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Hard Drive: IBM: 0662-S1D 1052MB 3.5"/SL SCSI2 DIFF

0 6 6 2 - S 1 D    IBM
NO MORE PRODUCED                                      Native|  Translation
Form                 3.5"/SLIMLINE         Cylinders    3002|     |     |
Capacity form/unform  1052/      MB        Heads           5|     |     |
Seek time   / track   8.5/ 1.6 ms          Sector/track     |     |     |
Controller           SCSI2 DI/FAST         Precompensation
Cache/Buffer           512 KB SEGMENTED    Landing Zone
Data transfer rate    5.000 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     PRML 8/9                       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    -0.305  3.048| -0.305 12.192
       idle          10.3 W     Shock        g        10       |     60
       seek               W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA        34
       spin-up            W     ECC        Bit   ON THE FLY
                                MTBF         h     800000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC950,TUV,UL1950,VDE


IBM 0662-S12/S1D/SW1/SWD SPITFIRE VER. 2.1, 41K.011 4/13/1993

    68-Pin SCSI (Rear View)
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    ||| +------------------------1-+ |+------+|+-------+|||
    ||| |\::::::::::::::::::::::::/| ||::::::|||XXXXXXX||||
    ||| +--------------------------+ |+------+|+-------+|||
    ++                                                   ++

    50-Pin SCSI (Rear View)
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    ||| +-----------------------------------1+|+-------+|||
    ||| |::::::::::::::::::::::::::::::::::::|||XXXXXXX||||
    ||| +------------------------------------+|+-------+|||
    ++                                                   ++

     SMD Jumper pin locations (Front view)
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |||::::.:::::::::::::| ++ |                          ||
    ++                                                   ++

     SMP Jumper pin locations (Front view)
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |                                                     |
    |||::::.:::::::| ++ |                                ||
    ++                                                   ++


IBM 0662-S12/S1D/SW1/SWD SPITFIRE 41K.011, VER. 2.1, 4/12/1993

Jumper Setting

Option Jumper Block(s)
SPITFIRE contains a front jumper block with pins that can be used to
access and enable certain features and select the SCSI address of the
drive. For the SMP version of the electronics circuit board, those
functions are split into two groups of pins.

68-pin models also contain a rear option jumper block that replicates
some of the functions contained in the front block.

 Front Options Jumper Block & TermPower Block for SMD Versions
                                                        Power Enable
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+
 |1*|03|05|07|xx|11|13|15|17|19|21|23|25|27|29|31|33|35| |A |A |
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |02|01|
 |2*|04|06|08|10|12|14|16|18|20|22|24|26|28|30|32|34|36| |  |  |
 +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+

 Pin| Description
 01 | Bit 3 (MSB) (Do not exist in 50-pin models)--+
 02 | Ground      (Do not exist in 50-pin models)  |
 03 | Bit 2                                      --+
 04 | Ground                                       +-- Address
 05 | Bit 1                                      --+   Jumpers
 06 | Ground                                       |
 07 | Bit 0 (LSB)                                --+
 08 | Ground
 09 | Blank Polarity
 10 | Unused
 11 | Auto Start
 12 | Ground
 13 | +5V
 14 | Enable Active Termination
 15 | -Master Sync
 16 | -Slave Sync
 17 | LED Cathode
 18 | LED Anode
 19 | Not Connected
 20 | Not Connected
 21 | Write Protect
 22 | Ground
 23 | Not Connected
 24 | Not Connected
 25 | Auto Start Delay
 26 | Ground
 27 | Customizing Pin
 28 | Ground
 29 | Customizing Pin
 30 | Ground
 31 | Disable Unit Attentions
 32 | Ground
 33 | Disable SCSI Parity
 34 | Ground
 35 | Disable T.I.SYNC. Negotiaions
 36 | Ground

