





                 INSTALLING SEAGATE'S RLL PAIRED SOLUTIONS

                          I. INTRODUCTION

 Seagate's ST11R controller and RLL drive package offers a complete RLL
 Paired  Solution.  This  section  of  the  database will assist you in the
 installation of your Seagate RLL drive  and controller.  Before beginning,
 please read through the entire section.

 Seagate provides partitioning software pre-loaded on the drive for drives
 over 32 formatted Mb.


 BEFORE YOU BEGIN...

 - Seagate RLL Paired Program disc drives are shipped to you already
 formatted with a small DOS partition. The programs necessary to install
 the drive are contained in that partition. You must supply the DOS* system
 programs. You will be prompted with display screens at each step in the
 installation process. Paired Program drives with formatted capacities
 greater than 32-Mb are shipped with software to access multiple
 partitions or partitions larger than 32 Mb.

 * DOS is a registered trademark of Microsoft Corporation

 - REFER  TO  THE  MATRIX  IN  TABLE  1 FOR SEAGATE DRIVES SUPPORTED BY THE
 ST11R.

 - A printable README file, containing supplemental installation
 information, is included with the installation software and is accessible
 via the DOS system commands.

 - The ST11R is designed to be installed only with drives certified for
 RLL (2,7) data encoding. Use with Seagate drives designed for MFM-only
 data encoding will void your drive warranty. Even though an MFM drive may
 initially format correctly with an RLL controller, performance may
 degrade over time. Seagate assumes no liability for installation of an
 RLL controller with an MFM-certified disc drive.

 - Seagate disc drives do not require any preventive maintenance. The
 head/disc assembly is sealed and does not contain any user-serviceable
 components. Do not tamper with the sealed top cover. Doing so will void
 your warranty.

 - When transporting or shipping a drive, controller or system, please
 ensure that they are correctly packed in the original container and
 shipped via an air-ride carrier.

 -  Installation Warning: Do not touch the board components or connectors
 without observing static-discharge precautions. A grounded wrist-strap is
 preferred. If that is unavailable, ground yourself by touching the metal
 chassis of the system before handling any components. Do not unpack the
 components until you are ready to install them in the system.






 -  Do not install the ST11R controller and apply power without first
 removing the rubber strips from all connectors on the controller. These
 strips are conductive. Failure to observe this warning will void the
 controller's warranty and can cause serious problems in your system.


 ST11R Controller and Drive Compatibility

 The ST11R supports up to two (2) of the following drives:

                          Table 1

 Drive     Formatted MB   Cylinders*  R/W Heads    Sectors
 ST138R        32.7          615          4          26
 ST157R        49.1          615          6          26
 ST225R        21.0          667          2          31
 ST238R        32.7          615          4          26
 ST250R        42.3          667          4          31
 ST277R        65.5          820          6          26
 ST4144R      122.7         1,024         9          26

 * Maximum cylinders per drive.

 Usable cylinders are reduced by:

 a) One (1) cylinder for drive geometry and defect information.

 b) One (1) cylinder for diagnostic area.

 c) One or more cylinders for alternate tracks. Alternate track assignment
 is only made if defects involve more than one sector on a track. Single
 sector defects are compensated for within the track on which they occur.
 Alternate track assignment is only made when installing a drive through
 the BIOS (e.g.,DEBUG,-G=C800:5) or with the INSTALLR installation program
 (see Section IV.).



 II. ST11R Controller Setup

 1) Remove the ST11R from the protective covering and pull the conductive
 rubber strips from between the pins at the J1, J2 and J3 headers. These
 strips provide static-discharge protection during transit. FAILURE TO
 REMOVE BEFORE INSTALLATION CAN CAUSE SERIOUS PROBLEMS IN YOUR CONTROLLER
 AND SYSTEM.

 2) Configure the ST11R:

 C8000h is the default BIOS address. If there is a board already installed
 at this address in you system, use the jumpers provided to change to
 another 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.
 Refer to the documentation provided with your system  and other peripheral
 devices to determine if there is an address conflict.  See Table I below.






 The ST11R has four possible starting addresses:

                         Table 2

 CONFIGURATION             BIOS ADDRESS        PORT ADDRESS

 No Pins Shorted          C8000h (default)   320h - 323h
 Pins A-B shorted         D0000h             324h - 327h
 Pins C-D shorted         D8000h             328h - 32Bh
 Pins A-B & C-D shorted   E0000h             32Ch - 32Fh

 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 with the Seagate STO1 SCSI Host
 Adaptor, the ST11R must  be configured  at a  lower BIOS  address than the
 ST01.

