[Gllug] moving system from one disc to another

[James Hawtin]

On Thu, Sep 02, 2010 at 01:02:35AM +0100, Nix wrote:
> On 31 Aug 2010, James Hawtin outgrape:
> > You can dump and restore on a live system! 
> 
> Not safely (at least, you can't safely dump a mounted filesystem). dump
> and restore access raw devices directly, and Linux's raw devices are not
> cache-coherent with the filesystem: in particular, you can have pieces
> of metadata inconsistently visible through the block device which have
> actually been completely written to the device, or vice versa. That way
> lies madness (at least it does if the filesystem is busy).

Nothing else is going to be able to see changes either, all have problems
the best way to do it is to use LVM snapshots and then dump those. My / and
/boot are stable pretty much all the time to dump as i seperate /tmp and
/var.

When I said Live I ment as in turned on, not as in people using it hard.

James
-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug