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Date: Sat, 4 Apr 2015 21:52:18 +0300
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: cygwin AT cygwin DOT com
Message-ID: <9784082.20150404215218@yandex.ru>
To: Eric Pement <eric DOT pement AT gmail DOT com>, cygwin AT cygwin DOT com
Subject: Re: Can I move Cygwin and Cygwin64 to a drive other than C: ?
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Greetings, Eric Pement!

> Follow-up question for Corinna or anyone who might know the answer:

>> >On Apr  1 03:26, Robert Miles wrote:
>> > >>Can I move the entire Cygwin and Cygwin64 directory trees to one
>> > >>of the nearly empty drives, without losing the extra packages I've
>> > >>already downloaded and the files I've created?
>> > >
>> > >Robocopy allows to copy an entire Cygwin tree while keeping all
>> > >permissions intact.  I had good luck with something along the
>> > >lines of
>> > >
>> > >   robocopy C:\cygwin64 D:\cygwin64 /e /purge /z /copyall /sl
> . . .
> With an added comment that
>> I *did* move Cygwin installations using
>> robocopy and the above works for me.  In an elevated shell.

> I recently needed to move a Cygwin installation, about 6 GB, to
> another drive accessible only on a network file system. Due to the
> number of files, copying everything would have taken a week or more,
> because everything slows down when the number of files increases.

> The solution I ultimately took was not the best. I compressed
> everything into a single *.7z (7-zip) archive, moved the single
> archive across the network, and uncompressed the *.7z archive on the
> target machine.

> Although the total time was much, much faster (maybe 5 or 6 hours,
> including 30 minutes to uncompress the archive), all my file
> permissions were set to the same value, regardless of what they had
> been previously, and any extended attributes were lost entirely.

> I didn't like it, but I had no realistic alternative.

> For future resource, what is the best way to archive a Cygwin
> installation into a single file, which will preserve all file
> properties and permissions, so that the archive can be transferred to
> another location? (For the sake of clarity, presume that Cygwin does
> NOT exist in the target location, so a non-Cygwin tool must be used to
> expand the archive.)

About any sane modern archiving tool can read TAR archives.
And most of them understand gz/xz/bz2 compression.
You could have used any of that to unpack Cygwin to get a bootstrap
environment, then use that environment to unpack the tar with all permisisons
restored.
Alternatively, RAR can add/restore access data.


-- 
With best regards,
Andrey Repin
Saturday, April 4, 2015 21:48:51

Sorry for my terrible english...


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