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Hard Drive: HEWLETT PACKARD: HP C2233 S(D) 234MB 3.5"/HH SCSI2 DIFF




H P   C 2 2 3 3   S ( D )    HEWLETT PACKARD
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/HH               Cylinders    1546|     |     |
Capacity form/unform   234/      MB        Heads           5|     |     |
Seek time   / track  12.6/ 3.0 ms          Sector/track     |     |     |
Controller           SCSI2 DIFFERENTIAL    Precompensation
Cache/Buffer            64 KB STATIC RAM   Landing Zone
Data transfer rate    2.200 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 50    |    -40 65
Power: sleep              W     Humidity     %         8 80    |      5 90
       standby            W     Altitude    km    -0.305  3.048| -0.305 15.240
       idle          11.9 W     Shock        g        10       |     50
       seek          13.6 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA        33
       spin-up       29.8 W     ECC        Bit   144,REED SOLOMON
                                MTBF         h     150000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates     CSA,IEC950,TUV,UL1950,VDE    

Layout

HEWLETT HP C2230 SERIES TECHNICAL REFERENCE MANUAL 5960-0113, 6.1991

   Single-Ended
  +---------------------------------------------------------+
  |                                              J5 1-+1-+J4|XX
  |                                                 | || |  |XX
  |                                                 4-+4-+  |XX
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |10+Option                                                |XX R
  || |Pinset                                                |XX F
  || |                                                      |XX A
  || |                                                      |XX C
  || |                                                      |XX E
  || |                                                      |1X
  |1-+                                                      |
  ++                                                        |XX
  ++LED                                                     |XX Power
  +---------------------------------------------------------+  1

        Front View
      +------------------------------------------------------+
      |                                                      |
      |LED   Option Pinset                                   |
      ++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------------------+
      |+-+ +1+2+3+4+5+-+6+7+-+8+9+10                         |

        Rear View
      +------------------------------------------------------+
      |                                                      |
      |  SCSI Connector                               Power  |
      +--------------------- ----------------------1---------+
      |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXX |
                                                     4 3 2 1

   Differential
  +---------------------------------------------------------+
  |                                                    1-+J4|XX
  |                                                    | |  |XX
  |                                                    4-+  |XX
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |10+Option                                                |XX R
  || |Pinset                                                |XX F
  || |                                                      |XX A
  || |                                                      |XX C
  || |                                                      |XX E
  || |                                                      |1X
  |1-+                                                      |
  ++                                                        |XX
  ++LED                                                     |XX Power
  +---------------------------------------------------------+  1

        Front View
      +------------------------------------------------------+
      |                                                      |
      |LED   Option Pinset                                   |
      ++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------------------+
      |+-+ +1+2+3+4+5+-+6+7+-+8+9+10                         |

        Rear View
      +------------------------------------------------------+
      |                                                      |
      |  SCSI Connector                               Power  |
      +--------------------- ----------------------1---------+
      |XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXX |
                                                     4 3 2 1

Jumpers

HEWLETT HP C2230 SERIES TECHNICAL REFERENCE MANUAL 5960-0113, 6.91

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

Option Pinset
-------------

            SCSI ID  -----------------------+
        Sync Spindle ----------------+      |
        Auto-Spin-Up -----------+    |      |
              Parity ---------+ |    |      |
                SDTR -------+ | |    |      |
      Unit Attention -----+ | | |    |      |
       Write Protect ---+ | | | |   +++   +-+-+
                        O O O O O o O O o O O O
                        O O O O O o O O o O O O
                        1 2 3 4 5   6 7   8 9 10

Pins 1 Write Protect
--------------------
When shorted, the entire drive is write protected. When open, the
Write Protect function is enabled and disabled with bit 7 of the
Mode Select command control byte, and the Write Protect status is
indicated by the WP bit in the Mode Sense parameter list header.

Pins 2 Unit Attention
---------------------
Controls the Unit Attention function

   OPEN   Enable Unit Attention
   CLOSED Inhibit Unit Attention

Pins 3 SDTR Synchronous Data Transfer Request
---------------------------------------------
When shorted, the drive will initiate an SDTR message at power-on and
RESET. When open, the drive will not initiate an SDTR message. The
drive will respon to a host-initiated SDTR message whether this pin-
set is open or shorted.

Pins 4 Parity
-------------
When shorted, the disk drive checks parity on commands and data. When
open, the disk drive does not check for parity. Parity bits are
generated whether this pin-set is open or shorted.

