Windows explorer does not display free space correctly if more than few hundred TB

[Jeremy Allison]

On Tue, May 13, 2014 at 04:37:53AM -0700, Richard Sharpe wrote:
> On Tue, May 13, 2014 at 2:54 AM, Richard Sharpe
> <realrichardsharpe at gmail.com> wrote:
> > Hi folks,
> >
> > We are seeing some interesting behavior when there is lots of free space.
> >
> > Windows explorer does not display the free space when there is more
> > than a few hundred TB (although we do not exactly when this starts, we
> > know it hits with 900TB.)
> >
> > It does not seem to occur with the command prompt. It seems to happen
> > with Windows 7, Server 2008 and Windows 8 and Server 2012.
> >
> > Has anyone seen this.
> 
> This shows the output from the dir command:
> 
> Z:\>dir
>  Volume in drive Z is dept
>  Volume Serial Number is 7DA6-7404
> 
>  Directory of Z:\
> 
> 06/15/2013  02:24 AM    <DIR>          .
> 06/27/2013  01:48 AM    <DIR>          ..
> 01/17/2014  11:01 PM    <DIR>          SW
> 03/18/2014  09:42 PM    <DIR>          QA
>                0 File(s)              0 bytes
>                4 Dir(s)  1,009,809,938,155,520 bytes free

Hmmm. I think that's why we have the 'dfree command'
option in smb.conf so we can lie here when we need
to :-).