
D F M S - 3 1 0 8 0 S   U L T R A S T A    IBM
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        |     |     |
Capacity form/unform  1320/      MB        Heads           4|     |     |
Seek time   / track   9.0/     ms          Sector/track     |     |     |
Controller           SCSI2 SI/FAST         Precompensation
Cache/Buffer           512 KB DUAL-PORTED  Landing Zone
Data transfer rate    7.650 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     PRML                           operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 65
Power: sleep              W     Humidity     %         5 90    |      5 95
       standby            W     Altitude    km    -0.304  3.048| -0.304 12.192
       idle               W     Shock        g        10       |     60
       seek               W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit   ON THE FLY
                                MTBF         h    1000000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CISPR22,CSA,EEC,FCC,IEC950...

**********************************************************************
                        L   A   Y   O   U   T
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IBM      DFMS-S1X/S2X/S3X/S4X/S5X  ULTRASTAR PRODUCT DESCRIPTION

    68-Pin SCSI (Rear View)
    +-----------------------------------------------------+
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |++---------SCSI-----------------+-Aux.---+-Power---++|
    ||| +------------------------1-+ |+-----1+|+-------+|||
    ||| |\::::::::::::::::::::::::/| ||::::::|||XXXXXXX||||
    ||| +--------------------------+ |+-----2+|+-------+|||
    ||+------------------------------+Connect.+-4-3-2-1-+||
    ++                                                   ++

    50-Pin SCSI (Rear View)
    +-----------------------------------------------------+
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |++---------SCSI--------------------------+-Power---++|
    ||| +-----------------------------------1+|+-------+|||
    ||| |::::::::::::::::::::::::::::::::::::|||XXXXXXX||||
    ||| +------------------------------------+|+-------+|||
    ||+---------------------------------------+-4-3-2-1-+||
    ++                                                   ++



    80-Pin SCSI (Rear View)
    +-----------------------------------------------------+
    |                                                     |
    |                                                     |
    |                                                     |
    |         +---------------------------------+         |
    |+--------|/*******************************\|--------+|
    ||        +1--------------------------------+        ||
    ||                                                   ||
    ++                                                   ++

     Jumper Pin locations all models (Front view)
    +-----------------------------------------------------+
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |++------------------+----+--------------------------+|
    |||::::.:::::::::::::| oo |                          ||
    |++------------------+----+--------------------------+|
    ++                                                   ++



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
IBM      DFMS-S1X/S2X/S3X/S4X/S5X  ULTRASTAR PRODUCT DESCRIPTION

 Jumper Setting
 --------------

 Option Jumper Block(s)
 ----------------------
 DFMS models contain a jumper block that can be used to enable certain
 features and select the SCSI ID of the drive. This jumper block is
 referred to as the Front Option Jumper Block due it's location on the
 drive (opposite the SCSI connector). This jumper block varies in pin
 definition based on interface type (50, 68, Differential, SCA). The
 Option Block connector (2 x 16) used on 50 pin models is an AMP
 connector (P/N 84156-4) having a pin spacing of 2mm.

 The Option Block connector (2 x 16) used on the 68 and 80 pin models
 is an AMP connector (P/N 84156-5) having a pin spacing of 2mm.
 68-pin models also contain a rear option jumper block that replicates
 some of the functions contained in the front block.

                                                   Termination
                                                   Power Enable
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+
 |1*|03|05|07|xx|11|13|15|17|19|21|23|25|27|29|31| |  |  |
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |01|02|
 |2*|04|06|08|10|12|14|16|18|20|22|24|26|28|30|32| |  |  |
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+
 *NOTE: PINS 1 AND 2 DO NOT EXIST IN 50-PIN MODELS!


 Alternate Mode
 --------------

    Option Block Mode (Jumper shown selecting Option Block Mode)
     |
     |      BIT
     |   3  2  1  0
  --++-+-++-++-++-++ +--+--+
    |XX|25|27|29|31| |  |  |
   -+XX+--+--+--+--+ |01|02|
    |XX|26|28|30|32| |  |  |
    +--+--+--+--+--+ +--+--+
     +--+---+--+--+
         Ground

 Option Block Mode Pin
 ---------------------
 The Option Block Mode pin is used to modify the function of the Front
 Option Jumper Block. When the Option Block Mode Pin is not grounded
 the pin function of the front Option Jumper Block will be as defined
 by the upper portion of the referenced figures. When the Option Block
 Mode Pin is grounded the pins (25, 27, 29, 31) will be redefined to
 control what is referred to as Alternate Mode. Alternate Mode allows
 tailoring of SCSI options such as boot up characteristics and other
 operational features on a per customer basis.


