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- Installing The ST11R Controller
- With A Seagate Disc Drive
-
- I. Introduction
-
- Seagate reserves the right to change, without notice, the specifications
- or other information contained in this file.
-
- The ST11R provides an interface between the IBM PC XT* (or compatible
- system) and up to two of the listed Seagate ST412 Run Length Limited (RLL
- 2,7) drives.
-
- *IBM PC XT is a registered trademark of International Business Machines
- Corporation.
-
-
- The ST11R uses RLL encoding at 7.5 megabits/sec. and is intended for
- use with drives certified for RLL. Seagate RLL drive models have an
- "R" suffix.
-
- Do not use the ST11R with Seagate drives designed for MFM recording at
- 5.0 megabits/sec.(no "R" suffix). Running this combination will void the
- warranty on the drive.
-
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- Drives supported by the ST11R controller.
-
- Drive Formatted MB Cylinders R/W Heads
-
- ST138R 32.7 615 4
- ST157R 49.1 615 6
- ST225R 21.0 667 2
- ST238R* 32.7 615 4
- ST250R 40.0 667 4
- ST277R 65.5 820 6
- ST4144R 122.7 1,024 9
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- *earlier versions of the ST238R did not have the "R" suffix but are RLL
- compatible.
-
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- Before attempting any installation, read through these instructions and
- verify that the system is powered-down.
-
- Once installed, the controller's onboard software will assist you with
- the help screens during the required formatting operation.
-
- -If your drive has more than 32 formatted megabytes, or if you want to
- create multiple logical drives, you must install device driver software.
- See Part III.
-
- Note: This device driver utility is only shipped with drives having greater
- than 32 formatted megabytes to Seagate's direct customers requesting it. If
- you did not receive the device driver software with your greater than 32
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- megabyte drive, contact your dealer or distributor.
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- II. Controller/Drive Installation
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- 1. Remove the top cover from the system. Retain the screws.
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- 2. Configuring the ST11R:
-
- -Remove the controller from the protective covering and pull all the
- conductive rubber strips from between the connector pins.
-
- -The BIOS PROM address jumper (four pins located in the middle of the
- ST11R), is used to select the desired address. Adding jumpers changes the
- address. (Locations A and B are the two pins toward the front of the system
- and D and C are the two pins toward the back of the system).
-
- When installing the ST11R in a system that does not contain any other
- hard disc controllers, all jumpers should be removed from the BIOS PROM
- address jumper. The ST11R is shipped with the correct configuration for
- one hard disc controller.
-
-
-
- When installing the ST11R in a system containing a Seagate ST01 Host
- Adapter, the ST11R must be jumpered at a lower BIOS address than the
- STO1.
-
- When installing the ST11R in a system already containing a hard disc
- controller, the ST11R must be jumpered at a higher BIOS address than the
- other controller. If you are not sure of the other controller's address,
- try one of the two higher addresses for the ST11R (i.e. D8000h or
- E0000h).
-
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- Configuration BIOS address Port Address
-
- No pins shorted C8000h 320h - 323h
- (factory setting)
-
- Pins A-B Shorted: D0000h 324h - 327h
- Pins C-D Shorted: D8000h 328h - 32Bh
-
- Pins A-B & C-D E0000h 32Ch - 32Fh
- Shorted:
-
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- III. Configure the Drive:
-
- Examine the cable which connects the controller to the J1 connector on
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- the drive. In many cases the cable will have connectors at both ends and
- a third connector approximately 6 inches from one end. The end with two
- connectors is connected to the drive. Check to see if the ribbon cable
- is split with a group of 5 wires twisted between the two connectors at the
- drive end.
-
- "C" Drive Configuration:
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- - If you have a twisted cable (as defined above), configure the drive as
- drive select 2.
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- - If you have an untwisted cable, configure the drive as drive select 1.
-
- Note: Drive select 1 is selected by shorting the 2 pins closest to
- where the 20 pin connector plugs into the drive. Drive select 2 is one
- set of pins over from the Drive select 1 position.
-
- "D" Drive Configuration:
-
- - if you are connecting a second hard disc to the ST11R, configure the
- drive as drive select 2.
-
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- - If you are installing a single drive, the resistor pack must remain
- installed. If you are installing two hard disc drives, remove the
- resistor termination pack from the drive that is attached to the middle
- connector on the J1 cable. When reinstalling a resistor pack, note that
- pin-1 on the pack is denoted by a dot or numeral one. A square pad on
- the disc drive board indicates pin-1 at the socket.
-
- - Verify that there is a jumper installed at J8 position 7 on the drive.
- There should be only 2 jumpers installed at J8.
-
- 4. Attach the Cables:
-
- Note that at all connections, pin-1 on the controller corresponds to pin-1
- on the drive. Some cables have a contrasting-color stripe on one edge to
- indicate pin-1.
-
-
-
- -Connect the J1 connector on the "C" drive to the connector at the end
- of the cable. Connect the J1 connector on the "D" drive (if present) to
- the middle connector on your cable. (Be sure to remove all the conductive
- rubber strips from between the connector pins even if that connector is not
- being used.
-
- -Connect the 20-pin connector on Drive "C" to the J2 connector on the
- ST11R. Connect the 20-pin connector on drive "D" (if present) to J3 on the
- ST11R.
-
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- 5. Install the controller into a vacant slot on the system motherboard.
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- 6. Mount the Drive:
-
- -Install the drive in the left bay, if possible, as the power supply may
- interfere with the routing of the cables. For ease of installation, attach
- J1, J2 and the power cable before you slide the drive completely back and
- into position.
-
- -Minimum requirements for mounting: 4. 6-32 UNC-2B x 0.31 (5/16) inch
- screws. Tighten the screws down evenly to 8 +/-.8 inch-lbs. Overtightening
- may cause drive damage.
-
- 7. Verify that all connections are correct and replace the system cover.
- Go to Part IV for the required formatting operation.
-
-
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- IV. Formatting A Drive With The ST11R
-
- To format a new hard disc, or reformat a drive that was previously
- formatted, follow this procedure.
-
- You will need:
-
- -The DOS* diskettes and documentation (use the same version of DOS
- throughout the formatting operation).
-
- *DOS is a registered trademark of Microsoft Corporation.
-
- -The defect list that was shipped with the drive. Some drives are
- shipped with the defect list fixed to the drive top cover.
-
- 1. Load a DOS bootable diskette in Drive A and power-on the system.
-
- 2. Once the boot procedure is completed, load the DOS diskette that
- contains the DEBUG.COM program (usually found on the "DOS Supplemental
- Programs" diskette) and type DEBUG followed by return at the A> prompt.
-
- 3. When DEBUG responds with the "-" prompt, type g=c800:5 followed by
- return.
-
- Further instructions will appear on your screen.
-
- Note: If you change the BIOS address from the default
- setting (see Controller/Drive Installation) you will need
- to type a different value in place of C800 (i.e g=D000:5)
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- 4. After initialization is complete you must partition and format your
- drive. See your DOS manual for instructions on the FDISK and FORMAT
- commands which will perform these functions.
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- V. Installing Device Driver Software
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- 1. Load the DOS diskette in Drive A and power-on the system.
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- 2. At the "A>" prompt, load the Disk Manager* diskette in drive A and
- type DM followed by return.
-
- *Disk Manager is a registered trademark of Ontrack Computer Systems, Inc.
-
- Follow the instructions on the screen. Help is available
- by pressing the F1 function key. Additional help is available
- in the DM.REF file on your Disk Manager diskette.
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