[Windows] disk_partitions(all=True) only returns mountpoints on drives where it first finds one

[ian28223]

Platform

• detected on Windows Server 2019 but may not be isolated to that version
• psutil 5.6.3

Bug description

Somewhat related to #1192
Above works but once it finds a mountpoint on a drive letter, it will not look for mountpoints on next drive letters.

Example:
Given 3 drive letters, C:, D:, Z:.

• case 1: mountpoints on C, D and Z

  • mount C:/mnt1/ - detected/returned by psutil
  • mount C:/mnt2/ - detected/returned by psutil
  • mount D:/mnt3/ - not returned
  • mount Z:/mnt4/ - not returned

• case 2: no mount points on C:

  • mounts in C:/ - none
  • mount D:/mnt3/ - detected/returned by psutil
  • mount Z:/mnt4/ - not returned

Expectation is that all mountpoints from all drives are returned.

traceback message (if any)

import psutil
psutil.disk_partitions(all=True)

[rankaiyx]

#1776
I meet the same trouble

[ajdurr]

Same issue I am seeing

[rankaiyx]

Same issue I am seeing
You can try this the cmd command:
diskperf -y

[ajdurr]

I reviewed #1776 and it does not appear related to this one.