 50/68 Pin Model Single Ended
 ----------------------------
 Pin| Description
 ---+---------------------------------------------------------
 01 | Bit 3 (MSB) (Do not exist in 50-pin models)--+
 03 | Bit 2                                      --+   Address
 05 | Bit 1                                      --+   Jumpers
 07 | Bit 0 (LSB)                                --+
 09 | Blank Polarity
 10 | Unused
 11 | Auto Start
 13 | +5V
 14 | Enable Active Termination
 15 | -Master Sync
 16 | -Slave Sync
 17 | External Activity LED
 18 | +5V
 19 | Write Protect
 21 | Auto Start Delay
 23 | Option Block Mode
 25 | Disable T.I. Sync Negotiations
 27 | Disable SCSI Parity
 29 | Disable Unit Attention
 31 | Customizing


 50/68 Pin Model Differential
 ----------------------------
 Pin| Description
 ---+---------------------------------------------------------
 01 | Bit 3 (MSB) 68-pin models only             --+
 03 | Bit 2                                      --+   Address
 05 | Bit 1                                      --+   Jumpers
 07 | Bit 0 (LSB)                                --+
 09 | Blank Polarity
 10 | Unused
 11 | Auto Start
 13 | +5V*
 14 | Unused*
 15 | -Master Sync
 16 | -Slave Sync
 17 | External Activity LED
 18 | +5V
 19 | Write Protect
 21 | Auto Start Delay
 23 | Option Block Mode
 25 | Disable T.I. Sync Negotiations
 27 | Disable SCSI Parity
 29 | Disable Unit Attention
 31 | Customizing

 * Pin 13 is Enable Narrow Mode on 80Pin SCA and 68Pin differential
   Pin 14 is Ground on 80Pin SCA and 68Pin differential

 NOTE
 Pins 2, 4, 6, 8, 12, 20, 22, 24, 26, 28, 30 and 32 are Ground.


 68Pin Auxiliary Connector
 -------------------------
   +----------------- +5V
   |  +-------------- Enable Active Termination
   |  |  +----------- SCSI ID 3
   |  |  |  +-------- SCSI ID 2
   |  |  |  |  +----- SCSI ID 1
   |  |  |  |  |  +-- SCSI ID 0
  ++-++-++-++-++-++-+
  |11|09|07|05|03|01|
  +--+--+--+--+--+--+
  |12|10|08|06|04|02|
  ++-++-++-++-++-++-+
   |  |  |  |  |  +-- Unused
   |  |  |  |  +----- Auto Spin Start
   |  |  |  +-------- Slave Sync
   |  |  +----------- External Activity LED
   |  +-------------- Ground
   +----------------- Write Protect

 The 68Pin models contain an Auxiliary connector that replicates some
 of the functions contained in the Front Option Jumper Block. The
 Auxiliary connector signal definitions conforms to the SCSI document
 SFF-8009 Rev. 2 with the following exceptions:

 1. EXTERNAL FAULT (XTFALT-) is not supported on pin 2.

 2. AUTO SPIN START was chosen as the vendor unique'signal assignment
    (on pin 4). (This signal is an input to the drive. The SCSI spec
    (SCSI SFF-8009) specifies this pin as an output.) This signal
    should be useful for those applications that want to auto-start
    the drive based on location dependent SCSI ID.
    This pin should be handled in one of the following ways:
    a. tied to ground (auto spin start enabled)
    b. allowed to float (no connection)
    c. drive with an open collector driver (>1mA sink capability)


 50-Pin SCSI ID
 --------------
   +----------+-----------------------+
   | SCSI ID  | MSB             LSB   |
   |          | Bit 2 | Bit 1 | Bit 0 |
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    1     | OPEN  | OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    2     | OPEN  | CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    3     | OPEN  | CLOSED| CLOSED|
   +----------+-------+-------+-------+
   |    4     | CLOSED| OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    5     | CLOSED| OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    6     | CLOSED| CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    7     | CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+


