Hard Drive: SEAGATE: ST423451W ELITE 23 23200MB 5.25"/FH SCSI3 WIDE
S T 4 2 3 4 5 1 W E L I T E 2 3 SEAGATE
Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 6880| | |
Capacity form/unform 23200/29400 MB Heads 28| | |
Seek time / track 13.0/ 1.5 ms Sector/track | | |
Controller SCSI3 SI/WI/ULTRA Precompensation
Cache/Buffer 2048 KB MULTI-SEGMEN Landing Zone
Data transfer rate 11.000 MB/S int Bytes/Sector 512
20.000 MB/S ext SYNC
Recording method PRML 0/4/4 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 50 |
Power: sleep W Humidity % |
standby W Altitude km |
idle 22.0 W Shock g |
seek 27.0 W Rotation RPM 5400
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 800000
Warranty Month 60
Lift/Lock/Park YES Certificates
Layout
SEAGATE ST423451N/W/WD INSTALLATION GUIDE 83329130 REV. A
+---------------------------------------------------------++-+J4B | |+-1 | |XX | |XX Power | |XXI | |XXN | 4-3 |XXT | +-1 J01 |XXE | |XXR | |XXF | |XXA | |XXC | |XXE | |+-+ | || | J4A | || | | || | | || | +---------------------------------------------------------++-1
Jumpers
SEAGATE ST423451N/W/WD INSTALLATION GUIDE 83329130 REV. A
Jumper Setting
==============
SCSI ID
-------
Each device on the SCSI chain must have a unique SCSI ID. The host
system's SCSI controller usually uses the ID that has the highest
priority interrupt in the SCSI I/O system. This is always ID7. ID0 is
lowest priority in an 8-bit I/O system. ID8 is lowest priority in a
16-bit I/O system. The lower priority SCSI IDs are normally used for
other SCSI devices such as this Elite disc drive.
NOTE! Most SCSI controllers (host adapters) allow you to skip a SCSI
ID. For example, you can have ID0, ID1, and ID3 (skipping ID2). Other
controllers do not allow this so be sure to refer to your system or
controller user's manual for details about its requirements for
proper SCSI device installation.
NOTE! This drive is a SCAM (SCSI Configured Auto Magically) compliant
drive. If the system into which you are installing this drive
requires SCAM compliant drives, you do not need to be concerned about
the drive ID jumper settings, as the system automatically assigns
your new drive the ID it wants it to have. The system may or may not
use the existing drive ID jumper settings. Setting the drive ID
doesn't hurt anything, but is not necessary in a SCAM compliant
system.
Most Elite 23 disc drives are factory set with the SCSI ID set at 0.
To change the SCSI ID, refer to the appropriate drive section for
your model.
If, after completing the installation process, the drive's LED does
not show on/off activity when the host is trying to communicate with
the drive, a duplicate SCSI ID may be the problem. If this is the
case, change the ID so that each device on the SCSI chain has its own
unique ID. Also check your system or controller user's manual to
ensure that you have not violated its SCSI ID numbering
recommendations.
Drive termination
-----------------
If you are installing a Elite 23 drive in a system that has other
SCSI devices installed, terminate only the end devices on the SCSI
chain. A SCSI "device" is any disc drive, scanner, tape backup unit,
or other piece of hardware connected to your system using the SCSI
bus.
NOTE! Some controllers prefer to remain terminated even if they are
in the middle of the chain. Also, some controllers treat the internal
and external chains as separate logical buses. This means you may
need to terminate both the first and last devices on both logical
buses to achieve proper termination. If necessary, refer to your
system or controller documentation to see how this is handled in your
particular system.
Terminator power
----------------
You usually will not need to change this option and can normally
leave the drive configured as it was shipped from the factory. For
information about how to change the terminator power option on your
drive, refer to the appropriate drive-specific section.
I/O circuits and data path widths --------------------------------- - WD models use differential I/O circuits. You cannot mix these models with single-ended models (N, W) on the same SCSI bus. The circuits are incompatible with each other.
