Disk Director has started having trouble when starting up reading the sectors of one of my removable drives, throwing up innumerable errors. It then reports that this drive has no file system present in any of its partitions and there are no drive letters. Windows Disk Management reports the drive in question to be healthy with corrrect drive letters and NTFS. I have no problem in using this drive with any other program, it is only Disk Director which is having problems with it. A week ago it wasn't having problems. What has happened?