 On such partitions, CHS-related geometry entries, namely the CHS sector addresses in the MBR as well as the number of sectors per track and the number of heads in the EBPB record, may contain no or misleading values and should not be used.OS/2 heavily depends on extended attributes (EAs) and stores them in a hidden file called "codice_9" in the root directory of the FAT12 or FAT16 volume.This file is indexed by two previously reserved bytes in the file's (or directory's) directory entry at offset 0x14.