[Udpcast] Zero-izing windows drive

Donald Teed dteed at artistic.ca
Thu Jul 29 23:31:52 CEST 2004


There are some hints on the g4u website:

http://www.feyrer.de/g4u/#shrinkimg

There is a perl script and an exe to do this from Windows.

--Donald Teed


On Thu, 29 Jul 2004 cmonster at icehouse.net wrote:

> 
> Please send the folowup question to the group as well. I don't know how to
> do it in Windows.
> Glad to help,
> 
> Lee
> 
> -----Original Message-----
> From: cmonster at icehouse.net [mailto:cmonster at icehouse.net]
> Sent: Wednesday, July 28, 2004 10:47 PM
> To: Lee Kransen
> Subject: RE: [Udpcast] Image size bigger that actual space used
> 
> Thanks for the reply. I kind of thought it might something like that. These
> are
> widows systems I am imaging. How would I zero-ize the drive it windows?
> 
> 
> Quoting Lee Kransen <lee at servision.net>:
> 
> > 1. Although 2.5/20 is currently in use it could be that much of the rest
> of
> > the 20GB was once written to and now does not contain strictly 0000000's.
> In
> > this case the compression will not be as great as it could be. You may
> want
> > to use the suggested procedure for Zero-izing your disk before turning it
> > into a compressed image. This will have to be done for each partition on
> the
> > disk.
> >
> > -----------------------------------------------
> > On the live system, just create a huge file:
> >
> > dd if=/dev/zero of=filler-file
> >
> > After a while, the dd will error out with a "disk full" error.
> >
> > Then, do a couple of syncs, and remove the file.
> >
> > sync
> > sync
> > rm filler-file
> > -----------------------------------------------
> >
> > 2. lzop is designed for speed and not compression. Try setting the
> > compression level to -7, -8, or -9 for better compression.
> >
> > Lee
> >
> >
> > -----Original Message-----
> > From: udpcast-bounces at udpcast.linux.lu
> > [mailto:udpcast-bounces at udpcast.linux.lu] On Behalf Of
> cmonster at icehouse.net
> > Sent: Tuesday, July 27, 2004 4:36 PM
> I am having a problem with the compressed size of the drive being far larger
> than the size that is really used (I.E. 2.5 gigs used but image size of 9 gigs).
> I found a program called sdelete and tried using it to cleanise the unused
> space. But every time I run the udpcast to remake the image after using sdelete
> it is even bigger than before! Any one have any ideas?
> 
> > To: udpcast at udpcast.linux.lu
> > Subject: [Udpcast] Image size bigger that actual space used
> >
> >
> >
> > I have been trying to send an image to my server. The hard drive on the
> > computer
> > that I am sending from is 20 gig with 2.5 used. I turn on lzop compession
> > and
> > send the image to the server. But the image file endes up being 8.2 gigs.
> > Any
> > idea why it would be that big?
> >
> > Thanks again for your help
> > Kevin
> > _______________________________________________
> > Udpcast mailing list
> > Udpcast at udpcast.linux.lu
> > http://udpcast.linux.lu/mailman/listinfo/udpcast
> >
> >
> 
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> 



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