 68-Pin SCSI ID
 --------------
   +----------+-------------------------------+
   | SCSI ID  |       Jumper Location         |
   |          |             PINS              |
   |          | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
   +----------+-------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+-------+
   |    1     | OPEN  | OPEN  | OPEN  | CLOSED|
   +----------+-------+-------+-------+-------+
   |    2     | OPEN  | OPEN  | CLOSED| OPEN  |
   +----------+-------+-------+-------+-------+
   |    3     | OPEN  | OPEN  | CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+
   |    4     | OPEN  | CLOSED| OPEN  | OPEN  |
   +----------+-------+-------+-------+-------+
   |    5     | OPEN  | CLOSED| OPEN  | CLOSED|
   +----------+-------+-------+-------+-------+
   |    6     | OPEN  | CLOSED| CLOSED| OPEN  |
   +----------+-------+-------+-------+-------+
   |    7     | OPEN  | CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+
   |    8     | CLOSED| OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+-------+
   |    9     | CLOSED| OPEN  | OPEN  | CLOSED|
   +----------+-------+-------+-------+-------+
   |   10     | CLOSED| OPEN  | CLOSED| OPEN  |
   +----------+-------+-------+-------+-------+
   |   11     | CLOSED| OPEN  | CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+
   |   12     | CLOSED| CLOSED| OPEN  | OPEN  |
   +----------+-------+-------+-------+-------+
   |   13     | CLOSED| CLOSED| OPEN  | CLOSED|
   +----------+-------+-------+-------+-------+
   |   14     | CLOSED| CLOSED| CLOSED| OPEN  |
   +----------+-------+-------+-------+-------+
   |   15     | CLOSED| CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+


 Auto Start (& Delay) Pins
 -------------------------
 The Auto Start and Auto Start Delay pins control when and how the
 drive can spin up and come ready. When configured for Auto-Startup,
 the motor spins up after power is applied without the need of a SCSI
 Start Unit command. For no Auto-Start, a SCSI Start Unit command is
 required to make the drive spin and be ready for media access
 operations. When in Auto-Start mode, the drive will delay it's start
 time by a period of time multiplied by it's own SCSI address.

 Pins (50 and 68 interface pin models)
   +----------+----------+----------+-----+
   |Auto Start|Auto Start|Auto-Start|Delay|
   |Delay     |          |Mode ?    |(sec)|
   +----------+----------+----------+-----+
   |OPEN      |OPEN      |NO        | NA  |
   +----------+----------+----------+-----+
   |OPEN      |CLOSED    |YES       |  0  |
   +----------+----------+----------+-----+
   |CLOSED    |OPEN      |YES       | 10  |
   +----------+----------+----------+-----+
   |CLOSED    |CLOSED    |YES       |  4  |
   +----------+----------+----------+-----+
 Auto-Startup Modes selectable by Auto-Start/Delay Pin Combinations

 Pins (80 interface pin models)
   +----------+----------+----------+-----+
   |Auto Start|Auto Start|Auto-Start|Delay|
   |Delay     |          |Mode ?    |(sec)|
   +----------+----------+----------+-----+
   |OPEN      |OPEN      |YES       |  0  |
   +----------+----------+----------+-----+
   |OPEN      |CLOSED    |NO        | N/A |
   +----------+----------+----------+-----+
   |CLOSED    |OPEN      |YES       | 10  |
   +----------+----------+----------+-----+
   |CLOSED    |CLOSED    |NO        | N/A |
   +----------+----------+----------+-----+
 Auto-Startup Modes selectable by Auto-Start/Delay Pin Combinations


 External Activity (LED) Pins
 ----------------------------
 The LED pins can be used to drive an external Light Emitting Diode.
 Up to 33 mA (  5%) of TTL level LED drive capability is provided.
 Current limiting for the LED is provided on the electronic card. The
 LED Anode may be tied to the +5V source provided on pin 18 of the
 Front Option Jumper block, pin 11 of the Auxiliary connector on the
 68-pin. Unitized connector or the +5V power source provided on the
 80-pin SCA model. The LED cathode is then connected to the EXTERNAL
 ACTIVITY Pin to complete the circuit.

 NOTE
 This set of pins can be used to drive an LED located in a bezel
 connected to the front of the drive or to an external LED in systems
 where the front of the drive can not be easily seen.

 NOTE
 68/80 pin SCSI models have two sets of pins, a set on the front and a
 set on the back, that are connected to the same LED driver circuit.
 The combined drive capability is stated above.


 Write Protect Pins
 ------------------
 If the Write Protect pin is jumpered to ground the drive will
 prohibit SCSI commands that alter the customer data area portion of
 the media from being performed. The state of this pin is monitored on
 a per command basis.


 Disable T.I.Sync. Negotiation Pins
 ----------------------------------
 If a Disable Target Initiated Synchronous Negotiation pin is grounded
 then an Initiator is required to start a negotiation handshake if
 Synchronous and/or Wide (Double Byte) SCSI transfers are desired.


