previous page: Hard Drive: SEAGATE: ST3120A 107MB 3.5"/SL    IDE / AT
page up: Hard Drive Specs from SEAGATE
next page: Hard Drive: SEAGATE: ST31230DC 1060MB 3.5"/SL    SCSI2 WIDE

Hard Drive: SEAGATE: ST31220A MEDALIST 1083MB 3.5"/SL ATA2 FAST

S T 3 1 2 2 0 A         M E D A L I S T    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/SLIMLINE         Cylinders        | 2099|     |
Capacity form/unform  1083/      MB        Heads           6|   16|     |
Seek time   / track  12.0/ 3.5 ms          Sector/track     |   63|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           256 KB SEGMENTED    Landing Zone
Data transfer rate    4.500 MB/S int       Bytes/Sector      512
                     16.600 MB/S ext PIO4
Recording method     RLL 1/7                        operating  | non-operating
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 70
Power: sleep              W     Humidity     %         8 80    |      5 95
       standby        1.0 W     Altitude    km    -0.305  3.048| -0.305 12.192
       idle           2.8 W     Shock        g        10       |     75
       seek           6.6 W     Rotation   RPM      4500
       read/write     4.5 W     Acoustic   dBA        33
       spin-up        7.0 W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month        12
Lift/Lock/Park     YES          Certificates     CSA,FCC,UL1950,UL478,VDE


SEAGATE ST3780A/ST31220A PRODUCT MANUAL 36260-001 DRAFT 10, 6/94

  |                                                         |+-+J5
  |                                                         |
  |                                                         |XX
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E J1
  |                                                         |XX R
  |                                                         |XX F
  +--J8                                                     |XX A
  |  |                                                      |XX C
  |  |                                                      |XX E
  |  |                                                      |XX
  +--1                                                      |  1
  |                                                         |XX J3
  |                                                 +--J6   |XX


SEAGATE ST3780A/ST31220A PRODUCT MANUAL 36260-001, DRAFT 10, 6/94

Jumper Setting

You can connect two drives to a daisy-chain cable if both drives meet
the same interface specifications. In a dual-drive configuration, one
drive is designated as the master (drive 0) and the other as the
slave (drive 1).

If you intend to use the cable select option in a dual-drive system,
before continuing you should determine whether your system supports
it. See your computer documentation for details.

Jumper sizes
The jumper blocks use 0.1-inch configuration jumpers. Use Seagate
part number 10562-001 or an equivalent. The drive is shipped with
spare jumpers which may be used on any jumper block.

If you try to install a jumper that is not the correct size, you
could damage the jumper and the jumper block pins.

J5 Master/Slave jumper block

    --+---+--Circuit board
      |o 1|
      |o o|  No jumper = One drive only

    --+---+--Circuit board
      |o o|  Spare - as shipped

    --+---+--Circuit board
      |o X|
      |o X|  Drive is slave

    --+---+--Circuit board
      |X 1|
      |X o|  Drive is master with slave present

    --+---+--Circuit board
      |X X|
      |X X|  Cable select. You must also install a jumper on pins 6
      +---+  and 8 of J8.

Your drive is shipped with a jumper in a spare location on pins 1 and
3 of the master/slave jumper block. If you are installing only one
drive, you can leave the jumper installed on pins 1 and 3, or you can
remove all jumpers from the jumper block.

You can install up to two drives in a standard AT system. If you are
installing two drives in your system, configure one drive as the
master and the other as the slave according to the following guide-

 - To configure the drive as a master with a slave present, install a
   jumper on pins 3 and 4 only of the master/slave jumper block of the
   master drive.

   If both the master and the slave are ST31220 family drives, you do
   not need to install a jumper on pins 3 and 4. This is because the
   master can detect the presence of the slave using the DASP- signal
   on the AT interface cable. If the drives in your application do not
   implement the DASP- signal, install the jumper on pins 2 and 4 of
   the master/slave jumper block on the master drive only.

 - To configure the drive as a slave, install a jumper on pins 1 and 2
   only of the master/slave jumper block on the slave drive.

With the aid of a special interface ribbon cable, the cable select
option allows you to determine the master and slave according to
where the drives are plugged into the cable.

