Encryption of SCSI hard disks is not supported. If you target a SCSI hard disk for encryption, the device becomes unbootable. To recover the device, you must use a use a bootable operating system CD (or Windows PE or Bart PE) to delete the ZENworks (NAC) partition created when the policy was applied.
If possible, you should disable or uninstall the Full Disk Encryption Agent on devices with SCSI hard disks. For instructions, see ZENworks 11 SP2 Full Disk Encryption Agent Reference.