 Disable SCSI Parity Pins
 ------------------------
 Grounding this pin will disable SCSI Parity checking.


 Disable Unit Attention Pins
 ---------------------------
 Grounding this pin will disable the drive from building Unit
 Attention Sense information for commands immediately following a
 Power On Reset (POR) or SCSI Bus Reset. Any pending Unit Attention
 conditions will also be cleared at POR or SCSI Reset times.


 Customizing Pin
 ---------------
 The customizing pin is currently reserved for future use.


 Enable Narrow Mode
 ------------------
 Jumpering pin 14 to pin 13 will cause the 68 pin Differential or the
 80 pin SCA to operate in a Single Byte mode. The drive will not
 negotiate for Wide (Double Byte) operation. The drive will terminate
 the unused upper byte and upper byte parity on the SCSI Bus.


 Enable Active Termination
 -------------------------
 Upon request, Single Ended 50 and 68 pin models are available with on
 card SCSI bus Active terminators. For those cards having the Active
 Termination feature, this function can be enabled by installing a
 jumper between pins 13 and 14 of the Front Option Jumper Block or
 connecting pins 9 and 11 of the Auxiliary Connector on 68 SCSI pin
 models.


 SCSI Bus Termination Power
 --------------------------
 Termination Power is optionally provided for systems that desire to
 use it. In order to use the termination power, the user needs to
 install a jumper between pins 01 and 02 of the TermPower Block. The
 jumper should only be installed on one device, which should be the
 last device on the SCSI bus (i.e. the drive that is phydically
 closest to a terminator). 68 pin models can source up to 2.0 Amps of
 current at 5.0 Volts ( 5%) for termination power. 50 pin models can
 source up to 1.5 Amps of current at 5.0 Volts ( 5%) for termination
 power.



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                      I   N   S   T   A   L   L
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IBM      DFMS-S1X/S2X/S3X/S4X/S5X  ULTRASTAR PRODUCT DESCRIPTION

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

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

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

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


 Mounting
 --------
 The drive can be mounted with any surface facing down.

 The drive has both side and bottom mounting holes.

 The maximum allowable penetration of the mounting screws is 3.8 mm.

 The torque applied to the mounting screws must be 0.5 Newton-meters
   0.1 Newton-meters.


 Clearances
 ----------
 A minimum of 2 mm clearance should be given to the bottom surface
 except for a 10mm diameter area around the bottom mounting holes. For
 proper cooling it is suggested that a clearance of 6 mm be provided
 under the file and on top of the file.

 NOTE
 The top of the drive will not exceed the height dimensions by more
 than 2 millimeters during a non-operating shock.


 Power Connector
 ---------------
 The DC power connector used on all models (50, 68 and 80 pin SCA) are
 an integral portion of the 50/68 pin SCSI Unitized Connectors or the
 80 pin Single Connector Attachment (SCA) Connector.

   +------------+   pin 1    +12 VDC
   | 4  3  2  1 |   pin 2    +12 Volts Return
   +------------+   pin 3    + 5 Volts Return
                    pin 4    + 5 VDC


 50-Pin SCSI Bus Connector
 -------------------------
 50-pin models use an AMP PN 84160-1. The connector is compatible with
 the ANSI SCSI "A" connector specifications. It is limited to 8 bit
 data transfers only.


 68-Pin SCSI Bus Connector
 -------------------------
 68-pin models use an AMP 786963-1 that is compatible with the ANSI
 SCSI "P" connector specifications. It can transfer data in both 8 bit
 (narrow) and 16 bit (wide) modes.

 NOTE
 Note that the "P" connector is not mechanically compatible with the
 50-pin "A" connector as defined in the ANSI SCSI-2 standard.
 Therefore system cables used with 50 pin products cannot be plugged
 directly into the 68 pin models.

 Despite the difference in connector, the differential 68-pin models
 are electrically compatible with differential 50-pin models and other
 50-pin differential SCSI products and therefore can coexist on the
 same bus. In order to do so, the differences in connector types would
 need to be accounted for in the cable. The same can be said for
 connecting 68 and 50 pin single-ended models to the same bus.


 80 Pin (Single Connector Attachment) Connector
 ----------------------------------------------
 80 pin SCA models use a Molex connector (PN 87091-0001) that is
 compatible with the specification of Single Connector Attachment for
 Small SCSI Disk Drives. It can transfer data in both 8 bit (narrow)
 and 16 bit (wide) modes.