- W and WD, models have a "wide" (16-bit) SCSI data bus rather than the standard (non-wide) 8-bit SCSI data bus; how-ever, you can use these wide drives on a standard (non-wide) 8-bit data bus.
SCSI ID jumpers (N models)
--------------------------
Use the J4A connector to set the SCSI ID on model ST423451N. To
change the SCSI ID, install jumpers on the appropriate pins as shown.
+-J4A-------------------+ |o o o o o o o| SCSI ID 0 default |1 o o o o o o| +-----------------------+ +-J4A-------------------+ |o X o o o o o o| SCSI ID 1 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X o o o o o o| SCSI ID 2 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X X o o o o o o| SCSI ID 3 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X o o o o o o| SCSI ID 4 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X X o o o o o o| SCSI ID 5 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X X o o o o o o| SCSI ID 6 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ |o X X X o o o o o o| SCSI ID 7 |1 X X X o o o o o o| +-----------------------+
SCSI ID jumpers (W models)
--------------------------
Use the J4A connector to set the SCSI ID on model ST423451W/WD. To
change the SCSI ID, install jumpers on the appropriate pins as shown.
+-J4A-------------------+ | o o o o o o| SCSI ID 0 default |1 o o o o o o| +-----------------------+ +-J4A-------------------+ | X o o o o o o| SCSI ID 1 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ | X o o o o o o| SCSI ID 2 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ | X X o o o o o o| SCSI ID 3 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ | X o o o o o o| SCSI ID 4 |1 X o o o o o o| +-----------------------+ +-J4A-------------------+ | X X o o o o o o| SCSI ID 5 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ | X X o o o o o o| SCSI ID 6 |1 X X o o o o o o| +-----------------------+ +-J4A-------------------+ | X X X o o o o o o| SCSI ID 7 |1 X X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X o o o o o o| SCSI ID 8 |X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X o o o o o o| SCSI ID 9 |X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X o o o o o o| SCSI ID 10 |X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X X o o o o o o| SCSI ID 11 |X X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X o o o o o o| SCSI ID 12 |X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X X o o o o o o| SCSI ID 13 |X X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X X o o o o o o| SCSI ID 14 |X X X o o o o o o| +-----------------------+ +-J4A-------------------+ |X X X X o o o o o o| SCSI ID 15 |X X X X o o o o o o| +-----------------------+
Terminating the drive
---------------------
ST423451N drives are terminated with permanently mounted IC active
terminators. If you install one of these drives and it is not on the
end of the SCSI bus, disable the terminators by removing the TE
jumper from pins 19 and 20 of connector J4A. If you install the drive
on the end of the SCSI bus, enable termination by installing a
jumper on pins 19 and 20 of connector J4A.
+-J4A-------------------+ |o o o o o o o o X o| Terminator Enabled |1 o o o o o o o X o| +-----------------------+ +-J4A-------------------+ |o o o o o o o o o| Terminator Disabled |1 o o o o o o o o| +-----------------------+
Terminating the drive (W models)
--------------------------------
ST423451W drives are terminated with permanently mounted IC active
terminators. If you install one of these drives and it is not on the
end of the SCSI bus, disable the terminators by removing the TE
jumper from pins 19 and 20 of connector J4A. If you install the drive
on the end of the SCSI bus, enable termination by installing a
jumper on pins 19 and 20 of connector J4A.
NOTE
Use active (ANSI SCSI-2 Alternative 2) terminators when terminating
the bus.
ST423451WD drives do not have internal terminators or any other way
of adding internal termination to the drive. You must provide
external differential termination to these drives when termination
is required.
+-J4A-------------------+ |o o o o o o o o X o| Terminator Enabled |1 o o o o o o o X o| +-----------------------+ +-J4A-------------------+ |o o o o o o o o o| Terminator Disabled |1 o o o o o o o o| +-----------------------+
Terminator power (N models)
---------------------------
There are three possible terminator power configurations for
ST423451N drives. You will not normally need to change this option
and can leave the drive configured as it was shipped from the
factory.