 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 higher addresses for the ST11R (e.g.,D8OOOh or E0000h).


 3). The J5 header on the ST11R may be used to provide disc drive power
 for systems lacking auxiliary power connectors. See your Dealer for
 cabling. Note: Some early configurations of the ST11R may not include the
 J5 header.

 J5 is pinned out as follows:

 Pin            Signal         Description
  1            +12 VDC         + 12 Volt DC Supply
  2            +12 VDC         + 12 Volt DC Supply
  3             +5 VDC         + 5 Volt DC Supply
  4              GND           Pin removed for connector key
  5              GND           Ground
  6              GND           Ground

 Note: Pin 1 is toward the from and top of the system and also indicated by
 a square solder through pad on the ST11R.


 III. Drive Configuration And Installation

 Prior to installation, rest the drive on a padded anti-static surface;
 never on an unprotected hard surface.

 Do not touch the board components or connectors without observing static-
 discharge precautions. A grounded wrist-strap is preferred. If that is not
 available, ground yourself by  touching the  metal chassis  of your system





 before handling any components.

 VERIFY THAT THE POWER IS OFF. Remove the top cover from your system.
 Access to the top cover screws is via the back of the system. Save the
 screws.

 1) Drive Select Jumpers:

 2) Installation of one drive requires a jumper at its Drive Select 1
 position. Note: Drive select 1 is selected by shorting the 2 pins closest
 to where the 20 pin connector plugs into the drive.  With one exception,
 noted  in  bullet  4  below,  the  second drive must have its Drive Select
 jumper at the DS2 position.  Drive select 2 is one set  of pins  over from
 the drive select 1 position.

 Note: Check that there also is a jumper installed at position 7 on the
 Drive Select header. There should be only two jumpers installed at the
 Drive Select header.

 3) Drive Resistor Termination Packs:

 If you are installing a single drive, the resistor termination pack must
 remain installed. If you are installing two drives, remove the pack from
 the drive connected at the middle of the 34 pin cable.

 When installing the resistor termination packs, note that pin-1 is
 designated by a dot or number 1 on the pack. A square pad on the PCB
 indicates pin-1 at the socket.

 4) Drive Cables:

 J1:   With one  exception, the  first (or only) hard drive attached to the
 ST11R will be Drive Select 1 ("C") and the second, Drive Select 2 ("D").
 Mate the J1 (the large ribbon  cable) connector  on the  "C" drive  to the
 connector at  the end  of the  cable. Connect  J1 on  the "D" drive (if it
 exists) to the middle connector on  your cable.  Note: J1  - Pin  1 on the
 ST11R is toward the front of your system and is also indicated by a square
 solder through pad.

 J2:  Connect the  20-pin connector  (the  small ribbon  cable) on
 Drive  "C" to the J2 connector on the ST11R. Connect the 20-pin connector
 on Drive "D" (if it exists) to the J3 connector on the ST11R.  Note: J2 is
 the 20  pin connector  at the top of the ST11R and in line with J1, the 34
 pin connector.  Pin 1 on both J2 and J3 is toward the front of your system
 and is also indicated with a square solder through pad.

 Note that for all connections, pin-1  on the  controller corresponds to
 pin-1  on the  drive. Some cables  have a contrasting-color  strip on one
 wire to indicate pin-1.

 EXCEPTION: If there are two drives installed, and the common ribbon cable
 (the cable between the two drives) has a set of 5 wires that are split and
 twisted  off at  one connector,  then both  drives must  be set  as Drive
 Select 2.






 Your software will still recognize the drives separately as Drive "C" and
 "D".  Remove the resistor pack  from the drive in  the middle (closest to
 the controller) of the cable.

 5)  Install  the  controller  in  one  of  the  expansion  slots  on  the
 motherboard in your computer. Note: Do not use the expansion slot that is
 closest to the power supply in your system.

 6) Mount The Drive:

 If  possible, install the drive in the left bay (viewed from the front of
 the  system), as the  power supply may  obstruct the cables.  For ease of
 installation,  attach J1,  J2 and  the power  cable before  you slide the
 drive completely into position.

