SUMMARY> Internal Maxtor 207Mb

From: Simon-Bernard Drolet (droletb@CCG.RNCan.gc.ca)
Date: Thu Jan 26 1995 - 06:59:15 CST


Here is my original request:
>
> Hi you all,
>
> I'm trying to add a Maxtor 207Mb disk in Sparc 2.
>
> The Sparc has already one Maxtor internal disk.
> With one disk, everyting works fine, when I had the other
> disk, the system tell me that the SCSI BUS is HUNG!
>
> Is there a dip switch somewhere on the disk that I should
> change to change the SCSI id of the second disk?
>
> Thanks.
>

  Thanks to
        frode@read-well.no (Frode Stromsvag)
        rbouli01@eng.eds.com
        jim@biz.trib.com (Jim Overeem 571)
        Tom Orban <orban@advtech.uswest.com>

  who all directed me to the right solution. Thnaks specially to

        jerry.springer@valcom.com (Jerry Springer)

  who wrote me a clear solution to my problem.

  Here is his answer:

>Simon-Bernard,
>There are jumpers (not dip switches) on the underside of the disk drive.
>If you turn it over with the power and data connectors oriented at the bottom
>(with the power on the left) the jumper pins will be right above the power
>connector. The lower two sets are for parity and telling the disk when to initially
>spin up. Do not change those. THe three sets of pins above those are for SCSI
>addressing. The pins are "weighted" as 1,2,and 4. The top pin (A0) is 1. Below that
>(A1) is 2. And the third from the top (A3) is 4. Your first disk drive will be set
>to SCSI ID 3. Chances are this new drive is also set that way. If it is there will
>be a little black jumper on the A0 and A1 pins (1 + 2 = 3). The most common thing is
>to set the new drive to SCSI ID 1(making it sd1 if you are running SunOS4.whatever)
>To make it SCSI ID 1 simply remove the jumper on the A1 pins.
>Here is a little diagram of the bottom of the drive. It might be helpful.
>
> ----------------------
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | A0|o o| |
> | A1|o o| |
> | A2|o o| |
> | WS|o o| TERMINATORS|
> | EP|o o| --- --- ---|
> -----------------------
> |POWER| | DATA |
> ------- -------------
>Remember EP is the parity jumper,WS is the spin jumper, and A0-A2 are the SCSI ID
>A0,A1,A2 Jumper OUT scsi id 0
>A0 Jumper IN scsi id 1
>A1 Jumper IN scsi id 2
>A0,A1 Jumper IN scsi id 3
>
>Disks usually only use scsi ids 0-3 but can be set to 4,5,or 6 (don't use 7 it is
>reserved for the scsi bus itself) But using these other id's would require a
>kernel config change and rebuild. Try to stay away from that.
>
>Good Luck
>
>Jerry Springer Phone: (516) 746-7777 Ext. 167
>Ergonomics Group/ValCom Fax: (516) 741-0145
>191 Herricks Rd. Internal Email:springer@ergo
>Garden City Park,NY 11040-5236 External Email:jerry.springer@valcom.com
>

-- 
Simon-Bernard Drolet                E-mail: bernard.drolet@CCG.RNCan.gc.ca
Administrateur de systemes Unix     Tel:    (819) 564-5600 ext.4819
Centre Canadien de Geomatique       Fax:    (819) 564-5698
2144 King Ouest, suite 010, Sherbrooke, Quebec, Canada, J1J 2E8



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