2---4 |X o|J01 Internal terminator power source. |X o| 1---3
2---4 |xxx|J01 External terminator power source. |o o| 1---3
2---4 |xxx|J01 Internal terminator and drive power to I/O. |xxx| 1---3
Terminator power (W models)
---------------------------
There are three possible terminator power configurations for
ST423451W drives. You will not normally need to change this option
and can leave the drive configured as it was shipped from the
factory.
There are two possible terminator power configurations for ST423451W
drives.
2---4 |X o|J01 Internal terminator power source. |X o| 1---3
2---4 |xxx|J01 External terminator power source. |o o| 1---3
2---4 |xxx|J01 Internal terminator and drive power to I/O. |xxx| 1---3
J4B Other applicable jumper options (N models)
----------------------------------------------
Spin Delay Option ----------------- +-------+ | o o o| Immediate spinup (if the Start Command option jumper is | o o o| disconnected) 1-------+ +-------+ |X o o o| Spinup delay equal to the SCSI Bus ID multiplied by 12 |X o o o| seconds (if the Start Command option jumper is 1-------+ disconnected)
Start Command Option -------------------- +-------+ |o o o| Start spindle according to the Spinup Delay option jumper |o o o| 1-------+ +-------+ |o X o o| Start spindle after the SCSI Bus sends a Start Unit command |o X o o| 1-------+
SCSI Bus Parity Check --------------------- +-------+ |o o o| Check the parity of data bytes read from the SCSI Bus |o o o| 1-------+ +-------+ |o o X o| Ignore parity check |o o X o| 1-------+
+-------+ |o o o | RESERVED |o o o | 1-------+
J4B Other applicable jumper options (W models)
----------------------------------------------
Spin Delay Option ----------------- +-------+ | o o o| Immediate spinup (if the Start Command option jumper is | o o o| disconnected) 1-------+ +-------+ |X o o o| Spinup delay equal to the SCSI Bus ID multiplied by 12 |X o o o| seconds (if the Start Command option jumper is 1-------+ disconnected)
Start Command Option -------------------- +-------+ |o o o| Start spindle according to the Spinup Delay option jumper |o o o| 1-------+ +-------+ |o X o o| Start spindle after the SCSI Bus sends a Start Unit command |o X o o| 1-------+
SCSI Bus Parity Check --------------------- +-------+ |o o o| Check the parity of data bytes read from the SCSI Bus |o o o| 1-------+ +-------+ |o o X o| Ignore parity check |o o X o| 1-------+
+-------+ |o o o | RESERVED |o o o | 1-------+
Active, Ready, and Fault Indicators (W/N Models) ------------------------------------------------ +-J4A-------------------+ |o o o o o o o o o| RESERVED |1 o o o o o o o o| +-----------------------+ +-J4A-------------------+ |o o o o o o o o X o| Terminator Enabled |1 o o o o o o o X o| +-----------------------+ +-J4A-------------------+ |o o o o o o o o o | RESERVED |1 o o o o o o o o | +-----------------------+
+-J4A-------------------+
|o o o o o o +-* o o o|
|1 o o o o o |+* o o o|
+------------++---------+
+-J4A--------++---------+
|o o o o o o ||o+* o o|
|1 o o o o o ||o|*+o o|
+------------++-+-+-----+
++-+-+-----------------------xxxxxx Active LED
*-+-+-----------------------xxxxXX
| | | Cath
| | +-----------------------xxxxxx Fault LED
*-+-------------------------xxxxXX
| | Cath
| +-------------------------xxxxxx Ready LED
+---------------------------xxxxXX
Cath
NOTE
On some LEDs the flat side of indicator is cathode!
Install
SEAGATE ST423451N/W/WD INSTALLATION GUIDE 83329130 REV. A
Notes on Installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions).
Orientation
-----------
We recommend orienting the drive or directing the air flow in a way
that creates the least amount of air-flow resistance while providing
air flow above the circuit boards and around the head and disc
assembly (HDA). Also, choose the shortest possible path between the
air inlet and exit. This minimizes the distance traveled by air that
is heated by the drive and by other nearby heat sources.
The air-flow patterns can be created by the fans either pushing or
drawing air. The overall flow pattern can be directed from front to
back, back to front, or side to side.