 Minimum required for mounting: 4, 6-32 UNC-2B X 0.31-inch screws. Tighten
 the screws down evenly to 8 +/-.8 inch-lbs. OVERTIGHTENING OR USING SCREWS
 THAT ARE TOO LONG MAY CAUSE DRIVE DAMAGE.

 7)  Verify that all connections are correct and replace the system cover.
 Go to Section IV. for the required formatting operation.


 IV. Preparing The Drive

 The  installation  process  will low-level  format  new  physical blocks,
 create  DOS-compatible partitions,  root directories  and file allocation
 tables  for the entire drive. This procedure  is identical for IBM XT* and
 AT* systems, except where indicated.

 *XT and AT are  registered trademarks  of International  Business Machines
 Corp.

 All   drives  are   shipped  with   a  small   DOS  partition  containing
 INSTALLR.EXE,  PARK.EXE and  README.1ST (a  printable supplement  to this
 installation  guide).  README.1ST  will contain  the  latest installation
 information  for the drive being installed and can be accessed by the DOS
 system commands: TYPE, COPY or PRINT (i.e. A>type C:readme.1st).

 Drives   having  more  than  32  formatted  megabytes  are  shipped  with
 partitioning    software,  referred  to  as  Disk  Manager*. This software
 supports multiple DOS partitions on a single drive  and partitions greater
 than 32  Mb.   A number   of  reference   files (.REF)  provide additional
 information concerning  the  partitioning   process. These  files   can be
 accessed by DOS system commands: TYPE, COPY and PRINT.

 *Disk Manager is a registered trademark of Ontrack Computer Systems.

 IF YOUR DISC HAS LESS THAN 32 FORMATTED MEGABYTES, you will need one DOS-
 bootable  diskette that has the  boot files from the  version of DOS that
 you  plan to use on your Seagate drive. This diskette should also contain
 the  FORMAT program provided  with your DOS  system, and sufficient space
 (approximately  50-Kb) to  save the  installation programs  from the hard





 disc. The diskette must not be write-protected.

 If  your disc drive has  more than 32 formatted  megabytes, you will need
 two  diskettes to  complete the  installation process.  Only one diskette
 must  be DOS-bootable with the  version of DOS that  you plan to use. The
 second  diskette  must  have  at  least  320-Kb  available  to  save  the
 installation  and Disk Manager programs. The diskettes must not be write-
 protected.

 IMPORTANT INFORMATION FOR PC AT INSTALLATIONS:


 - If you are installing your drive in a PC AT or compatible machine and a
 standard  hard drive is  not presently attached  or operational, the hard
 drive count  in CMOS RAM will already be set to zero.  It is not necessary
 to change the CMOS RAM drive count when installing Seagate  paired program
 drives.

 - If a  hard drive  is already attached and operational in your system, it
 will be  the first  drive and   the  Seagate   paired drive   will  be the
 second drive.  It is not necessary to change the CMOS RAM hard drive count
 when installing Seagate Paired Program drives.

 If you are installing a second hard drive  in your system and Disk Manager
 is  used,  it  is  important  that the Disk Manager driver (DMDRVR.BIN) is
 loaded on  the boot drive  and  a  "device    =  DMDRVR.BIN"  statement is
 contained in  the   CONFIG.SYS file on that drive. Normally this statement
 should follow any "device =" statement for the boot drive.

 WARNING TO INSTALLERS AND/OR SECOND DRIVE INSTALLATIONS:
 DOS  assigns a  logical identifier (C,D,E...)  to each  partition that it
 recognizes  during the  boot load. DOS  assigns identifiers  to the first
 partition   on  each  physical  drive  before  assigning  identifiers  to
 additional  partitions. Therefore, if you have  a single drive with three
 partitions, they will be assigned C,D and E.

 However,  if a second drive is installed,  the first partition on drive 1
 will  be assigned C, the  first partition on drive  2 will be assigned D,
 then  E  and F  will  be assigned to remaining  partitions on   drive   1.
 Any  additional   partitions  on  drive  2  will  be  assigned  subsequent
 identifiers. It  is  important to   note  that the  partitions  previously
 identified as D and E will change when the second drive is added.

 The  PARK program supplied with  your drive is required  only to park the
 read/write  heads for the ST238R. Always park the read/write heads before
 your  drive/system  is  transported.  All  other  Seagate  drives feature
 automatic head-park when the power is removed.