 Pins 5 Auto Spin-Up
 -------------------
   OPEN   Drive will not spin up until Initiator sends Start Unit
          Command
   CLOSED Drive will spin up automatically at Power-On

When not in the auto spin up mode the drive will return "Not Ready"
to all commands except REQUEST SENSE, INQUIRY, RESERVE, RELEASE, and
START UNTI until the drive is ready for access.

Pins 6 and 7 Synchronized Spindle
----------------------------------
Input/Output pins for the sync signal. Also routes the sync signal to
pin 29 of the SCSI connector.

6 = CLOSED; 7 = OPEN
Pin-set 6, upper pin, is sync output in Master Mode, or sync input in
Slave Mode. Lower pin is connected to ground. NOTE: when pinset 7 is
is open, pinset 6 MUST be shorted in order to connect pin 29 of the
SCSI connector to ground.

6 = OPEN; 7 = CLOSED
Connects sync signal line to pin 29 of SCSI connector. Pin 29 then
becomes sync output in Master Mode, or sync input in Slave Mode.
NOTE: When pinset 7 is shorted, pinset 6 MUST be open.

 Pins 8, 9, 10 SCSI Adress
 -------------------------
   +----------+-----------------------+
   | SCSI     |          Pins         |
   | Adress   |   8   |   9   |  10   |
   +----------+-------+-------+-------+
   |    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|
   +----------+-------+-------+-------+

The drive is shipped from the factory with shorting jumpers across
all three pin-sets which sets up a SCSI Address of 7.

Save any removed jumpers for future use.

Terminator Power Source Options
-------------------------------
The single-ended drive is shipped with terminator resistor packs
installed. When installing multiple drives on the SCSI channel, the
resistors must be disconnected from all but the last drive in the
chain. When the Terminator Enable jumper (J5, 1-2) is installed, the
resistors are connected to the SCSI connector; when removed, the
terminators are disconnected from the SCSI connector.

SINGLE-ENDED DRIVES
-------------------
Terminator Enable jumper (J5, 1-2) must be installed to connect the
termination resistors to the SCSI connector.

J5 3-4 Reserved, must be open.

 SINGLE-ENDED DRIVES
 -------------+-------------------------------------------------------
 Jumper       |Function
 -------------+-------------------------------------------------------
 J5 1-2 OPEN  |Terminator Resistor Packs disabled. Terminator
 J4 1-2 OPEN  |Resistors not connected TO SCSI Connector.
 J4 3-4 OPEN  |Drive +5V not connected to on-board terminators or to
              |SCSI connector pin 26.
              |Initiator supplied +5V not connected to on-board
              |terminators.
 -------------+-------------------------------------------------------
 J5 1-2 CLOSED|Drive +5V connected to on-board terminators but not to
 J4 1-2 CLOSED|SCSI connector pin 26.
 J4 3-4 OPEN  |
 -------------+-------------------------------------------------------
 J5 1-2 CLOSED|Initiator supplies +5V input to SCSI connector pin 26
 J4 1-2 OPEN  |for on-board terminators.
 J4 3-4 CLOSED|
 -------------+-------------------------------------------------------
 J5 1-2 CLOSED|Drive +5V connected to on-board terminators and to SCSI
 J4 1-2 CLOSED|connector pin 26.
 J4 3-4 CLOSED|
 -------------+-------------------------------------------------------

 DIFFERENTIAL DRIVES
 ---------------------------------------------------------------------
 Terminator Enable and Reserved (J5) pinsets are NOT INSTALLED on
 standard drives.
 ---------------------------------------------------------------------
 Termination power pinset (J4 1-2) connects +5V to SCSI connector pins
 25 and 26 when shorted.
 ---------------------------------------------------------------------
 Termination power pinset (J4 3-4) is NOT USED; normally open.
 ---------------------------------------------------------------------

Install

HEWLETT HP C2230 SERIES TECHNICAL REFERENCE MANUAL 5960-0113, 6/91

Notes on installation
=====================

Protection From Mechanical Shock
--------------------------------
The mechanism is attached to the mounting frame(s) by pliable shock
mounts that isolate it from mechanical shock when properly installed.
Before installation, the disk drive is susceptible to damage from
excessive shock and vibration during shipping and handling. Dropping
a drive almost always causes immediate damage, but setting a drive
down too hard may shorten its operational life. The damage can be
hidden, and can reduce the life of the drive, or cause unexplained
failure to occur at a later date.

Physical Mounting
-----------------
Typically, the disk drive is fastened directly to a chassis with four
no. 6/32 screws.

There are twelve (12) threaded mounting holes (for no. 6/32 threads)
on the disk drive: four on each side, and four on the bottom.

Use the following guidelines to mount the disk drive:

- Use 6/32 screws and torque them to 15 inch-pounds.

