fsDataTooBigErr - file or volume is too big for system

fileBoundsErr - file's EOF, offset, mark or size is too big

notARemountErr - when _Mount allows only remounts and doesn't get one

badFidErr - file id is dangling or doesn't match with the file number

sameFileErr - can't exchange a file with itself

desktopDamagedErr - desktop database files are corrupted

catChangedErr - the catalog has been modified

diffVolErr - files on different volumes

notAFileErr - directory specified

fidExists - file id already exists

fidNotFound - no file thread exists.