 NOTE
 That the SCA connector is not mechanically compaible with the 50 pin
 A connector or the 68 pin P connector as defined in the ANSI SCSI
 standard. This connector is intended for direct backplane attachment
 and is not intended to be cable attched to the bus.


 SCSI Bus Cable
 --------------
 Single-ended models permit cable length of up to 6 meters (19.68
 feet). It should be noted however that users who plan to use "Fast"
 data transfers with single-ended models should follow all of the
 SCSI-3 guidelines for single-ended "Fast" operations. This may
 include a cable length of less than 6 meters.

 SCA connector models are not designed for direct cable attachment due
 to the combination of power and SCSI bus signals. Fast data transfers
 with SCA models should follow of the ANSI SCSI guidelines for single
 ended Fast operations.

 Differential models permit cable length of up to 25 meters (82.02
 feet). Cables must meet the requirements for differential cables as
 set forth in the ANSI SCSI-2 standard under "Cable Requirements -
 Differential Cable".

 The ANSI SCSI standard states that any stub from main cable must not
 exceed 0.1 meters for single-ended cables and 0.2 meters for
 differential cables. DFMS has a maximum internal stub length of 0.03
 meters on all single-ended, and 0.1 meters on all differential SCSI
 signals. To remain compliant with the standard, the SCSI bus cable
 must not add more than 0.05 meters additional stub length to any of
 the single-ended SCSI signals or 0.1 meters to any differential SCSI
 signals.


 SCSI Bus Terminators (Optional)
 -------------------------------
 For those cards having the Active Termination feature this function
 can be enabled by installing a jumper between pins 13 and 14 of the
 Front Options Jumper Block or pins 9 and 11 of the Rear Block on 68
 pin models. The using system is responsible for making sure that all
 required signals are terminated at both ends of the cable.

 80 pin SCA models do not have internal SCSI bus terminators. Some
 external terminator possibilities for single-ended cables systems are
 listed in the following Table.

 +-------------------------+-------------------------+
 |50 Pin Model Terminators | 68 Pin Model Terminators|
 +-------------------------+-------------------------+
 |Data Mate DM550-06-0     | Data Mate DM5000 68689  |
 |Data Mate DM1050-02-0    | Data Mate DM2050-02-685 |
 +-------------------------+-------------------------+

 Differential models do not have internal SCSI bus terminators. Some
 terminator possibilities are listed in the following Table.

 +-------------------------+-------------------------+
 |50 Pin Model Terminators | 68 Pin Model Terminators|
 +-------------------------+-------------------------+
 |Data Mate DM550-05-0     | Data Mate DM2050-01-68D |
 |Data Mate DM1050-06-0    | Data Mate DM5000 686510 |
 +-------------------------+-------------------------+
 NOTE
 A Meritec model 940900-4 or a DataMate DM5000-5068-11 can be used to
 connect the 68 pin connector on a SxW drive for use with a 50 pin
 connector. The drive will now perform 8 bit transfers.


 Recommendations For SCSI Bus Noise Reduction
 --------------------------------------------
 The SCSI commitee has spent a large amount of resource looking into
 what needs to be done to assure SCSI devices will work as specified
 in the SCSI-2 standard. As a result of this, the committee is
 recommending the following approach:

 1. Use the regulated 110 ohm terminator
 2. Use AWG 28 polyolefin shielded cables
 3. Make sure data and parity are on the outer ring of the cable and
    that REQ and ACK are in the core of the cable.


 Spindle Synchronization Oberview
 --------------------------------
 There are four modes of spindle synchronization. The following
 paragraphs give a short description of each spindle synchronization
 mode:

 - The Slave drive (Slave Sync mode) receives the index from the
   Master drive on the -SLAVE SYNC line and synchronizes its INDEX
   (Slave index) to it.
 - Should the drive be the Master drive, (Master Sync mode), it out-
   puts its INDEX on the -MASTER SYNC and the -SLAVE SYNC lines. The
   Master drive does not synchronize its index to any other device.
   It simply outputs its INDEX.
 - In the Master Sync Control mode, a drive will synchronize its
   spindle to the signal it receives on the -SLAVE SYNC input. It out-
   puts to -MASTER SYNC a pulse that has the same period as the drive
   INDEX, but is not synchronized to the drive INDEX generated from
   the disk.
 - In the non-sync mode, the drive will receive the -Slave SYNC
   signal, but it is not used by the drive.