J6 Dual-drive emulation jumper block

    --+--1+--Circuit board
      |o o|  Spare - as shipped

    --+--1+--Circuit board
      |X X|
      |X X|  Dual-drive emulation mode

With jumpers installed on pins 1 and 2, and pins 3 and 4 of jumper
block J6 you can install this drive as both C and D drives
simultaneously. Under dual-drive emulation, capacities are as
follows: for the ST31220A, each subdrive has a capacity of 528 MB for
a total of 720 MB.

Installation in this manner causes the drive to appear to your system
as two drives, master and slave, so an additional slave drive cannot
be added.

When the drive is configured with dual-drive emulation, both emulated
drives respond as one to any power-management command.

J8 Options jumper block

  --+-------------1-+--Circuit board
    | o o o o o   X |
    | o o o o o o X | Spare - as shipped

  --+-------------1-+--Circuit board
    | o o o o o   o |
    | o o o xxx o o | Cable select

  --+-------------1-+--Circuit board
    | X o o o o   o |
    | X o o o o o o | Remote LED connection pin 13(-), pin 14(+)

 Remote LED connection
 To add an optional remote LED, attach a two-pin, 0.1-inch connector
 to pins 13 (-) and 14 (+) of the options jumper block J8.

All other pins are reserved, don't use them.

Cable select option
If your computer and both of ypur drives support cable select, you
can use the cable select option to determine the master and slave. To
configure your drives using cable select, you need to install jumpers
and use a special cable-select cable as follows:

 - Install jumpers on pins 1 and 2 and pins 3 and 4 of the master/
   slave jumper block J5 and on pins 6 and 8 of the options jumper
   block J8.

 - You must use an interface ribbon cable built to support master and
   slave selection. The cable and its connectors must connect the CSEL
   signal line to pin 28 of the master drive, but not to the slave
   drive. That is, the drive that is plugged into the I/O connector
   connecting the CSEL signal line to pin 28 is the master. The drive
   plugged into the I/O connector, whose pin 28 is open, is the slave.
   Pin 28 of its cable connector is not connected to the CSEL line.


SEAGATE ST3780A/ST31220A PRODUCT MANUAL 36260-001, DRAFT 10, 6/94

Notes on Installation

Mounting the drive
You can mount the drive in any orientation.

If you format the drive before mounting in the computer, it is best
to format it in the same physical orientation it will have when it is

Use the set of mounting guidelines below taht are appropriate to the
type of mounting holes used: either bottom mounting holes or side
mounting holes.

Mounting with the optional 1-inch faceplate adds 0.180 inches 0.010
inches (4.572 mm 0.254 mm) to the overall drive length.

Bottom mounting holes
Insert four 6-32 UNC screws in the four bottom mounting holes.

Do not insert the bottom mounting screws more that 0.20 inches (6
turns) into the drive frame. If you use a screw that is too long, you
risk damaging the drive's circuit board.

Side mounting holes
Use four 6-32 UNC screws in four of the six available side mounting
holes. Use two mounting holes on each side of the drive.

Do not insert the side mounting screws more than 0.20 inches (6
turns) into the drive frame. If you use a screw that is too long, you
risk damaging the drive's circuit board.

I/O cable and connector
The I/O connector is a 40-pin connector. The even pins are next to
the edge of the printed circuit board; the odd pins are away from the
printed circuit board. Pin 1 is near the 4-pin power connector.

There is no pin 20 because that location is used as a key. Make sure
the corresponding pin hole on the cable connector is plugged to
prevent the connector from being installed upside down. The I/O cable
cannot be longer than 18 inches (0.46 meters).

The table below lists recommended parts for the mating connector. You
can use equivalent parts.

 Part       |Description     |3M part number
 Connector  |40-pin          |3M-3417-7000
 Connector  |40-pin          |3M-3448-2040
 Flat cable |AWG28 (stranded)|3M-3365-40


SEAGATE ST3780A/ST31220A PRODUCT MANUAL 36260-001, DRAFT 10, 6/94

Formatted capacity
The drive was low-level formatted at the factory. You cannot low-
level format it.

The drive was configured in translation mode at the factory. You can
verify the number of cylinders, sectors per track and heads, and the
total number of sectors by using the Identify Drive (ECh) command.

The amount disc space which your system will access depends on the
type of system that you have and on the type of operating system or
third-party installation software that is used to high-level format
ST31220 family drives.

