Re: dd Partition Recovery Procedure?!?

ray <ray@xxxxxxxxxx> wrote:

On Fri, 28 Dec 2007 10:44:55 -0500, Doug Mitton wrote:

x0054 <x0054@xxxxxxxxx> wrote:

Doug Mitton <doug_mitton@xxxxxxxxxxxxx> wrote in
news:31p7n39gdii0pjh3kptoia4ug1lt5k583n@xxxxxxx:

There have been some threads in the past several months on how to
recover a hard drive installation using the `dd` command between to
mismatched drive sizes. I just can't seem to find them. Does anyone
have any links or a procedure?

What I'm referring to is ... `dd` the drive image from a smaller
partition to a larger partition ... now the problem is the larger
partition thinks it is the same size as the smaller one. There had
been a thread at one point of some commands to recover the lost space
... for both Linux and MSWin as I (seem to) remember.

Any pointers or comments would be appreciated. TIA!

What type of file system are you using? I believe that there are commands
to extend or grow most file systems. For instance, I know for sure that
it's possible with riserfs. Let us know which file system you are using and
I am sure some one can help, this is a pretty simple thing I believe,
though I never had to do it my self.

- Bogdan

I'm using ext3. I thought there were some "detailed" instructions to
do this but maybe I was mistaken. Thanks!

If I properly understand your question, there should really be no problem.
When I replaced the hard drive in my laptop with a larger one, I backed
the partitions up to an external drive using partimage from a live CD -
then I swapped drives - then I restored to the new drive using partimage
from a Live CD. At this point, all partitions were exactly the same as
they had been, so I used gparted from the Live CD to resize the ones I
wanted to.

There isn't really a problem ... I accomplished the task using
`\cp -a /sourcedir /destdir`

I was trying to find some old information that I had read once in one
of the "general" Linux groups about some "manual" method of "fixing" a
drive image created by `dd` between mismatched drive sizes. The `cp`
commands seems slower than `dd` so I was looking for alternatives for
a future recovery.

I'll have to experiment with `partimage`, I haven't used it for a VERY
long time. Thanks for the response.

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