  - When mounted, the hardware must not protrude more than 4 mm (0.12
    inch) beyond the inside of the disk drive frame.

  - Maintain a minimum clearance of 0.06 in. (1.5mm) between any
    system structure and the top and all four sides of the disk drive.

  - Maintain a minimum clearance of 0.04 in. (1.0mm) between the
    bottom mounting surface and any PCA component.

Airflow Requirements
--------------------
The disk drive must be installed such that the ambient air
temperature surrounding the disk drive is maintained within the
limits.

Airflow is required to maintain disk drive performance and
reliability. The disk drive can be cooled by forced air or by natural
cooling. Forced air may be necessary if the disk drive is located
within a cabinet or other enclosure. If forced air cooling is not
used, the disk drive must be located such that internal heat is
conducted away from the drive and no outside heat sources raise the
operating temperatures above the limits.

Cable Requirements
------------------
The disk drive adheres to the cabling requirements and limitations
set forth in the ANSI SCSI specifications.

  - Cables with a characteristic impedance of 100 ohms  10% are
    recommended for unshielded flat or twisted pair ribbon cable.

  - Cables with a characteristic impedance of 90 ohms  10% are pre-
    ferred for shielded cables.

  - To minimize discontinuities and signal reflections, do not use
    cables with different impedances on the same bus.

  - A minimum cable size of 28 AWG should be used to minimize noise
    effects and ensure proper distribution of terminator power.

- Cables should be properly terminated.

Recommended Mating Connectors
-----------------------------

SCSI Connector (single-ended) 3M 3425-6600

DC Power AMP 1-480424-0

 LED Connector                                  AMP 102107-3 (for AWG
                                                22-26 wire)

 Synchronized Spindle Connector                 AMP Housing 4-87456-9
                                                (*1)

Shorting jumpers for option pinsets:

   2*1 shorting jumper:   Dupont 86730-001
   2*2 connector housing: Dupont 69307-004 (*2)
   2*3 connector housing: Dupont 69307-006 (*2)
   2*5 connector housing: Dupont 69307-010 (*2)

Notes:

1. Requires a contact set; (For AWG 20-24 wire, use AMP 1-87309-4)

 2. Contact inserts required: (For AWG 26-30, use Dupont 77138-101;
    for AWG 32-36 wire, use Dupont 77139-101)

Single-Ended Cable
------------------
A 50-conductor flat cable or 25-signal twisted-pair cable should be
used. Cable length should be equal to or less than 6.0 meters. This
refers to internal and external cable length (except stubs).

A stub length of no more than 0.1 meter is allowed off the main line
interconnection within any connected device.

Differential Cable
------------------
A 50-conductor flat cable or 25-signal twisted-pair cable should be
used. Cable length should be equal to or less than 25 meters. This
refers to internal and external cable length (except stubs).

A stub length of no more than 0.2 meter is allowed off the main line
interconnection within any connected device.

 Power Distribution
 ------------------
 The +5 and +12 voltages provided by an external dc power supply are
 distributed to the spindle motor driver, actuator driver, analog
 amplifiers, and digital circuitry. A reset output alerts the other
 circuits when power-on occurs and when power is lost. Each circuit
 responds in a predefined manner to the reset condition.

Look Ahead Reads
----------------
The Look Ahead Read capability can improve the performance of a drive
doing sequential READs by preloading the buffer with the data most
likely to be requested with the next READ command. After a READ
command is received by the controller, the drive seeks to the proper
location and loads the requested data into the buffer. While that
data is being transferred to the host, the Look Ahead Read function
continues to read the remainder of the current track into the buffer.
If, in subsequent READ requests, the host asks for the following
blocks on the same track, they will already be in the buffer, and the
data will be returned to the host without the delay of a media
access. However, the controller is optimized to return any requested
data to the host as fast as possible.

If a new READ command requests data not contained in the buffer while
the drive is performing a Look Ahead Read, the process is aborted,
and the drive will immediately seek to the new location with no
effect on access or transfer performance. Filling the track buffer
with unrequested data has a lower priority than delivering requested
data.

RAM Buffer
----------
The RAM Buffer contains 64-kilobytes of static RAM. All data
transferred between the host and the disk must pass through the RAM
buffer.

Synchronized Spindle
--------------------
There are four synchronized spindle modes: Stand Alone, Slave,
Master, and Master Control. The HP C2230 SCSI disk drives supports
the Stand Alone, Slave, and Master modes, but not the Master Control
mode.

The power-on default for all drives is the Stand Alone mode. The
Synchronized Spindle function is controlled with the RPL bits in
parameter 04 (hex), byte 17 of the Mode Select command. In addition,
byte 18 of the same Mode page provides for positional offset from the
input sync signal.