    Spindle Synchronization Control Lines
   +------------+-----------+-------------------+
   |-MASTER SYNC|-SLAVE SYNC|function mode      |
   +------------+-----------+-------------------+
   |released    |receive    |Slave sync         |
   |drive       |drive      |Master sync        |
   |drive       |receive    |Master Sync Control|
   |released    |receive    |non sync           |
   +------------+-----------+-------------------+

 - File Synchronization with Offset
   The file electronics receives the Master Index and creates the
   delayed Slave Index from the drive INDEX. The delay is determined
   by using the Mode select command, Rigid Disk Drive Geometry
   Parameters (page 4). A rotational offset of 0/256 of a revolution
   up to 255/256 of a revolution may be selected in increments of 1/
   256 of a revolution.

 - Synchronization Time
   The SCSI MODE Slect command is used to select the Spindle Sync.
   mode. It could take up to 3 seconds (1.5 sec. nominally) to
   synchronize the Slave drive to the Master drive. While the Slave
   drive is synchronizing to the Master, it will not be able to read
   and write data. Once synchronized, the drive will maintain   20
   usec synchronization tolerance.


 Spindle Synchronization Bus
 ---------------------------
 The spindle synchronization Bus consists of the two signal lines,
 -MASTER SYNC and -SLAVE SYNC.

 - Termination
   Bus termination of the -MASTER SYNC and -SLAVE SYNC signals is
   internal to the file. These two signals each have a 2000 ohm
   pullup to the +5 volt supply. A maximum of 16 files can have their
   -MASTER SYNC or -SLAVE SYNC lines daisy chained together. Violating
   this could damage the Master file driver on the -MASTER SYNC and/or
   -SLAVE SYNC line.


 - Bus Characteristics
   - maximum Bus length = 6 meters
   - 1 micro-seconds negative active pulse
   - 0.8 volts = valid low input
   - 2.2 volts = valid high input
   - 0.4 volts = low output
   _ Vcc volts = high output
   - 60 milli-amps = maximum output low level sink current

   The driver used for these two signal lines is an open collector
   buffer.


 Hot plug/unplug support
 -----------------------
 Power supply and SCSI bus hot plug and un-plug is allowed. There is
 no special sequence required for connecting 5 volts, 12 volts, or
 ground. During a hot plug-in event the file being plugged will draw a
 large amount of current at the instant of plug-in. This current spike
 is due to charging the bypass capacitors on the file. This current
 pulse may cause the power supply to go out of regulation. If this
 supply is shared by other files then a low voltage power on reset may
 be initiated on those files. Therefore the recommendation for hot
 plugging is to have one supply for each file. Never daisy chain the
 power leads if hot plugging is planned. Hot plugging should be
 minimized to prevent wear on the power connector.

 Hot plugging the SCSI bus may cause glitches on the bus. To minimize
 the chance of glitching, it is recommended to plug in the SCSI bus
 before the power is applied.

 During hot plugging, the supplies must not go over the upper voltage
 limit. This means that proper ESD protection must be used during the
 plugging event.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
IBM      DFMS-S1X/S2X/S3X/S4X/S5X  ULTRASTAR PRODUCT DESCRIPTION


 Features
 --------
 - Industry-standard interface: ANSI/SCSI-2, single-ended
   68 pin ANSI SCSI-3, single-ended/differential
   80 pin SCA

 - Magnetoresistive (MR) heads

 - PRML data channel

 - read-ahead caching

 - No preventative maintenance required

 - Spindle synchronization

 - Write cache supported

 - ECC on the fly


 SCSI Bus Termination Power Short Circuit Protection
 ---------------------------------------------------
 The ANSI SCSI-2 specification recommends for devices that optionally
 supply TERMPWR, to include current limiting protection for accidental
 short circuits. It also recommends that the maximum current available
 for TERMPWR should not exceed 5 Amps. UL has a different requirement
 that they call the 8 Amp rule. This rule states that when a power
 source leaves an enclosure (like SCSI TERMPWR in the SCSI cable), it
 must trip 8 Amps of current within 1 minute.

 The drive limits current to 5.0 amps through the use of a permanent
 fuse mounted on the electronics card. Systems may also provide short
 circuit protection for drive supplied TERMPWR by limiting the current
 of the 5V power is supplies to the drive.


 Grounding Requirements of the Disk Enclosure
 --------------------------------------------
 The disk enclosure is at Power Supply ground potential. It is
 allowable for the user mounting scheme to common the Disk Enclosure
 to Frame Ground potential or leave it isolated from Frame Ground. The
 drive's mounting frame must be within   150 millivolts of the drive's
 power supply ground. At no time should more than 35 milliamps of
 current (0 to 100 Mhz) be injected into the disk enclosure.



