Play and Learn 2/19941.ZIP/19941/COMREF/HDGL/UINSTALL.TXT

Text File | 1994-02-05 | 16.5 KB | 405 lines

                               INTRODUCTION

     This file is organized to assist you in the installation of your
 Seagate disc drive.  The process entails configuring, mounting and
 formatting your drive.  Please note that information on product
 specifications is given in the product specification section of this
 bulletin board and will not be repeated here.

     Before attempting any installation, please read through all applicable
 sections of the installation instructions.  The sections are organized as
 follows:

 1.  This Introduction.

 2.  Describes the configuration of an ST412/506 Interface Drive.

 3.  Describes the configuration of an SCSI Interface drive.

 4.  Defines the physical drive installation procedure.

 5.  Describes the formatting operations necessary to use your drive
     with PC-DOS/MS-DOS.
                            Before You Begin

 - Verify that the system is switched off and disconnected from main power
   before any installation is attempted.

 - Do not unpack a drive until you are ready to install it in the system.

 - Always handle the drive by the frame or casting.

 - Do not touch the board components or connectors without observing
   static-discharge precautions.

 - Seagate disc drives do not require any preventative 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 or system, please ensure that they
   are correctly packed in the original container and shipped via an air-
   ride carrier.

ST412/506 Interface Drive Configuration

MFM Controller Selection

The hard disc controller you use will affect the performance of the drive.
To achieve full performance with an MFM drive, you must use an MFM
controller which operates the ST412/506/MFM interface at 5.0 megabits/sec.
Seagate does not recommend or endorse any particular controller.

Operation of an MFM drive at data rates other than 5.0 megabits/sec. or
operation of an MFM drive with an RLL controller is not approved by Seagate
and will void your warranty.


RLL Controller Selection

To achieve full performance with a Run Length Limited (RLL) drive you must
use an RLL (2,7) controller which operates the ST412/506/RLL interface at
7.5 megabits/sec.

Only Seagate drives with an R appended to the product number are designed
and certified for use with a Run Length Limited (RLL 2,7) controller.
Note: early ST238, RLL drives did not have the R suffix but are certified
for use with RLL.

Operation of an RLL drive at data rates other than 7.5 megabits/sec. or
operation of an RLL drive with an MFM controller is not approved by Seagate
and will void your warranty.


Write Precompensation

For optimum performance, provide write precompensation on only the
ST412/506/MFM drives listed below.  Drives not listed do not require write
precompensation.  (See the glossary section of this bulletin board for a
description of write precompensation.)

ST213, ST225            Cylinders 300 to 614
    ST4038                    Cylinders 300 to 732

Some controllers provide a default precompensation setting from cylinder
256.  The ST213/225/4038 will perform adequately at this default.


Drive Select Jumpers

A jumper must be installed to select the desired "Drive Select" number.
The drive select jumpers are a series of 2 pin jumpers located between the
PC Board edge connectors.  Drive select 1 is selected by putting the jumper
vertically on the 2 pins that are closest to the smaller (20 pin) edge
connector.  Similarly, drive select 2 is selected by putting the jumper
vertically on the second set of 2 pins as you count away from the smaller
edge connector.


IBM PC/XT/AT and Compatibles Installations:

Examine the 34 pin ribbon cable (the wider cable) that connects the
controller to the J1 connector on the drive.  In many cases the cable will
have connectors at both ends and a connector about six inches from one end.
The end with two connectors is connected to the drive.  The other end is
connected to the controller.  Next check to see if the ribbon cable has a
split with a group of wires twisted between the two connectors at the drive
end of the cable.

"C" Drive Configuration:

-If you have a cable with a twist in it, configure the drive as drive select
2.

-If you have a cable with no twist, configure the drive as drive select 1.

"D" Drive Configuration:

-If you are connecting a second hard disc drive to the system, configure the
drive as drive select 2.

Attach the Cables:

Note that at all connections, pin 1 on the controller corresponds to pin 1
on the drive.  Most cables have a contrasting colored wire (usually red or
blue) on one edge of the cable to indicate pin 1.  For both J1 and J2 edge
connectors, pin 1 is facing the DC power connector J3.  On the controller,
pin 1 is often indicated by a 1 etched into the board or a square solder
pad on the back.

Connect the J1 connector on the "C" drive to the connector at the end of
the wide ribbon cable.  Connect the J1 connector on the "D" drive to the
middle connector on your wide ribbon cable.  Connect the J2 connectors on
each drive to the smaller ribbon cables and connect the cables to the
appropriate connectors on the controller.

