dtype(C)

dtype(C)
dtype -- determine disk type

Syntax

dtype [-s] device ...

Description

The dtype command determines the type of a disk and prints pertinent information on the standard output (unless the silent (-s) option is selected), then exits with a corresponding value (see below). When more than one argument is given for device, the exit value corresponds to the last argument.

Miscellaneous disk types

 -------------------------------------------------------
 Exit value   Message (optional)
 -------------------------------------------------------
     60       error (specified)
     61       empty or unrecognized data

Storage disk types

 ------------------------------------------------------
 Exit code   Message (optional)
 ------------------------------------------------------
    70       backup format, volume n
    71       tar format [, extent e of n]
    72       cpio format (binary) format
    73       cpio character (-Hodc) format
    74       cpio character (-c) format
    75       cpio character (-Hcrc) format

XENIX or UNIX disk types

 ---------------------------------------------------------
 Version      Exit     Message
 or type      code     (optional)
 ---------------------------------------------------------
 System III   120      XENIX 2.x filesystem [needs
                       cleaning]
 ---------------------------------------------------------
 System V     130      XENIX 3.x or later filesystem
                       [needs cleaning]
              138      DTFS filesystem [needs cleaning]
              139      HTFS filesystem [needs cleaning]
              140      UNIX 1K filesystem [needs cleaning]

MS-DOS disk types

 ------------------------------------------------------
 Version   Exit     Message
 or type   code     (optional)
 ------------------------------------------------------
 1.x        80      DOS 1.x, 8 sec/track, single sided
            81      DOS 1.x, 8 sec/track, dual sided
 ------------------------------------------------------
 2.x        90      MS-DOS 8 sec/track, 40 tracks/side,
                    single sided, 5.25 inch
            91      MS-DOS 8 sec/track, 40 tracks/side,
                    dual sided, 5.25 inch
            92      MS-DOS 9 sec/track, 40 tracks/side,
                    single sided, 5.25 inch
            93      MS-DOS 9 sec/track, 40 tracks/side,
                    dual sided, 5.25 inch
            94      MS-DOS fixed disk
 ------------------------------------------------------
 data      100      MS-DOS data disk, n sec/track,
                    single sided
           101      MS-DOS data disk, n sec/track, dual
                    sided
           102      MS-DOS data disk, 9 sec/track,
                    single sided
           103      MS-DOS data disk, 9 sec/track, dual
                    sided
 ------------------------------------------------------
 3.x       110      MS-DOS 9 (3.5 inch) or 15 (5.25
                    inch) sec/track, 80 tracks/side,
                    dual sided
           111      MS-DOS 18 sec/track, 80
                    tracks/side, dual sided, 3.5 inch
           112      MS-DOS 8 sec/track, 80 tracks/side,
                    single sided, 3.5 or 5.25 inch
           113      MS-DOS 8 sec/track, 80 tracks/side,
                    dual sided, 3.5 or 5.25 inch

Limitations

XENIX filesystems and backup and cpio binary formats may not be recognized if created on a foreign system. This is due to such system differences as byte and word swapping and structure alignment. (``word-swapped'' refers to byte ordering of long words in relation to the host system.)

This utility only works reliably for floppy diskettes.

See also

backup(ADM), cpio(C), tar(C)

Standards conformance

dtype is not part of any currently supported standard; it is an extension of AT&T System V provided by The Santa Cruz Operation, Inc.

SCO OpenServer Release 5.0.6 -- 1 August 2000