Acronis Backup: Backup fails on a system with SoftRaid

Symptoms

1. You back up a macOS system with RAID set up using SoftRaid
2. If external USB drive is attached to the system, backup fails with the following error:

   Selected volumes were not found: RAID 5

Cause

SoftRaid is currently not supported by Acronis Backup products. Correct functionality on systems with SoftRaid is not guaranteed.