Resistor Termination Packs

Each Seagate drive comes from the factory with a resistor termination  pack
installed.  If you are installing a single hard drive, the resistor pack
must remain installed.  If you are installing two hard drives, you must
remove the resistor termination pack from the "D" drive (the one connected
to the middle of the cable).

The resistor termination pack is usually a thin plastic component with 10
legs located in a socket on the drive's PC Board very near the J1
connector.  Please refer to the figures in the universal installation
guide.

When reinstalling the resistor termination pack, note that pin 1 on the
pack is denoted by a dot or numeral one.  A square pad on the drive board
indicates pin 1 at the socket.



Read/Write Head Auto-Park

All Seagate disc drives, with the exception of the ST213, ST225, ST225N and
ST238R products, have an automatic read/write head parking function at
power off.  This feature does not require operator intervention.

Some versions of DOS support a parking command for the products listed
above.  Refer to the system documentation.  Third party software is also
available for this task.  Contact your dealer, distributor or systems
integrator.

Note that parking routines should not be used with drives that have the
auto-park feature.

SCSI INTERFACE DRIVE CONFIGURATION

Seagate intelligent drives, designated by an N appended to the  product
number, i.e. ST251N, have an onboard controller that supports the SCSI
interface as defined in the ANSI X3T9.2/82 document.

SCSI INTERFACE CABLE CONFIGURATION

System connection is via a 50-pin, SCSI connector. Pin-1, on the cable, is
usually indicated by a colored stripe, (red or blue). When connecting the
cable to the drive, the stripe should always be next to the power
connector. When using a Seagate host adaptor, pin-1 is marked by a 1 by
the connector.  Strain relief is recommended at the cable.

SCSI ADDRESS SELECTION

The SCSI address jumpers are located adjacent to the 50-pin, SCSI
interface connector. Seagate ships the drives set for ID 0,(drive number
1). This means no jumpers should be shorting, except the P-jumper for
parity. (see below)


OPTIONAL PARITY BIT ENABLE

Some system buses require parity bit checking. Consult the system
documentation for the specific requirements.

Most drives have an additional two jumper pins to enable parity. They are
located with the SCSI address jumper pins. To enable parity, short the P-
jumper pins. To disable parity, remove the P-jumper. The parity jumper
pins are the set of pins closest to the SCSI cable.

NOTE: Earlier versions of the ST225N may not have these jumper pins, and this
option is unavailable.

RESISTOR TERMINATION PACKS

If you are installing a single drive, the resistor termination packs must
remain installed. When installing resistor packs, note that pin-1 is
designated by a dot or numeral one on the pack. A square pad on the board
indicates pin-1 at the resistor pack socket.

If you are installing two or more drives, remove the resistor packs on all
but the last drive in the chain.

Disc Drive Installation

Do not touch the edge-connectors or any board components without observing
static-discharge precautions.  Always handle the drive by the frame only.

The drive may be mounted horizontally (main circuit board down) or on
either side (edge).  Mounting vertically on either end or with the printed
circuit board up are prohibited orientations and will void your warranty.

-Four, 6-32 UNC-2B x 0.31 (5/16) screws are required for mounting in an IBM
PC XT chassis.  Tighten the screws down evenly to approximately 8 inch-
lbs.  Do not over tighten as doing so may damage your drive.

-5.25 inch, half-height drives: The mounting screws must not extend inside
the mounting feet more than 1/8 inch, measured from the outside surface of
the foot.  If all the system mounting holes are not coplanar and/or do not
line up with the drive mounting holes, do not force the drive to conform
as this may damage the drive.

-A PC AT installation requires mounting rails, which fasten directly to the
drive frame or mounting feet.  They allow the drive to slide into the PC
AT chassis.  It is not possible to install rails if a front panel is
already installed.  Remove the front panel before installing rails.

-During the formatting procedure you will need to know the location of each
hard error  on your drive.  This information is found on the hard error
map which is either on a sheet packed with the drive, or on a sticker
attached to the top cover of the drive.  If the hard error map is attached
to the drive, copy the information to a sheet of paper so that you can
reference  it during the formatting operations when the sticker will be
hidden inside the system.

Do not power-up until the drive is mounted and the system cover is replaced.

Before replacing the cover, check the following:

1.)Verify that all connections between the drive and the controller are
correctly installed.  Some cables have a contrasting-color stripe
indicating pin 1.  The even-numbered pins are on the same side of the
board as the resistor termination pack(s).  Pin 2 is labeled on the
circuit board edge-connectors.

2.)Connect the drive DC power connector (J3).

3.)Verify correct cabling, jumper and resistor-pack configuration.

Your are now ready to secure the drive into position and replace the
system cover.

Continue to the primary format operations.

Drive Formatting

The MFM/RLL drive format routine is detailed below.

