FW: Question on SCSI-2

Lohmeyer, John JLOHMEYE at cossymwest.co.symbios.com
Wed Aug 28 10:24:00 PDT 1996


* From the SCSI Reflector (scsi at symbios.com), posted by:
* "Lohmeyer, John" <JLOHMEYE at COSSYMWEST.CO.SYMBIOS.COM>
*

I received the below message forwarded from the X3 Secretariat.  Stefan   
Hallgren is looking for additional medium type codes for 3.5-inch SCSI   
floppies.  Does anyone know the appropriate data to add new medium type   
codes for high-density 3.5-inch floppies?  For reference, I've included   
the SCSI-2 medium type table below:

                 Table 153 - Direct-access medium-type codes
+=======-=================================================================  
====+
|  Code |   
                                                                    |
| value |                        Medium type   
                                 |
|-------+-----------------------------------------------------------------  
 ----|
|  00h  |  Default medium type (currently mounted medium type)   
               |
|  01h  |  Flexible disk, single-sided; unspecified medium   
                   |
|  02h  |  Flexible disk, double-sided; unspecified medium   
                   |
|       |   
                                                                    |
|       |                     Flexible disks   
                                 |
|       |  Diameter    Bit density  Track density  Number     ANSI   
reference  |
|       |  mm (in)     Bits/radian   /mm (/in)     of sides      standard   
    |
|       | ----------  -----------  -------------  --------   
 ----------------  |
|  05h  | 200 (8,0)      6 631        1,9 (48)        1      ANSI   
X3.73-1980  |
|  06h  | 200 (8,0)      6 631        1,9 (48)        2          (Note 1)   
    |
|  09h  | 200 (8,0)     13 262        1,9 (48)        1            None   
      |
|  0Ah  | 200 (8,0)     13 262        1,9 (48)        2      ANSI   
X3.121-1984 |
|  0Dh  | 130 (5,25)     3 979        1,9 (48)        1      ANSI   
X3.82-1980  |
|  12h  | 130 (5,25)     7 958        1,9 (48)        2      ANSI   
X3.125-1985 |
|  16h  | 130 (5,25)     7 958        3,8 (96)        2      ANSI   
X3.126-1986 |
|  1Ah  | 130 (5,25)    13 262        3,8 (96)        2      ISO   
DIS8630-1985 |
|  1Eh  |  90 (3,5)      7 958        5,3 (135)       2        ANSI   
X3.137    |
|       |                                                        (Note 2)   
    |
|       |             Direct-access magnetic yapes   
                           |
|       |  Width               Density      ANSI reference   
                   |
|       |  mm (in)     Tracks  ftpmm (ftpi)    standard   
                      |
|       | ----------  ------  ------------  --------------   
                   |
|  40h  | 6,3 (0,25)    12    394 (10 000)      Note 1   
                       |
|  44h  | 6,3 (0,25)    24    394 (10 000)      Note 1   
                       |
|-------------------------------------------------------------------------  
 ----|
|  Code values 80h - FFh are vendor-specific.  All remaining code values   
     |
|  are reserved.   
                                                             |
|-------------------------------------------------------------------------  
 ----|
|  NOTES   
                                                                     |
|   1  See annex c for additional standards information.   
                     |
|   2  This standard is under development.  Please contact the   
secretariat    |
|      for current information on status and availability.   
                   |
+=========================================================================  
====+

_
To: X3SEC
Cc: stefan at mri.com
From: Stefan Hallgren on Tue, Aug 27, 1996 4:29 PM
Subject: Question on SCSI-2


In the SCSI-2 standard, ducument ANSI X3.131-1994, on
page 195, in Table 153 which lists various Medium Types,
there is only one 3.5" floppy disk type listed.

Where can I find out about what Medium Types to use for
other variations of 3.5" floppy disks ?

Thank you,

Stefan Hallgren,
at
Microtec - A Mentor Graphics Company

stefan at mri.com

 --
John Lohmeyer                 E-Mail: john.lohmeyer at symbios.com
Symbios Logic Inc.             Voice: 719-533-7560
4420 ArrowsWest Dr.              Fax: 719-533-7036
Colo Spgs, CO 80907-3444    SCSI BBS: 719-533-7950 300--14400 baud



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