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                      G   E   N   E   R   A   L
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IBM       SCSI INSTALLATION

 SCSI Installation Guide Generic

 Installation requirements
 -------------------------
 To install a drive inside your computer or in an external storage
 enclosure for SCSI devices, you must have:

 1 The documentation that came with your computer or storage
   enclosure.

 2 The documentation that came with your hard drive.

 3 A small, flat blade screwdriver.

 4 A SCSI controller, which is either built into the system board or
   on an adapter inside your computer.

 5 An installation kit, if it is required for your computer. Contact
   your place of purchase if you are not sure.

 6 If you are installing this into a PS/2 computer, you will also need
   the up-to-date backup copy of your reference diskette and
   diagnostic diskette.

 WARNING: Do not open the static-protective bag containing the drive
 until instructed to do so. Static electricity can damage the drive.


 Hardware and software considerations
 Operating system
 ----------------
 The operating system and hardware are two of the factors that
 determine the number of drives a computer can support. The manuals
 for your computer and operating system can help you to determine the
 number and type of hard disk drives you can use.


 Power supply
 ------------
 Two factors that determine the number of internal drives that a
 computer or SCSI storage enclosure can support are:

 1 The available current of the power supply

 2 The nominal operating current of each drive installed

 Most computer power supplies have output over-current protection. If
 the total allowed current is exceeded, the power supply shuts down.
 The computer must be turned off and turned on again.

 SCSI ID Each SCSI device connected to a SCSI adapter must be assigned
 a unique SCSI identification number (ID). The ID you assign to this
 device depends on the number of SCSI devices connected to the SCSI
 adapter and the SCSI IDs already assigned to those devices.

 Note: All IBM SCSI controllers support SCSI IDs 6 through 0. (ID 7 is
 used for the SCSI controller.) Some SCSI controllers support SCSI IDs
 15 through 8. If your SCSI controller supports more than seven
 devices, then you can use SCSI IDs 15 through 8. If you are not sure
 if your SCSI controller supports more than seven devices, refer to
 the documentation that came with your SCSI controller for
 information.

 If you have an IBM PS/2 computer, you can view your SCSI ID settings
 by accessing the system programs. From the main menu, select Set
 configuration. The select Set and view SCSI configuration.
 Other computers might have utility programs that enable you to view
 the SCSI configuration, or you might have to physically inspect the
 installed SCSI devices to see how the IDs are set. For more
 information, refer to the documentation that came with your computer
 or SCSI controller.


 Handling precautions
 --------------------
 1 Turn off all attached devices first; then turn off the computer.

 2 Unplug all the power cords from electrical outlets before starting
   installation.

 3 Disconnect all power cables from your computer and attached devices
   before starting installation.

 4 Limit your movement. Movement can cause static electricity to build
   up around you.

 5 Handle the drive carefully and by the edges.

 6 Do not touch any exposed printed circuitry.

 7 Prevent other people from touching the components or the drive.

 8 When you are installing the drive, touch the static-protective
   package containing the drive to a metal expansion-slot screw or
   other unpainted metal surface on the computer, for at least 2
   seconds. (This drains static electricity from the package and your
   body.)

 9 When possible, remove the drive and install it directly into the
   computer without setting it down. If this is not possible, place
   the drive, component side up, on the static-protective bag on a
   flat surface until the drive is installed.

 10 Do not place the drive on the computer cover or on a metal table.


 Installing the drive
 --------------------
 These instructions guide you as you install the drive inside your
 computer or storage enclosure.

 Step 1. Setting the jumpers and terminators

 Note: Be sure you have chosen the SCSI ID before continuing. If you
       did not yet choose the SCSI ID, go to "SCSI IDs" above, then
       return here. Follow these steps to set the SCSI ID to match
       your chosen SCSI ID.

 1 Touch the static-protective bag containing the drive to a metal
   expansionslot cover on the computer. This drains any static
   electricity from the package and your body.

 2 Remove the drive from the static-protective bag, holding the drive
   by the edges. Do not touch any exposed components on the drive.

 3 Place the drive on the bag, on a flat surface.

 4 When the Auto Start feature is enabled, the hard disk drive motor
   starts as soon as the computer is turned on. Locate the Auto Start
   jumper by referring to the documentation that came with your drive.
   If the Auto Start jumper is not in place, the hard disk is started
   by a command from the SCSI controller. For drives installed in
   IBM computers or storage enclosures ensure that this jumper is off.
   The hard disk drive is started in a staggered sequence. This
   reduces the start-up load on the power supply. For non-IBM
   computer, refer to the documentation that came with your
   computer for further information.

