invalid or corrupt target BIOS Parameter Block detected Facility: EFI$CP, The OpenVMS EFI Partition Control Program Explanation: A series of verification operations is performed to detect faulty or corrupted BIOS Parameter Block (BPB) structure. (The BPB is a critical system data structure for the FAT volume structure.) This message indicates that one or more of the verifications has failed, and that the target FAT partition is apparently corrupted, or that the target partition structure is not a valid FAT partition. User Action: Verify that the target volume or target partition is consistent and uncorrupted, and particularly that the FAT partition is correct using the SHOW BPB command or another volume structure verification utility. If the volume partition is valid, please contact the customer support center. Consider restoration from archives or a data recovery service, and reinitialization of the FAT volume or FAT partition.