From: bhv@areaplg2.corp.mot.com (Bronis Vidugiris)
Subject: Re: 2 IDE drives
Organization: Motorola, CCR&D, CORP, Schaumburg, IL
Date: Tue, 12 Jan 1993 15:56:36 GMT
Keywords: IDE

In article <1993Jan11.213828.29999@njitgw.njit.edu> dic5340@hertz.njit.edu (David Charlap) writes:
)In article <1993Jan11.185058.24877@samba.oit.unc.edu> Mary.Evans@launchpad.unc.edu (Mary Evans) writes:
)>In article <1993Jan10.233306.8869@sed.stel.com> jon@sed.stel.com (Jon Radel) writes:
)>>If anyone is e-mailing the answer to this, and related "how do I get 
)>>2 IDE drives to run off of the same controller" questions, please
)>>post them too!  I have two IDE drives, both of which will run on my
)>>controller by itself, but when I hook both up the machine hangs.  There
)>>aren't any obvious settings to change except in the CMOS.
)
)Simple.  Your boot disk should have a jumper on it set to the "master"
)position.  Your other disk should have a jumper set to the "slave"
)position.  They might not be marked as such.  Consult your drive's
)docs or contact the manufacturer.  I know that Seagate has an
)automated information service on their phone number - just key in the
)drive model (from a touch-tone phone) and listen for all the specs on
)it.  Once you set the jumpers, you're done.
)
)Don't assume that your old drive is already a "master" drive.  Some
)drives have a third jumper position for "stand-alone" operation.  Your
)new drive will almost certainly NOT be in the slave position.

I believe the jumper configuration is stranger than that.  According to
the docs I got from seagate (they're from the BBS, hard to read, but I
think I got them right), the master drive should have master+slave jumpers,
and the slave drive should have *no* jumpers.  [Interpretation guide -
the thing that looks like a D is really a _, and the thing that looks like
a 3 is really a |.]  I.e. master has 3-4 short AND 5-6 short, slave
has no short, 1 drive has 3-4 short only.

----
ST-1144A and ST-1144A-32

     MMMPWAMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
                          Z....................?    /DDDDDDDDD\
                           ...................1     3 O O O O 3
       1 o o 2  DDDDDDDD?       @ Cable Connector   @D5DGDGD12Y
       3 o o 4  DDDDDD? 3
       5 o o 6  DDDD? 3 3
       7 o o 8  DD? 3 3 3
       9 o o 10 ? 3 3 3 3                               1=closed 0=open
                3 3 3 3 @DD Life-Test (Factory use)
                3 3 3 @DDDD Master on (Slave off) DDDD  1  1  0
                3 3 @DDDDDD Slave Present DDDDDDDDDDDD  0  1  0
                3 @DDDDDDDD Reserved
                @DDDDDDDDDD Remote LED                  S  M  S
                                                        i  a  l
                                                        n  s  a
                                                        g  t  v
                                                        l  e  e
                                                        e  r
                            ST-1144A
____

Anyway, it worked for me.

PS - I think it's totally disgusting that the drives do not ship with
this doc, and the newer drive (a 3144A) didn't even have the labels on
the motherboard the way the 1144a I had did.  Very poor policy, IMO.

)>I have two IDE's, both from the same manufacturer, and that required
)>setting jumpers for master and slave.  There was no problem in doing that. 
)>The problem I had (and still do) is how to get the drive light to show. 

Check out the 'remote LED jumper' on the *DRIVE* as above.  (That was my
problem).  [May need another jumper as well on the controller, but you
also need to set a jumper on the *drive*.).  9-10 on the segate model I 
have.