 5 Set the SCSI ID that you selected. To remove a jumper, pull it
   straight off. To install a jumper, line up the two holes in the
   jumper with the appropriate two pins on the drive. Then push the
   jumper onto the pins until it is completely seated and covers
   both pins.

 6 Store any jumpers you do not use in a safe place, in case you need
   to change the SCSI ID for this drive later. WARNING: If you have
   extra jumpers, do not store them on any of the extra pins on the
   connector. Storing them on a set of pins could damage the drive.

 Step 2. Connecting the terminator
 The location of the drive you are installing inside the computer or
 storage enclosure determines whether you need to connect a terminator
 or put a jumper on the Enable Active Termination pins. Read the
 information in the following table to determine if you must install
 the terminator. For more information about termination, refer to the
 documentation that came with your computer.

 Note: A SCSI chain of devices consists of multiple SCSI devices
 connected by a SCSI cable to a SCSI controller.

 If the hard disk drive is:                   Then:
 The last physical device on a SCSI chain of  Install the terminator
 devices inside the computer.

 The last physical device on a SCSI chain of  Install the terminator
 devices inside an external storage enclosure.

 Step 3. Enabling term power
 If your drive has a jumper for term power and your SCSI controller is
 suppling term power, (check with the manufacturer of your controller)
 then you do not need to enable the term power. The jumper should be
 off. For help in locating the term power jumper, refer to the
 documentation that came with your drive.

 Step 4. Installing the drive
 For the specific information on installing a hard disk drive, refer
 to the documentation that came with your computer. You will be
 required to mount the drive inside your computer, and connect signal
 and power cables to the hard drive. When installed in an enclosure,
 the drive is attached by cable to the external connector of a SCSI
 controller. The controller can be either on a SCSI adapter or built
 into the system board inside of your computer.

 Note: Be sure to use the correct screws provided with your drive.
 Using the wrong ones might cause damage to the drive.

 Step 5. Completing the installation procedure
 The installation of the drive is complete. Reinstall the cover on the
 computer or storage enclosure. Store these instructions and any extra
 parts in a safe place in case you change your configuration.

 After installing your hard disk drive, use the information that came
 with your computer to reconfigure your system. When you power on your
 system, turn on all attached devices first; then turn on the
 computer.

 If you have any problems at this point, turn off all attached
 devices; then, turn off the computer and check that:

 1 The cables are installed correctly

 2 No options or cables are loose

 3 The SCSI ID is properly set

 4 No two SCSI drives have the same SCSI ID

 5 The terminators are properly installed

 Turn on all attached devices; then, turn on the computer. If you
 still have a problem, refer to the troubleshooting information in the
 documentation that came with your computer.

 Step 6. Update configuration
 Whenever you add or remove an option from your computer, you must
 update the configuration information. Your computer might have an
 automatic configuration program, or you might have to follow a
 specific procedure. For more information, refer to the documentation
 that came with your computer.

 Step 7. Preparing the drive for use
 Having successfully installed the hard disk drive, you need to
 prepare it for use. Depending on the operating system you are using,
 you might need to partition then format the hard disk. Refer to the
 documentation that came with your operating system for information on
 how to format your new drive. To make the drive just installed your
 primary drive, you might need to create a new system partition on the
 drive. For information on creating a new system partition, refer to
 the documentation that came with your operating system.


 Troubleshooting
 ---------------
 You might be able to solve a problem yourself. Before calling IBM,
 you might want to try some or all of the following troubleshooting
 procedures.

 1 Remove and reattach all drive cables

 2 Remove and reseat the drive

 3 Place the drive in a different slot, if one is available


 4 If your drive contains jumpers or switches, check that they are set
   as specified

 5 Reread any software instructions; be sure software settings are
   correct

 6 Inspect the drive for damage, such as bent pins

 7 Check the computer manual for instructions about the installation
   of upgrades. Look for a section about system setup or system
   configuration. Follow all procedures.

 8 After completing these steps, reassemble the computer and connect
   the power cord.

 If you are still having problems and want to call IBM technical
 support, have available as much of the following information as
 possible:

 1 Drive model or P/N and description

 2 Computer manufacturer and model

 3 Exact wording of error message (if any)

 4 Description of the problem

 5 Hardware and software configuration information for your system
   If possible, be at your computer. Your technical support rep might
   want to walk you through the problem during the call.


