Disk imaging program?

Niles Rogoff nilesrogoff at gmail.com
Wed Jun 25 19:36:53 UTC 2014

>tar would be unable to correctly save the permissions on those files

I should clarify that this only applies to NTFS partitions.

On Wed, Jun 25, 2014 at 3:35 PM, Niles Rogoff <nilesrogoff at gmail.com> wrote:

> He's saying if you, instead of copying sector by sector, decided put all
> the files into a tar file, then tar would be unable to correctly save the
> permissions on those files.
> This would be in place of dd, and would not be able to copy the boot
> sector of a device or partition
> On Wed, Jun 25, 2014 at 2:04 PM, John Hupp <ubuntu at prpcompany.com> wrote:
>> On 6/25/2014 1:12 PM, Nils Kassube wrote:
>>> John Hupp wrote:
>>>> And point well taken: it does seem to me that, as a refinement of the
>>>> initial suggested plan, gzip alone should suffice since we are dealing
>>>> with a single-file output from dd and not a collection of files.
>>> Well, you could use a command chain dd | gzip | tar to split the output
>>> for several DVDs including a prompt for the next medium.
>>> BTW: If you want to save data only, you shouldn't use tar for ntfs
>>> partitions because tar doesn't know about the ntfs permissions which
>>> different from the Unix permissions.
>>> Nils
>> Tar must do some processing of its source contents then?  The original
>> suggestion for using dd in this thread came from Niles Rogoff, and his
>> prescription was to use usplit.  I don't know that this command is native
>> to Ubuntu, but I believe split is.  And if split merely does that, then it
>> seems like ntfs or unix permissions should be preserved.  Agree?
>> And I think I still have this question lingering: Does dd knows how to
>> prompt for the next DVD (the next split) during a restore operation?
>> --
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