One of two addressing schemes may be used by your computer to access
a hard disc - logical block addressing (LBA) or cylinder-head-sector
addressing (CHS). LBA allows you to access the full capacity of your
hard disc. CHS, which is used on older DOS systems, will limit the
capacity of your hard disc to 1,024 cylinders (approximately 512 MB)

 - You are using third-party installation software which supports more
   than 1,024 cylinders

- You have installed the dual-drive emulation option

 - You have a host adapter (controller card) which supports more than
   1,024 cylinders.

The following equation holds:

(sectors) x (heads) x (cylinders) total sectors per drive

Multisegmented cache buffer
The drive uses the 256-Kbyte multisegmented cache buffer to improve
performance by eliminating access times under certain conditions.

Read look-ahead
The drive uses the read segments to store additional logical sectors,
after the last requested sector, into a buffer before the additional
sectors are requested by the computer. The cache buffer stores data
from the start of a read until the buffer segment is full or until
another command is received.

Write immediate
The drive uses the write segment to store write commands and data.
After the drive receives all of the data for the command, it issues
a write complete. Then, the drive writes the data to the disc.

Write merging
The drive accepts contiguous write commands and executes them as one

PIO and DMA Data Transfer Modes
You can use the Set Features command to set the type of data transfer
mechanism and transfer mode used by the drive. To do this:

 1. Write Set Features command value 03H (Set Data Transfer mode) to
    the Features register.

 2. Write a transfer types value to the Sector Count register. The
    upper 5 bits of this value define the type of data transfer, and
    the low order 3 bits encode the mode value. The following table
    identifies allowable transfer types values:

  |Data transfer mechanism                 | Transfer types value  |
  |Mechanism name               |Mode value|Data Upper|Lower 3 bits|
  |                             |          |5 bits    |            |
  |PIO Transfer Mode (default:  |    2     |  00000   |     000    |
  |Set PIO Mode 2               |          |          |            |
  |PIO Transfer Mode: Set PIO   |    2     |  00000   |     001    |
  |Mode 2                       |          |          |            |
  |PIO Flow Control Transfer    |    0     |  00001   |     000    |
  |Mode: Set PIO Mode = 0       |          |          |            |
  |PIO Flow Control Transfer    |    1     |  00001   |     001    |
  |Mode: Set PIO Mode = 1       |          |          |            |
  |PIO Flow Control Transfer    |    2     |  00001   |     010    |
  |Mode: Set PIO Mode = 2       |          |          |            |
  |PIO Flow Control Transfer    |    3     |  00001   |     011    |
  |Mode: Set PIO Mode = 3       |          |          |            |
  |PIO Flow Control Transfer    |    4     |  00001   |     100    |
  |Mode: Set PIO Mode = 4       |          |          |            |
  |Multiword DMA Mode           |    0     |  00100   |     000    |
  |Multiword DMA Mode           |    1     |  00100   |     001    |
  |Multiword DMA Mode           |    2     |  00100   |     010    |
  |RESERVED                     |          |  01000   |     nnn    |
   If the drive does not support a commanded mode, the drive returns
   an Aborted Command error.



Seagate Technology
Technical Support Services
If you need assistance installing your drive, consult your dealer.
Dealers are familiar with their unique system configurations and can
help you with system conflicts and other technical issues. If you
need additional assistance with your Seagate(r) drive or other
Seagate products, use one of the Seagate technical support services
listed below.

SeaFONE at 1-800-SEAGATE (1-800-732-4283)
Seagate's 800 number allows toll-free access to automated self-help
services, providing answers to commonly asked questions,
troubleshooting tips and specifications for disc drives and tape
drives. This service is available 24 hours daily and requires a
touch-tone phone. If you need to speak to a technical support
engineer, dial this number and listen to the options for technical
support. (International callers can also reach this automated
self-help service by dialing 408-456-4496).

Seagate Technology online services
Using a modem, you can obtain troubleshooting tips, free utility
programs, drive specifications and jumper settings for Seagate's
entire product line. You can also download software for installing
and analyzing your drive.

You can obtain technical information on Seagate drives, Seagate
software and much more over the Internet from Seagate's World Wide
Web home page (http://www.seagate.com) or Seagate's ftp server

You may also send E-mail with your questions to DiscSupport@
Seagate.com or TapeSupport@Seagate.com.

SeaBOARD is a computer bulletin board system (BBS) that contains
information about Seagate's disc and tape drive products and is
available 24 hours daily. Set your communications software to eight
data bits, no parity and one stop bit (8-N-1). SeaBOARD phone numbers
are listed in the following table.