When the drive is in the Stand Alone mode:

- It does not transmit a sync signal on the master line.
- It does not receive an externally sourced slave sync input.

When the drive is set to the Slave mode:

  - It does not transmit a sync signal.
  - It receives an externally sourced slave sync on the slave input
    line (or from the SCSI connector pin 29).

When the drive is set to the Master mode:

  - It transmits a sync signal on both the master and slave lines
    (or from the SCSI connector pin 29).
  - It syncs internally to the same signal.

Front Panel LED Indicator
-------------------------
The light emitting diode (LED) indicator on the front of the disk
drive is an activity light that indicates the oerational status of
the drive from power-on, through the self-test diagnostics, and into
normal operation:

 1. ON   When the disk drive is switched on, the LED normally stays on
         during the power-on sequence. The LED stays on while the
         spindle motor is being started until it is up to speed. If
         the LED is does not go out, a catastrophic failure has
         occured. The most probable cause is a failure of the drive
         electronics/controller PCA.

 2. FLASHING
         A flashing LED (approximately 1 Hz) insicates that the
         controller has failed all or a portion of the internal
         diagnostic tests.

 3. INTERMITTENT
         After the power-on diagnostics have completed, the LED
         functions as an activity light and will go on any time the
         disk drive is executing a command, reading, or writing. If
         the LED is off, the drive is idle.

Features

HEWLETT HP C2230 SERIES TECHNICAL REFERENCE MANUAL 5960-0113

Product Description
-------------------
The HP C2230 SCSI single-ended and differential disk drives are
reliable, low cost, high capacity, high performance, random access
mass storage devices. Each product utilizes sputtered thin-film
3.5-inch disks as storage media.

The disk drive is orderable with or without a:

- front bezel
- front panel LED indicator
- terminator resistor packs
- differential interface

 Seek Time
 ---------
       +-----------------------------------+--------+
       |Track-to-Track          msec. typ. |   3    |
       +-----------------------------------+--------+
       |Random Average          msec. typ. |  12.6  |
       +-----------------------------------+--------+
       |Maximum Seek (1962 cyl) msec. typ. |  25    |
       +-----------------------------------+--------+
       |Head Switch Time        msec. typ. | < 1.0  |
       +-----------------------------------+--------+
       |Latency (Average)       msec. avg. |   8.33 |
       +-----------------------------------+--------+

Assembly Descriptions
---------------------
The assemblies in the disk drive include the head/disk assembly (HDA)
and the drive/electronics printed-circuit assemly (PCA). The sealed
HDA contains the mechanical and electromechanical assemblies of the
disk drive. The drive/electronics PCA provides all electronic control
over the HDA.

Head/Disk Assembly
------------------
The head/disk assembly (HDA) contains disks, heads, an actuator
assembly, head interface circuits, atmospheric controls, vibration
isolators, and a spindle assembly. A stainless steel baseplate and
cover provide the supporting structure for these parts. The entire
assembly is sealed and is not field repairable.

Atmospheric Controls
--------------------
The atmospheric controls in the HDA consist of a breather system and
a recirculating filter. The breather system equalizes air pressure
within the HDA to ambient air pressure. A breather filter prevents
contaminants from entering the HDA. A recirculating filter maintains
the internal cleanliness of the HDA.

Vibration Isolators
-------------------
The HDA is mounted on vibration isolators to protect it from high
frequency external vibrations.

Spindle Assembly
----------------
The spindle assembly provides the mechanical mounting for the disks.
The spindle rotates on a ball bearing system and is driven by an
"in-hub" brushless DC motor. The drive current for the motor is
supplied by the spindle drive circuit on the drive/electronics PCA.
Three Hall-effect sensors, mounted on the spindle assembly, provide
feedback signals to the spindle control electronics for speed and
phase switching control.

Defect List
-----------
The defect list consists of a 4-byte header followed by zero or more
8-byte defect descriptors. Each descriptor consists of an 8-byte
physical address or bytes from index address. Each address is bounds-
checked by the Target. If any address is out of bounds, an ILLEGAL
REQUEST Sense Key is generated, and the format operation is
discontinued.

Error Correction Code
---------------------
The HP C2233/34/35 Series of disk drives use a Reed-Solomon error
correction code (ECC) for detection and correction of data errors.
During a write operation, the ECC function generates 18 bytes of ECC
information, and writes the information into the ECC field as the
sector is written. During a read operation, the controller generates
an 18-byte code rom the data field being read, and compares it to the
ECC field created during the write operation. If the 18-byte code
differs from the ECC field, a data error is detected and the ECC
field is used to correct the data.













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