The command: snapdrive storage list -all

The error message displayed to the user: Status call to SDU daemon failed

The error hidden in the Snapdrive trace log: Fatal error: Assertion detected in production code: ../sbl/StorageOperation.cpp:182: Test ‘osAssistants.size() == 1′ failed

The actual problem: /etc/redhat-release contains the string CentOS not Red Hat.