Backing up system
Michael D. Setzer II
mikes at kuentos.guam.net
Fri Mar 27 17:51:40 UTC 2009
On 27 Mar 2009 at 12:42, Bill Crawford wrote:
From: Bill Crawford <billcrawford1970 at gmail.com>
Organization: None
To: fedora-list at redhat.com
Subject: Re: Backing up system
Date sent: Fri, 27 Mar 2009 12:42:56 +0000
Copies to: "Michael D. Setzer II" <mikes at kuentos.guam.net>
> On Friday 27 March 2009 09:01:30 Michael D. Setzer II wrote:
>
> > It does work best if you clear unused space before doing an image to reduce
> > space since the null filled sectors compress to almost nothing.
>
> How do you do that?
The cd has various scripts and programs on it to help.
cleandrive is the simplest script that free space for linux/unix.
dd if=/dev/zero of=/0bits bs=20M
rm /0bits
That script does it, but no feedback on process. cleandrive5 and cleandrive6
do the same but use Dialog or Xdialog to provide a progress bar. The require
the appropriate dialog program be installed and the jetcat-mod program
copied to the / directory.
For fat32 and ntfs partitions blank6.exe can be used to clear free space for
Windows. The is a lblank6 linux program that does a similar task from linux
on the mounted fat32 or ntfs partition.
Additionally, there are other programs on the web that do this.
Long ago, I had done a Fedora 3 full install on a 80GB disk, and did an
image. Produced a 12GB compressed image file. Then cleared unused
space, and redid image. Only a 2.5GB image file. So, the random
information from the drive took 9.5GB of space.
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Michael D. Setzer II - Computer Science Instructor
Guam Community College Computer Center
mailto:mikes at kuentos.guam.net
mailto:msetzerii at gmail.com
http://www.guam.net/home/mikes
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