BBS Location Modem number
United States Disc: 408-434-1080; Tape: 408-456-4415
England 44-1628-478011
France 33 1-48 25 35 95
Germany 49-89-140-9331
Singapore 65-292-6973
Thailand 662-531-8111
Australia 61-2-9756-2359
Taiwan 886-2-719-6075

Seagate CompuServe forum
Online technical support for Seagate products is available on
CompuServe. To access our technical support forum, type go seagate.
This forum provides information similar to that found on SeaBOARD.
In addition, you can type questions or browse through previous
questions and answers on the forum messages.

Seagate Technology FAX services
You can use a touch-tone telephone to access Seagate's automated FAX
system to receive technical support information by return FAX. This
service is available 24 hours daily.
Location Telephone number
United States 1-800-SEAGATE or 408-456-4496
England 44-1628-894084
Australia 61-2-9756-5170

Seagate technical support FAX
You can FAX questions or comments to technical support specialists 24
hours daily. Responses are sent during business hours.
Location FAX number
United States 408-944-9120
England 44-1628-890660
France 33 1-46 04 42 50
Germany 49-89-1430-5100
Australia 61-2-9725-4052
Singapore 65-293-4722
Hong Kong 852-2368 7173
Taiwan 886-2-715-2923
Korea 82-2-556-7294/4251

Seagate technical support
You can talk to a technical support specialist during business hours
Monday through Friday for one-on-one technical help. Before calling,
note your system configuration and drive model number (STxxxx). There
are several technical support phone numbers available for various
Seagate products.

 Location          Telephone  number
 United States Please dial 1-800-SEAGATE for the specific product
               telephone number.
               (6:00 A.M. to 11:15 A.M., 12:30 P.M. to 5:00 P.M.,
               Pacific time, M-F)
 England       44-1628-894083 (10:00 A.M. to 1:00 P.M., 2:00 P.M. to
               5:00 P.M., M-F)
 France        33 1-41 86 10 86 (9:30 A.M. to 12:30 P.M., 2:00
               P.M. to 5:00 P.M., M-F)
 Germany       Disc: 49-89-140-9332; (9:30 A.M. to 12:30 P.M., 2:00
               P.M. to 4:00 P.M., M-F)
               Tape: 49-89-140-9333
 Australia     61-2-9725-3366 (9:00 A.M. to 5:00 P.M., M-F)
 Singapore     65-290-3998 (9:00 A.M. to 12:00 P.M., 2:00
               P.M. to 5:00 P.M., M-F)
 Hong Kong     852-2368 9918
 Taiwan        886-2-514-2237
 Korea         82-2-556-8241

SeaTDD 408-944-9121
Using a telecommunications device for the deaf (TDD), you can send
questions or comments 24 hours daily and exchange messages with a
technical support specialist between 6:00 A.M. to 11:15 A.M. and
12:30 P.M. to 5:00 P.M. (Pacific time) Monday through Friday.

Customer Service Centers
Seagate direct OEM, Distribution, System Integrator and Retail
customers should contact your Seagate Service Representative for
warranty information. Other customers contact your place of
purchase. Seagate offers comprehensive customer support for all
Seagate drives. Seagate customer service centers are the only
facilities authorized to service Seagate drives. These services are
available worldwide.

Location Telephone number FAX number
United States 1-800-468-3472; 405-949-6740
Other Americas
(Canada & Brazil) 405-949-6706; 405-949-6738
Mexico 525-546-6965; 525-546-4888
Europe, Middle
East & Africa 31-2065-43300; 31-2065-34320
Asia Pacific &
Australia 65-485-3595; 65-485-4980
Japan 81-3-5462-2904; 81-3-3462-2979

Seagate, Seagate Technology and the Seagate logo are registered
trademarks of Seagate Technology, Inc. SeaFAX, SeaFONE, SeaBOARD,
SeaTDD, SeaNET, Medalist and DiscWizard are either trademarks or
registered trademarks of Seagate Technology, Inc. or one of its
subsidiaries. All other trademarks or registered trademarks are the
property of their respective owners.

previous page: Hard Drive: SEAGATE: ST3120A 107MB 3.5"/SL    IDE / AT
page up: Hard Drive Specs from SEAGATE
next page: Hard Drive: SEAGATE: ST31230DC 1060MB 3.5"/SL    SCSI2 WIDE