[CentOS] resize an image file

Dennis McLeod dmcleod at foranyauto.com
Wed Nov 21 23:59:45 UTC 2007

I use Clonzilla to do this. 
XP machines and Linux machines, backed up to a Samba share. (So far)

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
Of Jerry Geis
Sent: Wednesday, November 21, 2007 10:27 AM
To: CentOS ML
Subject: [CentOS] resize an image file

I have a 100G disk on an old redhat 7.3 system.

Filesystem            Size  Used Avail Use% Mounted on
/dev/hda1             9.6G  2.4G  6.7G  27% /
/dev/hda3              99G  6.1G   88G   7% /home
hda2 is 2G swap

I am trying to back that complete image up on my centos 5 system.
I can do the dd if=/dev/hda bs=1M | ssh root at machine 'cat > disk.img'
which gets me the whole 100G.

As you can see most of the disk is unused.
Is there a way to trim the resulting image to only be 10G instead of 100G?


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