 Front Options Jumper Block & TermPower Block for SMP Versions
                                       Power Enable
 +--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+
 |1*|03|05|07|xx|11|13|15|17|19|21|23| |A |A |
 +--+--+--+--+--+--+--+--+--+--+--+--+ |02|01|
 |2*|04|06|08|10|12|14|16|18|20|22|24| |  |  |
 +--+--+--+--+--+--+--+--+--+--+--+--+ +--+--+

 Pin| Description
 01 | Bit 3 (MSB) (Do not exist in 50-pin models)--+
 02 | Ground      (Do not exist in 50-pin models)  |
 03 | Bit 2                                      --+
 04 | Ground                                       +-- Address
 05 | Bit 1                                      --+   Jumpers
 06 | Ground                                       |
 07 | Bit 0 (LSB)                                --+
 08 | Ground
 09 | Blank Polarity
 10 | Unused
 11 | Auto Start
 12 | Ground
 13 | +5V
 14 | Enable Active Termination
 15 | -Master Sync
 16 | -Slave Sync
 17 | LED Cathode
 18 | LED Anode
 19 | Write Protect
 20 | Ground
 21 | Auto Start Delay
 22 | Ground
 23 | Customizing Pin
 24 | Ground

Bottom Options Jumper Block for SMP Versions

   +------------ Disable T.I.SYNC Negotiations
   |  +--------- Disable SCSI Parity
   |  |  +------ Disable Unit Attentions
   |  |  |  +--- Customizing
   +--+--+--+--- GROUND

 Rear Options Jumper Block for 68-pin models
   +----------------- Bit 0
   |  +-------------- Ground
   |  |  +----------- Bit 2
   |  |  |  +-------- +5V
   |  |  |  |  +----- LED Cathode
   |  |  |  |  |  +-- -Master Sync
   |  |  |  |  |  +-- -Slave Sync
   |  |  |  |  +----- LED Anode
   |  |  |  +-------- Enable Active Termination
   |  |  +----------- Bit 3
   |  +-------------- Auto Start
   +----------------- Bit 1

 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  |

 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 SSI 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.
   |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  |

LED Pins
The LED pins be used to drive an external Light Emitting Diode.

Up to 33 mA ( 5%) of TTL level LED drive capability is provided.

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.

68 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 inhibit
SCSI commands that alter the customer data area portion of the media
from being performed.

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 SCSI transfer 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 Pins
The customizing pins and their associated jumper pins are currently
reserved for future use. They are for features specific to particular
host systems that must be in affect immediately after power is
applied to the drive. Please contact your IBM Customer Representative
for functional details on other using system specific features that
these pins could possibly be used for.

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 A01 and A02 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


IBM 0662-S12/S1D/SW1/SWD SPITFIRE 41K.011, VER. 2.1, 4/12/1993

Notes on Installation

Installation direction

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

The drive can be mounted with any surface facing down.

The drive is available with 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 0.8 Newton-meters
   0.1 Newton-meters.

Except for the isolated mounting holes, the body of the file is not
at ground potential. Therefore any user mounting scheme must not re-
sult in the file being shorted to ground.

The file may be sensitive to user mounting implementation due to file
distortion effects. IBM will provide technical support to assist
users to overcome mounting sensitivity.

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.

There should be 7 mm of clearance between the files that are mounted
with their top sides facing each other.

Power Connector
The DC power connector is designed to mate with a Molex 8981-4P4
crimp connector, or a Molex A-70156-2000 insulator displacement
connector, or their equivalent.

   +------------+   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 a Hirose MIF62B-54PB-2.54DS(02) connector on the
SMD versions of the electronics circuit board and a Hirose MIF62C-
54PB-2.54DS on the SMP versions of the electronics. They are both
compatible with the ANSI SCSI-2 "A" connector specifications. It is
limited to 8 bit data transfers only.

68-Pin SCSI Bus Connector
68-pin models use an AMP 92-8012-16-1 connector that is compatible
with the ANSI SCSI-3 "P" connector specifications. It can transfer
data in both 8 bit (narrow) and 16 bit (wide) modes.

