Disabling User Account Control
On Windows Server 2008 nodes, you must disable User Account Control (UAC) for GPFS™ to operate correctly. UAC needs to be disabled for the entire system, not just turned off for GPFS administrative users.
However, if UAC is enabled, some GPFS functions may not work properly. Therefore, it is recommended that UAC be disabled, regardless of the Windows OS version. On the systems with UAC enabled, GPFS administrative users run in Admin Mode such as when a program is started with the Run as Administrator option.
To disable UAC on Windows systems,
follow these steps:
- Open the System Configuration application under Administrative Tools.
- Select the Tools tab and scroll down to select Disable UAC.
- Click Launch.
Note: This change requires a reboot.
Limitations: Windows is
responsible for providing file ownership information to GPFS. If UAC is disabled, the default ownership
of files may be affected. Files from users who are members of an administrative
group will be owned by the administrative group, but files from users
without administrative membership will be mapped to their user ID.
This restriction is documented on the Microsoft Support website.