At Thu, 05 May 2011 12:13:18 +0100 CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
> Is there a standard way of copying a working system
> from one machine to another with different partitions?
>
> I have two CentOS-5.6 machines, say A and B,
> and I thought I would copy / on sdb10 on machine A
> to an unused partition sda7 on machine B with rsync.
> I made the appropriate changes to /etc/fstab and grub.conf ,
> as well as /etc/sysconfig/network-scripts ,
> but found that there were innumerable errors
> when I booted machine B into the new system,
> mostly to do with creating dev's.
> Also the ethernet connection, which had been eth1 on A,
> was now eth0 on B, and this did not work.
It sounds like you have problems *other* the 'copy' part.
After copying the system, you will likely need to remake the initrd on
the target system. Oh, you will need to edit /etc/modprobe.conf:
different SATA driver, different ethernet driver, etc.
>
> This was only a kind of experiment.
> There is a problem with the partition table on machine A,
> and I thought it would be useful to have a backup machine
> with exactly the same setup.
>
> Is this a hopeless enterprise, or can it be done easily?
It is easy enough to do. There are just a few more things involved
besides copying the data and diddling with grub.conf, /etc/fatab, and
/etc/sysconfig/network-scripts. You just forgot about /etc/modprobe.conf
and forgot to remake the the initrd.
>
--
Robert Heller -- 978-544-6933 / heller@xxxxxxxxxxxx
Deepwoods Software -- http://www.deepsoft.com/
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