its usually the the filesystem mounted at /boot when the system is running
# Is the /boot partition, containing the linux kernel image file. Find /etc/grub/
#
#
root (hd1,2)
#
# kernel /vmlinuz -> tells GRUB where to find the kernel files whithin the root filesystem for the
# boot process
# kernel arguments:
# ro: -> tells kernel to mount the root filesytem as read only
# root=/dev/sdb3 -> is the device partition where the root partition is mounted,
# the root filesystem for Linux core.
# rghb -> is the red hat graphical boot
# quiet -> only important and critical messages are printed at console
#
kernel /boot/vmlinuz-2.6.18-1.2257.fc5 ro root=/dev/sdb3 rhgb quiet
initrd /boot/initrd-2.6.18-1.2257.fc5.img

************External disk sdb3: fstab file
[root@s167m40 candido]# gedit /media/DISCLINUXNAGUSI/etc/fstab ****

/dev/sdb3 / ext3 defaults 1 1
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
/dev/sdb3 swap swap defaults 0 0
/dev/grupoprueba/vologicprue1 /data ext3 defaults 0 0


******** fdisk -l at New PC with the external disk mounted**************

[root@s167m40 candido]# fdisk -l

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 7452 59858158+ 7 HPFS/NTFS
/dev/sda2 * 7453 7465 104422+ 83 Linux
/dev/sda3 10721 14593 31109872+ 5 Extended
/dev/sda4 7466 10720 26145787+ 8e Linux LVM
/dev/sda5 10886 14593 29784478+ b W95 FAT32

Partition table entries are not in disk order

Disk /dev/sdb: 100.0 GB, 100030242816 bytes
255 heads, 63 sectors/track, 12161 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 1386 11133013+ 83 Linux
/dev/sdb2 1387 2661 10241437+ b W95 FAT32
/dev/sdb3 2662 4063 11261565 83 Linux
/dev/sdb4 4064 7250 25599577+ 7 HPFS/NTFS
[root@s167m40 candido]#



THANKS

[devils casper]

External disk has two Linux Partitions. sdb1 and sdb3. you have restored image in sdb3. where is SWAP partition?
in case, you didn't create any SWAP space, put # sign before SWAP entry in fstab file of sdb3.

/dev/sdb3 / ext3 defaults 1 1
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
# /dev/sdb3 swap swap defaults 0 0
/dev/grupoprueba/vologicprue1 /data ext3 defaults 0 0

Casper

[Candido Aramburu]

without saw line in fstab file the messages errors are same ... it can not mount the filesystem ... i dont undersand why the message display information about hda5 ( the old computer)...

THANKS

[devils casper]

check the contents of mtab file in sdb3. meanwhile, i will look into this. kernel should read current fstab file only.






Casper

[Candido Aramburu]

[candido@s167m40 ~]$ gedit /media/DISCLINUXNAGUSI/etc/mtab

/dev/hda2 / ext3 rw 0 0
proc /proc proc rw 0 0

hda2 is the second partition of the old PC where the old linux OS was load

THANKS

[devils casper]

that makes a sense if your old hdd has hda2 Extended partition.
edit this file and set it to sdb3.

/dev/sdb3 / ext3 rw 0 0
proc /proc proc rw 0 0

Casper

[Candido Aramburu]

[root@s167m40 candido]# cat /media/DISCLINUXNAGUSI/etc/mtab

/dev/sdb3 / ext3 rw 0 0
proc /proc proc rw 0 0

[root@s167m40 candido]#

The error messages continue identical ....

[Candido Aramburu]

I have "simulate" a installation on portable hard disk with the FEdora 5 installation first CD disk (1/5)
and when it ask about the location of the linux installation ONLY sda (internal disk) can see in the dialogue menu ...

[devils casper]

execute fdisk -l in rescue shell. check if it recognizes all disks.








Casper

[Candido Aramburu]

In rescue shell it recognizes all disk and partition
THANKS
Candido