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Re: Unable to boot cloned disk



On Fri, Jun 19, 2009 at 1:17 PM, Sam Varshavchik<mrsam courier-mta com> wrote:
> Markus Kesaromous writes:
>
>> On my workstation, with FC9, I attached a second drive, identical to the
>> linux boot drive.
>> Both drives are SATA.
>> The linux boot drive is a dual boot of windows XP and FC9.
>>
>> In single user mode, I cloned sda to sdb
>>
>> dd if=/dev/sda of=/dev/sdb bs=32M
>>
>> I shut down and remove the second drive and insert it into
>> another workstation.
>>
>> Booting the second workstation fails because it cannot find
>> /dev/root, among other things, and the kernel panics.
>>
>> Repeating the cloning does not seem to have any effect.
>>
>> This effectively says that an OEM cannot have a master disk to clone disks
>> off of it for use in other machines.
>
> Of course an OEM can. I see no reason why not.
>
>> Any ideas how to properly clone fedora disks so that they are bootable
>> on other machines?
>
> For starters, investigate what exactly "among other things" is. The kernel's
> inability to find /dev/root is a direct result of previous errors. It's the
> symptom, but not the cause, of a boot failure.
>
> Even though both drives are SATA drives, they may have different geometry,
> so a sector-by sector copy will result in a somewhat scrambled drive.
>
> Generally, OEMs clone identical drives. Same make and model, same geometry.
>
> Furthermore, drives do not get cloned while the machine is actually booted
> off the drive, and the partitions are mounted. In the best case, booting the
> cloned drive will result in a fsck, and possibly some lost files. Generally,
> when OEM clone drives, they boot off a separate drive, in order to clone a
> given drive.
>
>
> --
refer to a tutorial at

http://mybookworld.wikidot.com/add-new-hdd-to-wdwe

not sure if you need clone boot loader?





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