[CentOS] CF disks images and centos

[Robert Heller]

At Tue, 30 Nov 2010 12:26:04 -0600 CentOS mailing list <centos at centos.org> wrote:

> 
> On 11/30/2010 12:10 PM, Brunner, Brian T. wrote:
> >
> >>> The size has changed. The original CF card was 7637M (255 heads/63
> >>> sectors/928 cylinders)
> >>> The new CF card is 8019M (255 heads/63 sectors/974 cylinders)
> >>>
> >>> I simply do "dd if=cf.img of=/dev/sde" to copy the images to CF.
> >>
> >> ARG!!! Don't do this!  You really, really don't want to dd a
> >> raw disk image (including mbr/partition table) to a
> >> *different* geometry disk -- it does not matter what the
> >> 'disk' tech is (IDE. SCSI, SATA, SSD, etc.).
> >
> > Even if the two disks have the same manufacturer and manufacturer part
> > number, different firmware revisions can fail to boot after
> >
> > dd if=/dev/spinpoint.partnumber.fwrev1
> > of=/dev/spinpoint.partnumber.fwrev2
> >
> > Been there, done that, got bit where the sun doesn't shine.
> >
> >> Partition the new disk with fdisk (or something like that),
> >> then use mkfs to make the file systems than use dump/restore
> >> to move the file systems.  Finally use grub-install (or lilo)
> >> to install the boot loader.
> >
> > +1
> > sfdisk -d /dev/olddisk>  /product/partition.layout
> > dump (whatever)
> >
> > ...years later...
> >
> > sfdisk /dev/newdisk<  /product/partition.layout
> > restore (whatever)
> > grub-install (magic tbd)
> > # SHIP IT
> 
> I'm not positive, but I'd expect clonezilla to get this right - and 
> probably be able to expand the partition after the copy for you.  Plus 
> it will save time compared to dd by not needing to copy unused disk 
> blocks and it can save a compressed image on a file server for repeated 
> cloning.

Right.  clonezilla is much more than dd.  I would suspect that
clonezilla is a bundling of sfdisk, dump/restore, and grub-install, or
something link that.

> 
> --
>    Les Mikesell
>     lesmikesesll at gmail.com
> 
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>                                                 

-- 
Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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