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The Monday 2007-04-30 at 02:13 -0400, Bob S wrote:
> > dd is dumb: if you take the image of a 100 GB disk and dd it to a new 200
> > GB disk, you loose 100 GB.
>
> OK Carlos, many thanks for that. Didn't realize that dd could do that.
> Thought
> it just copied files and directories to be restored to existing partitions.
dd donesn't know directories nor files. It copies from start to end
everything, including the inodes, the partition table, bootsectors, empty
space... everything in the range. Even the errors.
> > > I am thinking when the drive is returned (they will have formatted it)
> > > That I will have to format it again to ext3, and build my partitions
> > > exactly as they were, and I am not sure how I can duplicate it exactly.
> >
> > Does it matter?
> >
> > Does it matter if a partition is a bit bigger or smaller, even if it is a
> > diferent type? Linux doesn't care, it will work anyway. You can use the
> > chance to change your partition types/sizes.
>
> Welllll....You're right. It doesn't really matter if dd (or others) recreate
> the drive as the original was. I was worried that everything would be just
> run together in one big partition with no space between/after the copied
> partitions.
Carefull! It doesn't matter with tars (or dars). It does with dd.
> So, what you are saying is just restore and everything will be taken care of
> automagically, but if I want to, I can change partition sizes and restore to
> the newly created partitions on an individual basis.
Certainly not automatically.
You can recreate your partitions as you wish, even a diferent number of
partitions - provided you use a restore procedure that copies directories
and files, and that there is enough space.
You are copying things from one filesystem to another filesystem
structure, that will have the same /, /usr, /home, directories. The copy
programs do not care how/where the real partitions below are.
- --
Cheers,
Carlos E. R.
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