JAM167@psuvm.psu.edu (08/17/90)
Can anyone tell me what the jumpers on the the back of a Segate ST251 are supposed to be for? I have a second-hand drive - with no manuals. Thanks. -- Jim Meyers: Penn State Great Valley
mjoseph@ux1.cso.uiuc.edu (Mark Joseph) (08/17/90)
In article <90228.154810JAM167@psuvm.psu.edu> JAM167@psuvm.psu.edu writes: >Can anyone tell me what the jumpers on the the back of a Segate ST251 are >supposed to be for? I have a second-hand drive - with no manuals. >Thanks. > >-- Jim Meyers: Penn State Great Valley Looking at the drive with the circuit board side up: ------------------------- : : : : : : : : ------------- J1 J2 | | | | | | | | don't D D D D know S S S S 4 3 2 1 If this is the only drive in the system, and you have a twisted cable, jumper DS2 (Drive Select 2). If this is the only drive, and you have an untwisted cable, jumper DS1. If this is the second drive, jumper DS2. Some of this may depend on the particular controller, but it's a start. I do have the Seagate 'Universal Installation Handbook' (not much to it, really, but it does have some useful info), and I'd be glad to send copies out - email me if you're interested. mark joseph m-joseph@uiuc.edu (217) 244-2569
grege@gold.GVG.TEK.COM (Greg Ebert) (08/17/90)
In article <1990Aug16.223713.239@ux1.cso.uiuc.edu> mjoseph@ux1.cso.uiuc.edu (Mark Joseph) writes:
#
#------------------------- : : : : : : : : -------------
# J1 J2
# | | | | | | | |
# don't D D D D
# know S S S S
# 4 3 2 1
#
The "don't know" jumpers are probably terminators. Put them on the drive at
the end of the control cable. If you only have 1 drive, terminate it.
---------
[No, I don't mean "Drive over it with a steamroller" :-O ]jim@world.std.com (James D. McNamara) (08/17/90)
In article <1312@gold.GVG.TEK.COM> grege@gold.GVG.TEK.COM (Greg Ebert) writes: >In article <1990Aug16.223713.239@ux1.cso.uiuc.edu> mjoseph@ux1.cso.uiuc.edu (Mark Joseph) writes: ># >#------------------------- : : : : : : : : ------------- ># J1 J2 ># | | | | | | | | ># don't D D D D ># know S S S S ># 4 3 2 1 ># > >The "don't know" jumpers are probably terminators. Put them on the drive at >the end of the control cable. If you only have 1 drive, terminate it. > --------- >[No, I don't mean "Drive over it with a steamroller" :-O ] I installed a second ST251-1, and had to take the "terminating resistor" off of one of the drives. The terminating resistor is a 1" bar covering leads somewhere *else* on the drive. I jumped the "DS2", but left all other pins -- including the "DON'T KNOWS" -- open. I don't think the "DON'T KNOWS" need to be terminated. (BTW, a fellow netter suggested taping the unused terminating resistor onto the drive, so it doesn't get lost.) -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - James D. McNamara, jacked-in at... | jim@world.std.com 45 Cleveland Street #1, Arlington, MA 02174-6915| Phone: (617) 648-2440
skl@van-bc.wimsey.bc.ca (Samuel Lam) (08/17/90)
In article <1312@gold.GVG.TEK.COM>, grege@gold.GVG.TEK.COM (Greg Ebert) wrote: )In article <1990Aug16.223713.239@ux1.cso.uiuc.edu> mjoseph@ux1.cso.uiuc.edu ) (Mark Joseph) writes: )# )#------------------------- : : : : : : : : ------------- )# J1 J2 )# | | | | | | | | )# don't D D D D )# know S S S S )# 4 3 2 1 )# ) )The "don't know" jumpers are probably terminators. No. The "terminating resistor" for the Seagate ST-251 is at the bottom of the drive on the circuit board. If you turn the drive over and let its front face away from you and draw an imaginary line parallel to the side of the drive and through the spindle-tip, it should be somewhere along that line between the spindle-tip and the back of the drive. ...Sam -- Internet: <skl@wimsey.bc.ca> UUCP: {van-bc,ubc-cs,uunet}!wimsey.bc.ca!skl
mjoseph@ux1.cso.uiuc.edu (Mark Joseph) (08/18/90)
In article <1462@van-bc.wimsey.bc.ca> Samuel Lam <skl@wimsey.bc.ca> writes: > >No. The "terminating resistor" for the Seagate ST-251 is at the >bottom of the drive on the circuit board. If you turn the drive >over and let its front face away from you and draw an imaginary >line parallel to the side of the drive and through the spindle-tip, >it should be somewhere along that line between the spindle-tip >and the back of the drive. > Thanks, Sam. I should have clarified this in my note. The 'DONT KNOW' jumpers should definitely be left open. There is a separate terminating resistor pack as described above. My offer to mail copies of the manual stands. Email me for requests. mark joseph m-joseph@uiuc.edu
akm@spencer.cs.uoregon.edu (Anant Kartik Mithal) (08/18/90)
In article <1312@gold.GVG.TEK.COM> grege@gold.GVG.TEK.COM (Greg Ebert) writes: >In article <1990Aug16.223713.239@ux1.cso.uiuc.edu> mjoseph@ux1.cso.uiuc.edu (Mark Joseph) writes: ># >#------------------------- : : : : : : : : ------------- ># J1 J2 ># | | | | | | | | ># don't D D D D ># know S S S S ># 4 3 2 1 ># > >The "don't know" jumpers are probably terminators. Put them on the drive at >the end of the control cable. If you only have 1 drive, terminate it. > --------- No, no, they are *not* terminators. The terminators are in the middle of the circuit board. The jumpers are drive selects. Well, I suspect that they are. I *know* that 1-4 are drive selects, and I *suspect* the rest are too. I *think* that we could go up to 8 drives, but haven't heard of a controller card that allows that. The terminators sit on a totally different place on the logic board. kartik ----------------------------------------------------------------------------- Anant Kartik Mithal akm@cs.uoregon.edu Department of Computer Science akm@oregon.BITNET University of Oregon
ill@uni-paderborn.de (Markus Illenseer) (08/29/90)
JAM167@psuvm.psu.edu writes: >Can anyone tell me what the jumpers on the the back of a Segate ST251 are >supposed to be for? I have a second-hand drive - with no manuals. >Thanks. >-- Jim Meyers: Penn State Great Valley I suppose you mean theses Jumpers just beside of the connections at the rear... These ones are made to set the ID-Number, and normally, there arent usefull. On the left, (right ?) is ID 0 (drive C:) on the right (left?) ID 3 (Drive F:). As you can only use two hard-drives in you AT, you can jumper ID 0 and ID 1. But normally, a cable with three connection, wich is splitted at one end, and where are some cables turned, is used to connect two hard-drives.... So you only have to look whetather there is a jumper, or not. If not, your drive will not work.... Hoping this helps you.. CU, Markus ******************************************************************************** Markus Illenseer I'm sorry Dave, I can't do that. Bergstr. 4 /| /| | Odyssee 2001, Clarke 4790 Paderborn / | / | | United Germay / |/ | | Email: ill@uni-paderborn.de ********************************************************************************