files can be aligned with DFU DEFRAGMENT /LBN=lbn Facility: EFI$CP, The OpenVMS EFI Partition Control Program Explanation: This message provides a command which can align a disk file onto a particular disk logical block number (LBN). User Action: This message is normally associated with another error. Please resolve the primary error. The DFU utility installation kit is available on various OpenVMS Freeware distributions.