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Date: Sat, 15 Feb 2025 11:17:38 +0100
To: cygwin AT cygwin DOT com
Subject: Re: /bin/cp of sparse files broken in
 3.6.0-0.362.g68c13dc92f65.x86_64?
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From: Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
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On Feb 15 08:34, Cedric Blancher via Cygwin wrote:
> On Thu, 13 Feb 2025 at 15:36, Corinna Vinschen via Cygwin
> <cygwin AT cygwin DOT com> wrote:
> >
> > On Feb 13 09:02, Corinna Vinschen via Cygwin wrote:
> > > This:
> > >
> > > > - Cygwin mount has "sparse" option (mount Y: -o sparse,exec /cygdrive/y)
> > >
> > > doesn't work:
> > >
> > >   $ cat /etc/fstab
> > >   Y: /mnt/y binary,posix=0,sparse 0 0
> >
> > Copy/Paste rulez again. That should have been
> >
> >     Y: /mnt/y ntfs binary,posix=0,sparse 0 0
> 
> 1, Could you please make an easy to understand (e.g. we french frog
> eaters are not that smart) guide how to mount drive E: with sparse
> enabled?
> 2. Instructions how to make all /cygdrive/ mounts,

The User's Guide contains a description and examples explaing how to do
that:

https://cygwin.com/cygwin-ug-net/using.html#cygdrive

> or just /cygdrive/c
> sparse enabled would be helpful

Just don't use the cygdrive prefix but create an explicit mount for
that.

Again this is explained with example in the User's Guide.
https://cygwin.com/cygwin-ug-net/using.html#cygdrive
(reading time ca. 5 mins)

in conjunction with the chapter explaining the mount table
https://cygwin.com/cygwin-ug-net/using.html#mount-table
(reading time ca. 15 mins), also containing examples.


Corinna

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