 Software Installation Procedure:

 1)  Place a DOS-bootable diskette* in drive  A and switch the power on. If
 you  have correctly installed the drive  and controller, "ST11R Hard Disc
 Installation  Vx.x" will be displayed, followed by a screen prompting you





 to the next step. Each step in the process is lead by screen prompts. For
 specific  DOS  questions,  refer to  the  DOS manual  supplied  with your
 system.

 * The  DOS bootable  diskette must have the boot files from the version of
 DOS that you  plan  to  use  with  your  Seagate  drive  (Do  not  mix DOS
 versions).  The FORMAT program provided with your DOS operation system and
 sufficient space (50kb) to  save the  installation programs  stored on the
 drive.  This diskette must not be write protected.

 2)  After the boot process is complete, begin the installation by typing:
 C:INSTALLR C, or if you are installing a second hard drive, D:INSTALLR D.

 3)  If  you are  installing  a Paired  Program  drive with  more  than 32
 formatted  MB,  you will  be instructed  to remove  the DOS  diskette and
 insert  a  blank diskette*  to  make a  backup  copy of  the  Disk Manager
 software.

 * This  second diskette  must have  at least  320Kb available  to save the
 installation and Disk Manager programs stored on the drive.  This diskette
 must not be write protected.

 If  you are installing a  drive with Disk Manager  and you already have a
 hard  disc  drive in  your  system, you    must copy  the  DMDRVR.SYS and
 CONFIG.SYS  files from the Disk Manager  diskette to the existing (first)
 drive. If you already have a CONFIG.SYS file on the boot disc, update the
 file  to include the line "device = DMDRVR.BIN". Refer to your DOS manual
 for instructions on editing your CONFIG.SYS file.

 The  Disk Manager  software will assist  you during the  remainder of the
 format process with screen prompts.

 If  you prefer,  you may use  the partitioning and  high level formatting
 software  supplied with your DOS system (FDISK and FORMAT). If you select
 this option during installation, the installation software will perform a
 low-level format of your drive before exiting to DOS.

 4) The entire software installation routine is menu-driven and takes from
 ten  to  thirty minutes,  depending on  drive size.  After the  format is
 complete the read/write heads will be parked. At next power-up the system
 will boot from the hard disc.


 V. Alternate Drive Formatting Method

 To  format a  new hard  disc, or reformat  a drive,  follow the procedure
 noted below. You will need:

 -  Your DOS  diskettes and  documentation - Use  the same  version of DOS
 throughout the formatting operation.

 -  The defect  list that  was  shipped with  the drive.  Note: Some drives
 are shipped with the defect list fixed to the drive top cover.






 1) Load a DOS-bootable diskette in drive A and turn the power on.

 2) Once the boot process is complete, 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.

 When  DEBUG  responds  with the  "-"  prompt, type  g=C800:5  followed by
 return. Additional instructions will appear on your screen.

 Note:  If  you changed  the BIOS  address from  the default  setting (see
 Section  II.) you  will need to   type  a   different value  in   place of
 C800:5 (i.e. D000:5).


 VI. Disk Manager

 1) Insert your DOS diskette in Drive A and turn the power on.

 2) At the "A>" prompt, load your copy of Disk Manager in drive A and type
 "DM" followed by return.

 Follow   the instructions  on the screen. Help is available throughout the
 program by pressing the F1 function key.


 VII. Troubleshooting Your Installation

 If  you have a  problem getting the  initial screen or  later getting the
 system to boot:

 -  Check the cabling between  the controller and the  drive: Pin-1 on the
 controller corresponds to pin-1 at the drive. The contrasting color strip
 on the cable should be attached to pin-1.

 -  Check the power cable on the  drive. When power is applied, you should
 be able to hear the drive motor.

 - Verify that the Drive Select jumper at the drive is set correctly.

 -  Verify the BIOS addresses on the ST11R.  If you have more than one disc
 drive  or  tape  controller  that  uses  BIOS  ROM  space,  each  must be
 configured to operate at a different memory address. Addressing multiple
 controllers  at  the same  memory  location can  cause  problems of  a
 seemingly indeterminate nature. If you suspect this type of problem, turn
 off  the power  to your  computer, remove  the controller  and change the
 jumper setting. Refer to Section II.

 -   If  you  experience  problems  accessing  your  DOS  partition  after
 installation,  refer to  the .REF  files provided  with the  Disk Manager
 software  for additional information regarding deviations in hardware and
 DOS systems from various suppliers.




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