ghost for linux

[Marc M]

might also try dcfldd, it has some enhancements over regular dd....

On 7/13/06, Rick Stevens <rstevens at vitalstream.com> wrote:
>
> On Wed, 2006-07-12 at 19:48 -0700, Harold Hallikainen wrote:
> > > On Tue, 2006-07-11 at 20:22 -0700, Harold Hallikainen wrote:
> > >> Thanks to the help from this list, I now have FC5 running on my HP
> > >> zv6000
> > >> AMD64 laptop. Next trick is to make a backup so I don't mess things
> up.
> > >> Based on suggestions from the list, I'm trying out g4l. I'm making an
> > >> image on a USB hard drive. This seems to work, but I suspect the
> image
> > >> is
> > >> larger than it needs to be because I didn't clear out the unused
> space
> > >> on
> > >> the laptop drive. g4l comes with a simple script to write nulls to
> the
> > >> drive, then delete the created file. The script is:
> > >>
> > >> dd if=/dev/zero of=/0bits bs=20M
> > >> rm /0bits
> > >>
> > >>
> > >> When I run it as root, I get the following errors:
> > >>
> > >> ./CleanDrive.sh
> > >> ./CleanDrive.sh: line 2: dd if=/dev/zero of=/0bits bs=20M: No such
> file
> > >> or
> > >> directory
> > >> ./CleanDrive.sh: line 3: rm /0bits: No such file or directory
> > >>
> > >>
> > >> Ideas?
> > >
> > > When you say "I run it as root", did you "su" or "su -"?  You MUST use
> > > "su -", as "dd" is in /bin and that's not part of a regular user's
> PATH.
> > >
> > > "su" only changes your UID/GID to root.  "su -" also gives you root's
> > > environment (including root's PATH).  Alternately, you could change
> the
> > > script to "/bin/dd if=...." (in other words, specify the full path to
> > > dd).
> > >
> >
> >
> > Thanks! I always wondered what the - did. I just used su. Anyway, I did
> su
> > - and fully specified the path to dd and it still seems to have
> > problems...
> >
> > [root at hhlaptop Desktop]# ./CleanDrive.sh
> > ./CleanDrive.sh: line 2: /bin/dd if=/dev/zero of=/0bits bs=20M: No such
> > file or directory
> > ./CleanDrive.sh: line 3: rm /0bits: No such file or directory
> > [root at hhlaptop Desktop]#
>
> Hmmm, works for me.  You should specify a "count=" parameter as well.
> Example:
>
> [root at prophead work]# dd if=/dev/zero of=/0bits bs=20M count=1
> 1+0 records in
> 1+0 records out
>
> [root at prophead work]# ls -lh /0bits
> -rw-r--r--  1 root root 20M Jul 13 11:31 /0bits
>
> So, if your script is EXACTLY what you said it is, try adding the
> "count=" thing to the end.  Also verify that you indeed have the /bin/dd
> program and that the /dev/zero device exists.  It should look something
> like this:
>
> [root at prophead work]# ls -l /bin/dd
> -rwxr-xr-x  1 root root 34540 Jul 25  2005 /bin/dd
> [root at prophead work]# ls -l /dev/zero
> crw-rw-rw-  1 root root 1, 5 Jun 21 05:12 /dev/zero
>
> Note that the /bin/dd program comes as part of the "coreutils" RPM.
>
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -   You possess a mind not merely twisted, but actually sprained.    -
> ----------------------------------------------------------------------
>
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