For the System Manager backup operation, note the following:
System Manager backup operation supports a maximum of 4GB file size of the /emdata/svars/ directory. This is approximately 41% of /emdata occupancy, as displayed in the Disk Space Utilization widget on the System Manager web console Home screen.
If you have 250K users and 4GB of svars file size, the backup file size is 5GB.
To process the backup in the /swlibrary directory, you must have three times of backup file size space.
The root partition must have at least 1GB of free space.