booting from a cloned hard on a laptop

Question

Hi,
	I cloned a linux CentOS hard drive of a server PC which included a LVM. Then I connected my external hard to the usb port of my laptop.
	I wanted to boot my laptop from the CentOS of external hard so i could use the programs which were installed on PC.So I restarted the laptop and press F11 button to select the desired OS.
	I can see the CentOS of external hard but when select it the following message appears:
=========================================
	Booting 'CentOS (2.6.18-308.24.1.e15)'
root (hd0,0)
	Filesystem type is ext2fs, partition type 0x83
	kernel /vmlinuz-2.6.18-308.24.1.e15 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
	&nbsp;&nbsp; [Linux-bzImage, setup=0x1e00, size=0x1cf514]
	initrd /initrd 0 0x37e62000, 0x18d36e bytes]
Memory for crash kernel (0x0 to 0x0) notwithin permissible range
	Red Hat nash version 5.1.19.6 starting
	unable to access resume device (/dev/VolGroop00/LogVol101)
	mount: could not find filesystem '/dev/root'
	setuproot: moving /dev failed: No such file or directory
	setuproot: error mounting /proc: No such file or directory
	setuproot: error mounting /sys: No such file or directory
	switchroot: mount failed: No such file or directory
	kernel panic - not syncing: Attempted to kill init!
	============================================
by the way, when i log in to windows of my laptop and use Virtual Box, i can mount both boot and lvm partition of external hard and i can see the content of lvm and the programs of my interest.but i cant run the programs.
&nbsp;
Thanks in advance&nbsp;&nbsp;&nbsp;
&nbsp;

andreas_horlach · Answer

If you put the drive into the system rather than into the USB enclosure, can you boot from it there? If so, it's possible that CentOS does not like booting from the USB hard drive, and\or you need to convigure it to be bootable accoring to the CentOS documentation.

aria62 · Answer

my 500GB Seagate hard is of the external type that can only be connected through usb port..

andreas_horlach · Answer

SSR officially doesn't support CentOS, but first find out if that USB drive and CentOS can even be booted the way you are attempting on your particular system. If yes, then it may be a matter simply editing the boot information of that drive, as bootable removable disks and bootable fixed disks have different boot patterns.&nbsp;

aria62 · Answer

I think there is some problem in reference to LVM and i should edit fstab and grub.conf files. but i&nbsp;just have a&nbsp;virtual ubuntu installed on VirtualBox. two questions arise here:
1- can i use a rescue disk to edit fstab and grub without having a real linux os?
2- in&nbsp;virtual ubuntu i can mount 2 partitions of external hard. one of them is&nbsp;labled "BOOT" and another one is&nbsp;labled LVM. and i have access to "grub.conf" of BOOT partition and "fstab"&nbsp;of LVM partition. are these two the files which&nbsp;must be edited?&nbsp;&nbsp;&nbsp;

aria62 · Answer

I got a centos CD to try rescue option. here is the summery of result of "fdisk -l" command:
=================================================
Disk /dev/sdb: 640.1 GB
	device&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; boot&nbsp; start&nbsp;&nbsp;&nbsp;&nbsp; End&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Blocks&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; Id&nbsp;&nbsp;&nbsp; system
	/dev/sdb1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1139&nbsp;&nbsp;&nbsp;&nbsp; 9143296&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27&nbsp;&nbsp;&nbsp; unknown
	/dev/sdb2&nbsp;&nbsp;&nbsp; *&nbsp;&nbsp;&nbsp; 1139&nbsp;&nbsp; 1152&nbsp;&nbsp;&nbsp;&nbsp; 102400&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; HPFS/NTFS
	/dev/sdb3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1152&nbsp;&nbsp;&nbsp; 12791&nbsp;&nbsp; 93489152&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; HPFS/NTFS
	/dev/sdb4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12791&nbsp; 77826&nbsp;&nbsp; 522393600+&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp; Extended
	Partition 4 does not&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end on cylinder boundry.
	/dev/sdb5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 12791&nbsp; 30001&nbsp;&nbsp; 138240000&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; HPFS/NTFS
	/dev/sdb6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 30001&nbsp; 43111&nbsp;&nbsp;&nbsp; 105300160&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; HPFS/NTFS
	/dev/sdb7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 43112&nbsp; 77826&nbsp;&nbsp;&nbsp; 278841357&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; HPFS/NTFS
Disk /dev/sda: 500.1 GB
	device&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; boot&nbsp; start&nbsp;&nbsp;&nbsp;&nbsp; End&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Blocks&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Id&nbsp;&nbsp;&nbsp; system
	/dev/sda1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 13&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 104391&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 83&nbsp;&nbsp;&nbsp; Linux
	/dev/sda2&nbsp;&nbsp; *&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 60001&nbsp; 488279610&nbsp;&nbsp;&nbsp; 8e&nbsp;&nbsp;&nbsp; Linux LVM
Disk /dev/dm-0: 497.9 GB
	Disk /dev/dm-0 doesn't contain a valid partition table
Disk /dev/dm-1: 2000 MB
	Disk /dev/dm-1 doesn't contain a valid partition table
==================================================
&nbsp;

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booting from a cloned hard on a laptop

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