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. But
differential and single-ended models do not work connected to the
same 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.

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 SCSI-2 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. SPITFIRE has a maximum internal stub length of
0.053 meters on all SCSI signals. To remain compliant with the
standard, the SCSI bus cable must not add more than 0.047 meters
additional stub length to any of the single-ended SCSI signals or
.147 meters to any differential SCSI signals.

SCSI Bus Terminators
Single-Ended models have internal SCSI bus active terminators that
can be enabled by installing a jumper between pins 13 and 14 of the
Front Options Jumper Block or pins 7 and 8 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.

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 DM1050-02-0    |                         |

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.

SCSI Bus Electrical Characteristics
The following DC operating characteristics pertain to the single-
ended SCSI bus transceivers. All of these parameters meet the ANSI
SCSI-2 requirements.

 Ta = 0 to 70 deg. C
  |Symbol|Input Characteristics     |Min|Max|Units|Conditions     |
  |Vol   |Low level output voltage  |   |0.4| V   |lout = 48.0 mA |
  |Voh   |High level output voltage |2.5|   | V   |lout = -400  A |
  |Vil   |Low level input voltage   |0.0|0.8| V   |               |
  |Vih   |High level input voltage  |2.0|5.5| V   |               |
  |Iil   |Low level input current   |   |10 |  A  |               |
  |Iih   |High level input current  |   |50 |  A  |               |
  |Vihys |Input hysterisis          |0.3|   | V   |               |
  |Ci    |Input capacitance         |   |25 | pF  |W/terminators  |
  |      |                          |   |   |     |disabled, Typ= |
  |      |                          |   |   |     |19pF           |

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

 - 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 file will receive the -Slave SYNC signal,
   but it is not used by the file.

    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 1.75 seconds (1.25 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,

 - 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

   - 4 micro-seconds negative active pulse

   - 0.8 volts = valid low input

   - 2.0 volts = valid high input

   - 0.4 volts = low output

   - 64 milli-amps = maximum output low level sink current

   - high level output set by termination resistors

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

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.

During hot-unplugging if th eoperation shock limit specification can
be exceeded then the file should be issued a SCSI Stop Unit command
which is allowed to complete before un-plugging.


IBM 0662-S12/S1D/SW1/SWD SPITFIRE 41K.011, VER. 2.1, 4/12/1993

 - Industry-standard interface: ANSI/SCSI-2, single-ended (optional
   68 pin from SCSI-3)
 - Thermal compensation on each data surface for improving on track
   positioning capability.
 - SCSI disconnect and reconnect capability
 - Magnetoresistive (MR) heads
 - May be ordered with or without a bezel
 - SCSI bus parity
 - Multiple initiator support
 - Closed-loop actuator servo (dedicated disk servo surface plus data
 - Rotary voice coil motor actuator
 - Automatic actuator latch
 - Dedicated head landing zone
 - (0.4/4) 8/9 rate encoding
 - read-ahead caching
 - Tagged and Untagged command queuing
 - Command reordering
 - Back-to-back writes
 - Automatic sector reallocation
 - Error logging and analysis
 - Variable logical block length (512-744 supported)
 - Down-loadable SCSI firmware
 - Buffer memory parity
 - Self-diagnostics on power up
 - Automatic retry and data correction on read errors
 - In-line alternate sector assignment for high performance
 - Probability of not recovering data: 1 in 10(15) bits read
 - All mounting orientations supported
 - No preventative maintenance required
 - Two field Replaceable Units (FRU's:): Electronics and HDA  -
   Predictive Failure Analysis
 - Spindle synchronization
 - LED driver
 - Write cache supported (delayed write)
 - Automatic power management
 - SCSI behavior cutomizing jumpers
 - Longitudinal Redundancy Code (LRC)
 - ECC on the fly
 - Deep Data Recovery Procedures (DRP)

Thermal Compensation
The drive periodically compensates certain all heads to account for
movements caused by thermal changes. The compensation process is
initiated automatically by the drive.

