[Fedora-livecd-list] understanding about function "create_image_minimizer"

[Gareth]

Hi, all
I'm confused about the progress of this function. Actually in its steps:


      1) Create a sparse COW
      2) Loopback mount the image and the COW
      3) Create a device-mapper snapshot of the image
         using the COW
      4) Resize the filesystem to the minimal size
      5) Determine the amount of space used in the COW
      6) Restroy the device-mapper snapshot
      7) Truncate the COW, removing unused space
      8) Create a squashfs of the COW


why not resize2fs -M osmin.img directly?

In document http://fedoraproject.org/wiki/LiveOS_image,
it said"osmin.img is a minimized OS image which is used to aid traditional
installation from a LiveOS image source to a hard disk.", but how does this
lvm snapshot help with installation to disk?

Is "os.fturncate this file(snapshot file *osmin*)" dangerously?

Thanks
-- 
Gareth

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