
1 8 4 0 3 7    COMPAQ
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        | 1024|     |
Capacity form/unform   213/  250 MB        Heads           2|   12|     |
Seek time   / track  14.0/ 5.0 ms          Sector/track     |   34|     |
Controller           IDE / ATA2 FAST/ENHA  Precompensation
Cache/Buffer           120 KB SEGMENTED    Landing Zone
Data transfer rate    4.000 MB/S int       Bytes/Sector      512
                     13.300 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 70
Power: sleep              W     Humidity     %                 |
       standby        0.6 W     Altitude    km                 |
       idle           4.7 W     Shock        g                 |
       seek           4.4 W     Rotation   RPM      3811
       read/write     3.2 W     Acoustic   dBA        33
       spin-up            W     ECC        Bit
                                MTBF         h     300000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates


**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
SEAGATE  ST3491 FAMILY  INSTALLATION GUIDE 36255-002, REV. A

  +---------------------------------------------------------+
  |                                                         |XX Power
  | ++LED                                                   |xx 1
  | ++                                                      |XX
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |                                                         |XX R
  |                                                         |XX F
  |                                                         |XX A
  |                                      8-pin Jumper Block |XX C
  |                                               +----+    |XX E
  |                                               1----+    |X1
  |                                                         |
  |                                                         |XX J3
  |                                                         |XX Power
  +---------------------------------------------------------+  1



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
SEAGATE  ST3491 FAMILY  INSTALLATION GUIDE 36255-002, REV. A, 10/93

 Jumper Setting
 ==============

 8-pin Jumper Block
 ------------------
  +-------+
  |7 5 3 1|
  |8 6 4 2|  ------> FRONT
  +-------+

  +------1+  The drive is a master; the slave is either an ST3491
  |o o o o|  family drive or another ATA-compatible drive, or there is
  |o o o o|  no slave.
  +-------+

  +------1+  The drive is a master; a slave is present but is not
  |o X o o|  ATA-compatible.
  |o X o o|
  +-------+

  +------1+  The drive is a slave to an ATA-compatible master.
  |X o o o|
  |X o o o|
  +-------+

  +------1+  Factory Test (Do not use).
  |X X o o|
  |X X o o|
  +-------+



 DC Power and pin connector assignments
 --------------------------------------
 -------------------+
 --+  +-----J3-----+|  pin 1    +12 VDC
  1|  | 4  3  2  1 ||  pin 2    +12 Volts Return
  -+  \------------/|  pin 3    + 5 Volts Return
  ------------------+  pin 4    + 5 VDC


 3-pin power connector pin 1    + 5 VDC
     +-------+         pin 2    +12 VDC
     | 1 2 3 |Keyway   pin 3    Ground
   --+-------+--



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
SEAGATE  ST3491 FAMILY  INSTALLATION GUIDE 36255-002, REV. A, 10/93

 Notes on Installation
 =====================

 Installation direction
 ----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

 The drive will operate in all axis (6 directions).


 Mounting the drive
 ------------------
 NOTE
 Make sure you mount the drive so that you do not strain the cables.

 All ST3491 family drives have the same overall dimensions. However,
 the positions of the mounting holes are different for metric and
 standard drives.

 - Standard size drives have an "S" stamped on the frame runner and
   accept 6-32 UNC screws.

 - Metric drives have an "M" stamped on the frame runner and accept
   M3 screws.

 Mount the drive securely in the computer in any orientation using
 either the bottom or side mounting holes, as described below.
 Position the drive so that you do not strain or crimp the cables.
 All ST3491 family drives have the same overall dimensions. However,
 the positions of the mounting holes are different for metric and
 standard drives.

 - Standard size drives have an "S" stamped on the frame runner and
   accept 6-32 UNC screws.

 - Metric drives have an "M" stamped on the frame runner and accept
   M3 screws. Caution. To prevent drive mounting hole damage, use
   only the appropriate type of screws as specified. Tighten them
   gently using no more than 6 inch-lb of torque.


 Bottom mounting holes
 ---------------------
 Insert four mounting screws not more than 0.20 inches (6 full turns)
 into the drive frame.

