SUMMARY: Changing SCSI-id on a 'Shoe-box'.

From: Stefan Frick (etxstfr@helix.ericsson.se)
Date: Wed May 05 1993 - 08:50:30 CDT


Original question:

> How do I change the id-number of the disk/tape in an old shoe-box?
> I've looked into to the box and there are some dip-switches and jumpers
> on the different cards, but which is which?
>

A number of people were kind enough to give me a quick solution and the replies
are still coming...

All replies were pretty much the same, so I'll just include the best (IMHO) of them.

--------------------------------------------------------------------------

                 EMULEX MD 21 ESDI to SCSI BRIDGE CONTROLLER

The following is from the MD21/S2 DISK CONTROLLER TECHNICAL MANUAL, Part No.
MD2151003-00 Rev E, March, 1988, available from Emulex at 1-800-854-7112 for
approximately $25. They do not operate a BBS.

        * 32k byte on board RAM buffer, about 14k byte for each lun
        * 8031 CPU at 12 Mhz, 32k Prom
        * transfer rate up to 15 Mbps at ESDI interface
        * supports SCSI disconnect/connect option
        * transfer rate up to 1.25 Mbytes/sec at SCSI interface (burst rate)
        * supports SCSI bus parity
        * takes one or two ESDI drives
        * MTBF 42425 hours
        * Power +5 VDC, 1.5 A nominal

CONFIGURATION

        SW1-1 SCSI ID LSB (1)
        SW1-2 SCSI ID (2)
        SW1-3 SCSI ID MSB (4)
        SW1-4 not used
        SW1-5 physical sector size 0= 512 bytes
                                        1= 256 bytes
        SW1-6 Disable Drive Spinup 0= drives are automatically spun up
                                        1= drives are not spun up automatically
        SW1-7 Disable Soft Error 0= errors reported
                Reporting 1= errors not reported
        SW1-8 SCSI Bus Parity Enable 0= Parity Check disabled
                                        1= Parity Check enabled

CONNECTORS:

        J1 ESDI control cable, 34 wire, max 10 feet
        J2 ESDI data cable, 20 wire, lun 1, max 10 feet
        J3 ESDI data cable, 20 wire, lun 0, max 10 feet
        J4 user panel connector
        J5 testing
        J6 SCSI
        J7 power

        U22 SCSI terminator socket
        U35 SCSI terminator socket

EXTERNAL TERMINATOR OPTION:

Install diode 1N5817 at CR2 and connect wire wrap jumper E to F. This will
supply pin 26 with termination power. (Caution, this can cause shorts!)

LEDs:
        RED GREEN
        --- -----
        OFF OFF Hardware reset Test
        OFF ON 8031 Test
                        PROM Checksum Test
                        Buffer Controller Test
                        Dynamic Ram Test
        ON OFF Disk Formatter Test
                        SCSI Controller Test
        ON ON Self-Test Passed

-------------------- begin enclosure #2

                       EMULEX MT-02 SCSI SETUP
                       (as used on Sun Systems)

Given the component-side-up card orientation per:

         +-------------------------------------+
         | [SW1] [:] Power connector
        [:] |
  Tape [:] [:]
  Data [:] [:] SCSI connector
  Conn. [:] [:]
        [:] |
         +-------------------------------------+

SW1 has 8 switches per [1 2 3 4 5 6 7 8] whose functions are:

        SW1-1,SW1-2,SW1-3 are SCSI ID weighted 1,2,4 (note this ranking!)

                Thus: SW1-3 SW1-2 SW1-1 SCSI ID

                        0 0 0 0
                        0 0 1 1
                        0 1 0 2
                        0 1 1 3
                        1 0 0 4
                        1 0 1 5
                        1 1 0 6
                        1 1 1 7

        SW1-4 is NOT used for anything

        SW1-5,SW1-6,SW1-7 determine the tape drive type per:

                Thus: SW1-7 SW1-6 SW1-5 Drive

                        0 0 0 Cipher QIC-36
                        0 0 1 Archive Scorpion (QIC-24, 60MB)
                        0 1 0 Wangtek series 5000 basic
                        0 1 1 Wangtek series 5000E
                        1 0 0 Kennedy 6500
                        1 0 1 ???
                        1 1 0 ???
                        1 1 1 ???

        SW1-8 SCSI bus parity checking, ON to enable (factory default)

And note that per the controller docs, OFF(0)=OPEN, ON(1)=CLOSED (since they
use two different style DIP switch assemblies).

--------------------------------------------------------------------------

        I have this info... Here you go:

        ---------------------------------------------
        | Switch | SCSI Addr |
        | SW1-3 SW1-2 SW1-1 | |
        ---------------------------------------------
        | 0 0 0 | 00 |
        | 0 0 1 | 01 |
        | 0 1 0 | 02 |
        | 0 1 1 | 03 |
        | 1 0 0 | 04 |
        | 1 0 1 | 05 |
        | 1 1 0 | 06 |
        | 1 1 1 | 07 |
         -------------------------------------------
These setting apply to BOTH the "MD21" and "MT21"
(one is for "D"isk the other for "T"ape.)

        Here is other info for these controllers:

        
MD21:

        SW1-5
        -----
        SECTOR SIZE
                <512 bytes> [DOWN] {DEFAULT}
                <256 bytes> [UP]

        SW1-6
        -----
        DISABLE DRIVE SPINUP
                <auto spinup> [DOWN] {DEFAULT}
                <no spinup> [UP]

        SW1-7
        -----
        SOFT ERROR REPORTING
                <soft error reported> [DOWN] {DEFAULT}
                <soft errors NOT rep> [UP]

        SW1-8
        -----
        SCSI BUS PARITY
                <check disabled> [DOWN] {DEFAULT}
                <check enabled> [UP]

MT21:

        DRIVE TYPE:

        -------------------------------------------------
        |SW1-7 SW1-6 SW1-5 | TYPE | TACH RATE |
        -------------------------------------------------
        | 0 0 0 | Cipher | 122 mils |
        | | (QIC-36) | |
        | | | |
        | 0 0 1 | Archive | 193 mils |
        | | Scorpion | |
        | | | |
        | 0 1 0 | Wangtek | 145 mils |
        | | (5000) | |
        | | | |
        | 0 1 1 | Wangtek | 145 mils |
        | | (5000E) | |
        | | | |
        | 1 0 0 | Kennedy | 145 mils |
        | | (6500) | |
        | | | |
        | 1 1 0 | Not Used | |
        | | | |
        | 1 1 1 | Not Used | |
        -------------------------------------------------

        SW1-8
        -----
        [same as MD21]

---------------------------------------------------------

Thanks to:

rug@basis.ffi.no (Rune Groenaas)
william.griffith@cyrix.com (William Griffith)
valdes@geosun.uchicago.edu (John Valdes)
heas@chpc.org (John Heasley) [ Thanks for the fax! ]
ups!kalli!kevin@fourx.Aus.Sun.COM ((Kevin Sheehan)
davidl@Newbridge.COM (David Law)
cc_gucky@rcvie.co.at (Gerhard Holzer) [ Thanks for the fax! ]
weingart@inf.ethz.ch (Tobias Weingartner)
hoel@cec.mtu.edu (Jim Hoel)
khomo@ranger.rtsg.mot.com (Malome T. Khomo)
matt@wbst845e.xerox.com (Matt Goheen)
geertj@ica.philips.nl (Geert Jan)
pasken@newton.slu.edu (Robert Pasken)
Jason.Hargis@PII.COM (Jason Hargis)
crm@reston.eri.com (Charles Mengel)



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