OSX psutil.disk_usage confusion

macOS mojave 10.14: Python 3.6.5 psutil 5.4.8

When using psutil.disk_usage i get the following from a network SMB mount to Synology NAS:

>>> psutil.disk_usage('/Volumes/music')
sdiskusage(total=1348853272576, used=-2783315886080, free=4132169158656, percent=-206.3)

The df gives the following for the same mount:

//xxxxxx@SYNOSERVER._smb._tcp.local/music    11224413640 3154137584 8070276056    29% 1577068790          4035138028   28%   /Volumes/music

As you can see, psutil is giving “-206.3 %” whereas it should be “28%”. Is this a known bug??

[roachcord3]

I know this is an old thread but I discovered this issue independently. There is a 32-bit overflow on the statvfs syscall on MacOS specifically. It can be worked around by using a different syscall. There’s an open issue tracked on Python itself for this, but I think technically psutil can do something about it, @giampaolo. The bug reporter has their own workaround they linked in the thread: https://github.com/sabnzbd/sabnzbd/blob/bdf7df9ecd10d600216072bae7e0da6fffb78b95/sabnzbd/filesystem.py#L961-L1005

[roachcord3]

@giampaolo never mind the bit about the negative number, I forgot that #2152 was recent enough to have not been in the release by the time I made my comment, but it has since been released, and after upgrading psutil I no longer get a negative number, however I do get inaccurate info regardless so I will open a new issue.