Appendix F

Additional Medium Type and Density Code Standards

In sections 8 and 9 of this standard, the MODE SELECT and MODE SENSE commands 
define medium type codes and density codes for certain flexible disks and 
magnetic tapes.  ANSI standards or X3 draft documents are referenced for code 
values if a standard or draft document exists for that code value.  In many 
cases, other standards also exist for a code value.  Tables F1 and F2 in this 
appendix provide references to those standards for these code values.

DISCLAIMER:  It is not the purpose of this appendix to indicate that these 
standards are exactly equivalent to each other.  However, these standards may 
be applicable.  Please refer to sections 8 and 9 for additional information 
concerning the medium type or density code.


                                 Table F1
                       Direct-access Medium Type Codes

==============================================================================
Code Value                       Medium Type
----------  ------------------------------------------------------------------
 00H-02H    See section 8.
                   
            Flexible Disk Reference Standard(s)
            ------------------------------------------------------------------
   05H      X3.73-1980,  ECMA-54,  ISO 5654/1-1984, ISO 5654/2-1982
   06H      X3B8-140,    ECMA-59
   09H      X3B8/78-139
   0AH      X3.121-1984, ECMA-69,  ISO 7065/1-1985, ISO 7065/2-1985
   0DH      X3.82-1980,  ECMA-66,  ISO 6596/1-1985, ISO 6596/2-1985
   12H      X3.125-1984, ECMA-70,  ISO 7487/1-1985, ISO 7487/2-1985,
                                   ISO 7487/3-1985
   16H      X3.126-198X, ECMA-78,  DIS 8378/1,      DIS 8378/2,     DIS 8378/3
   1AH      X3B8/85-199, ECMA-99,  DIS 8630/1,      DIS 8630/2
   1EH      X3.137-198X, ECMA-100, DIS 8860/1,      DIS 8860/2

            Direct-access Magnetic Tape Standard(s)
            ------------------------------------------------------------------
   40H      X3B5/85-138 (Note 1),  ECMA TC19/83/39
   44H      X3B5/85-138 (Note 1),  ECMA TC19/83/39

80H _ FFH   Vendor unique
All others  Reserved
==============================================================================
NOTE:
  (1)  The referenced standard is for unrecorded miniature cartridge media.  
The usage referred to here is for serial GCR recording using a format known as 
QIC-100.  Since X3B5 issues a new document number for each revision of their 
working draft document, please contact the Chairman of X3B5 for the latest 
document number.



                                 Table F2
                       Sequential-access Density Codes

==============================================================================
Code Value                             Density
----------  ------------------------------------------------------------------
   00H      See section 9.

            Magnetic Tape Reference Standard(s)
            ------------------------------------------------------------------
   01H      X3.22-1983,                 ECMA-62
   02H      X3.39-1973                  ECMA-62
   03H      X3.54-1976,                 ECMA-62
   04H      Old format known as QIC-11
   05H      X3.136-198X,                ECMA-98
   06H      X3B5/85-98 (Note 1)
   07H      X3.116-198X,                ECMA-79
   08H      X3B5/85-77 (Note 1)
   09H      X3B5/85-76 (Note 1)
   0AH
   0BH      X3.55, X3.56-198X,          ECMA-46, ISO 4057-1979

80H _ FFH   Vendor unique
All others  Reserved
==============================================================================
NOTES:
  (1)  Working Draft.  X3B5 assigns a new document number to each revision of 
their documents.  Please contact the Chairman of X3B5 for the latest document 
number.


























