When disaster recovery gets configured on the secondary site, the catalog storage usage may be displayed as zero

During the configuration of disaster recovery on the secondary site, the catalog storage usage may get displayed initially. But later, the catalog storage usage does not get displayed. This happens because the primary file system remains offline on the secondary site. (IA-30046)

Workaround:

No workaround is required. After the disaster recovery configuration is complete and the secondary site becomes the primary, the catalog storage usage gets displayed correctly.