If you are installing a Seagate disc drive with a Seagate controller or Host
adaptor, refer to the installation guide that was shipped with the controller
or host adaptor for formatting instructions.


ST412/506 Interface MFM and RLL Drive Formatting

The formatting operation has three distinct steps, which must each be
performed before the drive may be used.

-A low-level (or primary) format to establish communications between the
drive and the controller.

-Partitioning the drive into one or more logical drives.

-A high-level (or logical) format to install the operating system on the
drive.

Caution: you must use the same version of DOS throughout the formatting
process or your drive may not operate properly.

Drives with greater than 32 megabytes of formatted capacity require device
driver and partitioning software for formatting.  Seagate ships Disk Manager
by Ontrack Computer Systems to overcome the DOS limitation of 32 megabytes.
The software is shipped only with drives that format to greater than 32
megabytes.  Disk Manager will perform all three steps in the formatting
process.



Low Level Format Using DOS

On an XT system the low level format is performed using the DEBUG program
that comes on either your DOS system or supplemental diskette.  The format
routine is begun by putting the floppy diskette containing the DEBUG program
in your A floppy drive and at the A prompt typing "debug" and hit the ENTER
key.  Your computer should respond with a - (minus sign) as the prompt.  At
the - prompt type "G=" followed by the address of the ROM on your controller
and hit the ENTER key.  For example, for a Seagate controller, at the -
prompt you would type "G=C800:5" and hit the ENTER key.  This will activate
the controller's low level format routine.  The most common ROM address is
C800:5.  If your controller does not respond to this address you may wish to
try one or more of the following:

C800:CCC
C800:6
C800:13C

If none of these addresses work, you should contact your controller
manufacturer for the correct procedure for your controller.

On an AT system, the low level format is completed using the AT advanced
diagnostics program, available from IBM.

You may be asked by the DEBUG or diagnostic program to enter the following
parameters (see your controller or software manual):

1.Number of cylinders (See the Seagate product specifications section of
this bulletin board or your universal installation guide)

2.Number of heads (See product specifications)

3.Starting cylinder for reduced write current.  This is not required for any
Seagate drive.  Enter the last cylinder + 1.  For example, on a ST225
which has 615 cylinders and 4 heads, enter 616 for starting cylinder for
reduced write current.

4.Starting cylinder for write precompensation.  The ST213, ST225 and ST4038
require write precompensation from cylinder 300 to the last cylinder on
the drive.  All other Seagate drives do not require write precompensation
and the last cylinder + 1 should be entered as the starting write
precompensation cylinder (as above).

5.Maximum correctable error burst (ECC).  Use the default setting for your
controller as this is a controller function and not a drive function.

6.Buffered step pulse rate. See the drive specifications section of this
bulletin board for the acceptable range for your drive and select the
closest controller option within this range as specified in your
controller documentation.


Be sure to spare out any hard errors listed on the drive Final Test sheet
(shipped with the drive) if the format program allows you to enter a bad
track list.  Note: some drives have the defect list fixed to the top cover.


Partitioning

The drive can be partitioned with the FDISK program provided on the DOS
diskette.  To use FDISK, put your DOS diskette in the A floppy drive and at
the A> prompt, type FDISK.  Follow the menus to create a DOS partition.
Consult your DOS manual for further instructions on using FDISK.


Logical Format

The high-level or logical format can be done with the FORMAT program also
provided on the DOS diskette.  If a logical partition on this drive is to be
the boot disk for your computer, be sure to copy the necessary operating
system files to that partition.  For example, to format the C drive and copy
the operating system files to it so that it is the boot volume, put the DOS
diskette in drive A and at the A> prompt type "Format C: /S".  For further
information on using the FORMAT command, consult your DOS manual.


Note: Disk Manager by Ontrack Computer Systems is shipped with all Seagate
drives of formatted capacity greater than 32 megabytes.  It will
automatically perform all three of the above described steps on either an XT
or AT type machine.  For assistance using Disk Manager, print the README file
which resides on your Disk Manager diskette.  You may also contact Ontrack
Computer Systems or Seagate Telephone technical support.


Installation Troubleshooting Checklist

-Check power connection J3. Make sure that the connection is seated
correctly.

-Check ribbon cables. Make sure that pin-1 is connected to pin-1.

-Check drive select jumper and resistor termination pack. (See physical
installation section of this bulletin board)

-Check power supply.  Check both the +5 and +12 volt lines from the power
supply.

-Check controller jumpers (see controller documentation)

-Verify drive parameters (see drive specifications)

-Contact your dealer (be sure to have your controller, drive and system
documentation handy)

-Contact Seagate Telephone Technical Support at [phone].