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Re: How to compare clone of a partition with source partition

Cross-posted to 2 groups.

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Yousuf Khan wrote
> AndyHancock wrote

>> I believe that the concerns about the unknown partition type that I describe in my reply to Mark F apply.  Would you 
>> be able to respond to those?  Much appreciated.

> Well, my experience with disk imaging comes from using Macrium
> Reflect, others are familiar with Acronis True Image, etc. For the
> most part, when imaging is done (rather than normal backup), it's
> because certain files are position dependent. There may only be one4
> or two files in the entire file system that are position dependent
> (usually system boot files), and without some kind of an attribute
> saying a file is position dependent, the image makes all of them
> positional. The actual contents will remain identical whether you use
> traditional backup vs. imaging, but imaging saves the positional information.

It doesnt usually, actually. Essentially because its only possible when
the partition size does not change, and most systems use the one
approach for all cloning unless you specify a bit by bit clone be done,
just because that allows the single approach which works for both
when they partition size changes, and when it doesnt. There is no
point in handling the clone when the size doesnt change specially,
when you also offer a bit by bit clone as an option.

Most modern cloners allow allow compression of the image and file
ops on files in the image, and that isnt possible unless the cloner
understands the file system and doesnt do bit by bit clones by default.

> Now, most imaging these days are "smart" meaning that they don't
> bother copying the contents of empty blocks or clusters, just ones
> with files on them.

Yes, thats the other reason why they dont bother to preserve position.

> When the imager then copies the contents to its archive file, it stores them within its archive in its own internal 
> format. When you mount the image as a virtual disk, it'll get mounted as the format the imager had saved it to. It may 
> be NTFS, or FAT, or something else entire proprietary to the imager. It doesn't matter, the file contents will be 
> identical. Positional information on the other hand would probably require the imager's own restore option to restore.

Most dont even preserve file positions on a restore.

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Thread

How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-14 20:56 -0800
  Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-15 16:18 +1100
    Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-14 21:42 -0800
  Re: How to compare clone of a partition with source partition Arno <me@privacy.net> - 2012-01-15 13:39 +0000
    Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-15 11:43 -0800
      Re: How to compare clone of a partition with source partition Arno <me@privacy.net> - 2012-01-15 20:23 +0000
        Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-15 12:49 -0800
          Re: How to compare clone of a partition with source partition Arno <me@privacy.net> - 2012-01-16 01:18 +0000
            Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-15 20:52 -0800
              Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-16 21:49 -0800
                Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-17 19:50 +1100
                Re: How to compare clone of a partition with source partition Mark F <mark53916@gmail.com> - 2012-01-17 15:27 -0500
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-17 21:30 -0800
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-17 21:19 -0800
                Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-18 17:04 +1100
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-17 22:46 -0800
                Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-18 20:42 +1100
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-18 21:28 -0800
                Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-20 06:27 +1100
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-19 21:07 -0800
    Re: How to compare clone of a partition with source partition Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-17 04:00 -0500
      Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-17 21:33 -0800
        Re: How to compare clone of a partition with source partition Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-19 11:37 -0500
          Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-20 06:34 +1100
          Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-19 21:17 -0800
            Re: How to compare clone of a partition with source partition Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2012-01-25 10:53 -0500
              Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-26 06:16 +1100
          Re: How to compare clone of a partition with source partition willbill <postonNG@postonNG.net> - 2012-01-20 12:52 -0600
            Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-21 08:49 +1100
              Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-22 21:29 -0800
                Re: How to compare clone of a partition with source partition "Rod Speed" <rod.speed.aaa@gmail.com> - 2012-01-24 05:32 +1100
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-24 17:54 -0800
                Re: How to compare clone of a partition with source partition willbill <postonNG@postonNG.net> - 2012-01-24 12:22 -0600
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-24 18:05 -0800
                Re: How to compare clone of a partition with source partition AndyHancock <andymhancock@gmail.com> - 2012-01-24 18:57 -0800

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