Disk Space calculation error during DX NetOps Performance Management install

Products

• CA Infrastructure Management
• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

This error is seen when running the NetOps Portal installation for DX NetOps Performance Management.

Sample text from screen output.

Not Enough Disk Space
---------------------
Warning!

This installation requires 2,456.87 MB of free disk space, but there are only 514.48 MB available at:

/opt

Please free at least 1,942.39 MB to proceed with the installation.

OR

Warning!
This installation requires 2,581.48 MB of free disk space, but there are only 
1,963.43 MB available at:
   /opt/CA

PRESS TO RECALCULATE AVAILABLE DISK SPACE, OR TYPE 'QUIT' TO EXIT THE INSTALLER:  

Environment

All supported DX NetOps Performance Management releases

Cause

In some OS versions the OS routine to check the space does not pickup the correct free disk space if the destination directory is a mount point.

This can be seen for all DX NetOps Performance Management environment components.

Resolution

Use the -DCHECK_DISK_SPACE=OFF switch when executing the installer will bypass the space check.

For example on a Data Aggregator we would run:

./installDA.bin -DCHECK_DISK_SPACE=OFF

On the NetOps Portal we would run:

./CAPerfCenterSetup.bin -DCHECK_DISK_SPACE=OFF

Additional Information

This is resolved in versions 20.2.4 and higher

But the  DCHECK_DISK_SPACE=OFF option is still available