diff --git a/baremetal.rst b/baremetal.rst index a78ea3d..c09050f 100644 --- a/baremetal.rst +++ b/baremetal.rst @@ -6,7 +6,7 @@ :Author: Tim Daneliuk (tundra@tundraware.com) -:Version: ``$Id: baremetal.rst,v 1.111 2014/08/23 15:31:28 tundra Exp $`` +:Version: ``$Id: baremetal.rst,v 1.112 2014/08/23 15:35:10 tundra Exp $`` Précis @@ -136,20 +136,26 @@ restoring *partitions*, not disks - you can actually restore to a physical disk that is a different size than the one from which the image was taken. Obviously, there has to be enough room for all the -data on the new disk. This makes it easy to lay your operating system -down on a new, larger disk. Do an image of the old disk, restore it -to the new disk, and then, while still running under the ``System -Rescue CD``, run ``parted`` or ``gparted`` to expand the partitions to -use the additional disk space. +data on the new disk. You can even restore to a *smaller* disk overall, +so long as your full partitions will fit on it. This might be the +case if, say, you original installation's partitions did not use +all of the disk's space. -.. warning:: **Do NOT try this with a machine that boots from SAN!!!** - SAN-booted machines put information into their - bootloaders about the boot LUN's WWID and the necessary - configuration of HBAs to see those LUNs. If you present - a bigger LUN with a different WWID, the OS bootstrap will - probably fail, even though you can properly restore the - image. There are ways around this. This document is not - the place to find these ways. +More commonly, thought, this makes it easy to lay your operating +system down on a new, larger disk. Do an image of the old disk, +restore it to the new disk, and then, while still running under the +``System Rescue CD``, run ``parted`` or ``gparted`` to expand the +partitions to use the additional disk space. + +.. warning:: **Do NOT try restoring to anything other than the original + disk with a machine that boots from SAN!!!** SAN-booted + machines put information into their bootloaders about the + boot LUN's WWID and the necessary configuration of HBAs + to see those LUNs. If you present a bigger LUN with a + different WWID, the OS bootstrap will probably fail, even + though you can properly restore the image. There are + ways around this. This document is not the place to find + these ways. Observations