The compensation of one head is called a process. A process is
started every 36 sec during the first hour after power is applied,
and every 3 minutes thereafter. Of that process period, 210 msec is
actually spent compensating a head.

Multiple SCSI commands are accepted and executed without delay during
a compensation process if the commands are received less than 50 msec
after the completion of the previous SCSI command.

There is one exception. If a head due to be compensated is not
compensated within the process period (due to the rapid arrival of
SCSI commands and/or commands that take a large amount of time to
execute relative to a process period), then the drive delays SCSI
non-Priority commands, except for Test Unit Ready, from executing
until that one head is compensated.

This scheme insures that each head is compensated at least every 3
minutes during the first hour after spin up, and every 15 minutes
thereafter. The intent of the scheme is to minimize the negative
effects of compensation on drive performance.

 Seek Time
       |Single cylinder (read) msec.      |   0.6  |
       |Single cylinder (write) msec.     |   2.5  |
       |Average                msec. typ. |   8.8  |
       |Full stroke (write)    msec.      |  18    |
       |Latency                msec. avg. |   5.56 |

SCSI Data Transfer Rate
The SCSI data transfer rate is dependent on the mode, either
synchronous or asynchronous. It also depends upon the width of the
data path used. 8 and 16 bit transfers are supported.

When the drive is configured for an 8 bit wide synchronous data
transfer rate of 10 MB/sec (instantaneous), the average SCSI data
transfer rate is realized will be at least 9.2 MB/sec. The 16 bit
transfer rates are 20 MB/sec and 18.4/sec respectively.

The asynchronous data transfer rate is dependent on both the
initiator and target delays to the assertion and negation of the SCSI
REQ and ACK signals. It is also dependent on SCSI cable delays. The
drive is capable of supporting up to 5 MB/sec asynchronous data
transfer rates.

The SCSI data transfer rate specification only applies to the Data
phase for logical block data for Read, Write, Write and Verify, etc.
commands. The data rate for parameter/sense data Request Sense, Mode
Select, etc... commands is not specified.

 Acoustics Levels
 Upper Limit Sound Power Requirements (Bels)
 |         |Octave Band Center Frequency (Hz) | A-weighted  |
 |Mode     | 125| 250| 500| 1 k| 2 k| 4 k| 8 k|Max. Sum     |
 |Idling   | 4.5| 3.5| 3.3| 3.5| 4.3| 4.3| 4.0|   4.75      |
 |Operating| 4.5| 4.0| 3.6| 4.1| 4.3| 4.6| 4.3|   4.7       |
 The operating mode is simulated by seeking at a rate between 12 and
 15 seeks per second.

Support for Other Block Lengths
A new release of the SCSI Interface code is required to support block
lengths less than 512 or greater than 744 bytes. A new SCSI Interface
Processor code release will be made available as the business
requires. Please contat your IBM Customer Representative if you have
requirements for block lengths other than 512-744.

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.

SPITFIRE uses a resettable "Positive Temperature Coefficient" (PTC)
resistor for TERMPWR short circuit protection. These devices will
trip when they are over-heated due to excess current flowing through
them. When the over current condition (i.e. current surge due to a
hot plug or intermittent short, or a solid short circuit) is removed,
the device can automatically reset, allowing TERMPWR to again be
sourced from this device.

SPITFIRE complies with the 8 Amp UL requirements. For systems that
prefer to comply with the SCSI-2 5 Amp recommended TERMPWR limit,
the 5 Volts power supplied to SPITFIRE should be limited to prevent
TERMPWR from exceeding 5 Amps. This would prevent a current surge in
excess of 5 Amps that may occur in the event of a short circuit,
before the PTC device can actually trip.



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

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

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

 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

 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

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.

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

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

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

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.

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