drive error reading FAT sector sector, attempting retry Facility: EFI$CP, The OpenVMS EFI Partition Control Program Explanation: this message reports a device error reading the File Allocation Table (FAT). This is ominous. If multiple copies of the FAT are present, there will be an attempt to read the required FAT data from the same sector within an another copy of the FAT. User Action: Attempt to copy all user data off the FAT volume, as it appears the FAT volume is failing.