 Bottom mounting holes. Insert four mounting screws not more than
 0.20 inches (6 full turns) into the drive frame.

 Side mounting holes. Insert four mounting screws not more than 0.13
 inches (4 full turns) into the drive frame.

 After you have mounted the drive in the computer, disconnect your
 grounded wrist-strap and replace the computer cover.


 Side mounting holes
 -------------------
 Insert four mounting screws not more than 0.13 inches (4 full turns)
 into the drive frame.

 CAUTION
 To prevent damage to the drive:

 - Use mounting screws of the correct size and length.

 - Gently tighten the mounting screws - do not apply more than 6 inch-
   lbs of torque.



 Storing and shipping your drive
 -------------------------------
 Keep your original box and packing materials for storing or shipping
 your drive. The box has a Seagate Approved Package label. Shipping a
 drive in an unapproved container voids the warranty. Call your
 authorized Seagate distributor to purchase additional boxes.


 Configuring the drive
 ---------------------
 1. Turn the computer off.

 2. Remove your computer's cover.

    Caution
    Special training or tools may be needed to service laptop
    computers. Removing the cover may void your warranty. Review
    the terms and conditions of your warranty before removing the
    cover.

 3. Ground yourself. Wear a grounded wrist strap throughout this
    procedure, or frequently touch the metal chassis of a computer
    that is plugged into a grounded outlet.

 4. Remove the drive from its antistatic bag.

 5. Install master/slave jumpers.
    The master/slave jumper block accepts 2-mm connectors and
    jumpers. Use Seagate part number 13211-001 or equivalent.


 One-drive system
 ----------------
 Configure the drive for a one-drive system.


 Two-drive system
 ----------------
 With two ATA interface drives, you must designate one drive as the
 master, or drive 0, and the other drive as the slave, or drive 1.

 This can be done in either of two ways:
 - When using a standard ATA interface cable (that is, you are not
   using cable select): configure the drive as a master or a slave
   using the options jumper block as shown in Figure 1 on page 4.

 - When using cable select (that is, you have a special cable
   supporting this drive selection method, and your computer and
   both drives all support cable select): first install a jumper on
   pins 3-4 of the options jumper block; then use a drive-select
   cable to designate master and slave drives.


 Attaching cables
 ----------------
 1. Make sure the computer is off.

 2. Put on a grounded wrist strap.

 3. Connect the remote LED (optional).

 4. Attach the power cable. Attach one of the computer power
    cables from the power supply of your computer to the 4-pin
    power connector on the drive.

 5. Attach the interface cable. (Interface ribbon cable length
    must be 18 inches or less.) Caution. Connector misalignment
    can damage the computer and the drive. Ribbon cables are delicate
    - be careful not to crimp or strain them.

 One-drive system using a standard ATA 40-pin interface cable:
 Connect one end of the cable to the computer's host adapter card
 or to the hard drive connector located on the mother-board; connect
 the other end to the 40-pin interface connector. Align pin 1 on each
 cable connector with pin 1 on its matching equipment connector.
 (Cable lead 1 going to connector pin 1 is often denoted by a colored
 edge-stripe on the cable; the stripe will lie adjacent to the 4-pin
 power connector.)

 Two-drive system with a standard ATA 40-pin interface cable: If you
 are using a standard 40-pin two-drive ribbon cable, plug one
 connector into J1 on each drive and attach the remaining connector
 to the host adapter. Align pin 1 on connectors as described above
 for a one-drive system.

 Two-drive system using interface cable supporting cable select: If
 you followed the instructions for two drives and cable-select, you
 must assign master and slave status to drives by the following
 method: to make a drive the master, attach it to the connector
 that has the CSEL signal line connected to pin 28. To make a drive
 the slave, attach it to the connector that has pin 28 unconnected
 (open). Finally, connect the remaining cable connector to the host
 adapter. Note that CSEL is grounded on the host adapter.

 CAUTION
 If you attach the interface cable incorrectly, you could damage the
 computer and the drive.

 If you are installing two drives, use a daisy-chain ribbon cable. The
 ribbon cable should not be longer than 18 inches (0.457 meters).
 Ribbon cables are delicate - be careful not to crimp or strain them.