Mounting the drive and connecting cables
----------------------------------------
Do not touch the connector pins or any components on the control
board without observing static-discharge precautions.
Always handle the drive by the frame only.
The drive may be mounted in any orientation (horizontally,
vertically, and any combination thereof); however, you must ensure
that the drive receives adequate air flow for cooling.
1. Mount the drive to the host system's chassis using four 6-32 UNC
screws. Two mounting holes are in each side of the HDA and there
are four mounting holes in the bottom of the HDA. The maximum
length that the screws should extend into the HDA mounting holes
is 0.17 inch (4.318 mm), measured from the outer surface of the
HDA. Tighten the screws down evenly. Do not over-tighten or force
the screw if it does not seem to screw in easily, because this
means the threads are not properly aligned. In this case, back the
screw out and try again.
2. Verify that all connections between the drive and the host system
are correctly installed.
3. Verify that you have correctly installed jumpers.
4. Connect the SCSI cable into the drive's SCSI connector. Take care
not to stretch or crimp this cable, and do not block the system's
cooling air flow with the cable. The drive receives DC power
through a 4-pin connector mounted next to the SCSI connector. The
output of a power supply must meet SELV (safety extra low voltage)
as defined in IEC 950. To connect the DC power cable to the drive,
simply insert the cable end into the drive's DC power connector.
Note. Signal ground on the printed circuit board assembly (PCB) and
the head and disc assembly (HDA) are connected together in
this drive and you cannot separate them. Ensure the equipment
in which you have mounted the drive is connected directly to
the HDA. Maximizing the conductive contact area between HDA
ground and system ground may reduce radiated emissions.
If you do not want the system chassis to be connected to the HDA/PCB
ground, you must provide a nonconductive (electrically isolating)
method of mounting the drive in the host system. This may increase
radiated emissions and is the system designer's responsibility.
5. Replace the host system's cover.
Features
SEAGATE ST423451N/W/WD INSTALLATION GUIDE 83329130, REV. A
This manual contains information for users of the Seagate
ST423451 Elite 23 SCSI disc drives.
It provides support services, performance specifications, and initial
setup information.
Electrostatic discharge protection
----------------------------------
Caution
Removal of circuit boards by personnel not performing depot repair
will damage components and may void the warranty.
All drive electronic assemblies are sensitive to static electricity,
due to the electrostatically sensitive devices used within the drive
circuitry.
Although some devices such as metal-oxide semiconductors are
extremely sensitive, all semiconductors, as well as some resistors
and capacitors, may be damaged or degraded by exposure to static
electricity.
Electrostatic damage to electronic devices may be caused by the
direct discharge of a charged conductor or by exposure to the static
fields surrounding charged objects. To avoid damaging drive
electronic assemblies, observe the following precautions when
installing or servicing the drive:
- Ground yourself to the drive whenever the drive electronics are or will be exposed. Connect yourself to ground with a wrist strap (Seagate part number 12263496). Connection may be made to any grounded metal assembly. As a general rule, remember that you and the drive electronics must all be grounded to avoid potentially damaging static discharges.
- Turn off the power before removing or installing the DC power cable.
- Do not remove any circuit boards from the drive.
- Never use an ohmmeter on any circuit boards.
- When installing the drive on a carrier or tray, discharge the carrier or tray prior to inserting it into the system.
Important safety information and precautions
--------------------------------------------
Caution
Use forced-air ventilation when bench-testing the drive to ensure
proper cooling of drive components.
Use proper safety techniques for safe, reliable operation of this
unit.
The procedures in this manual and labels on the unit contain warnings
and cautions that must be carefully read and followed to minimize or
eliminate the risk of personal injury. The warnings point out
conditions or practices that may endanger you or others. The
cautions point out conditions or practices that may damage the unit,
possibly making it unsafe for use.
Always observe the following warnings and precautions:
- Follow all cautions and warnings in the procedures.
- Use sound safety practices when operating, installing, or removing the unit.
- Use caution when troubleshooting a unit that has voltages present. Turn off power to the unit before removing it.
- Ensure that the internal temperature of the rack or cabinet does not exceed the limits defined for the drive when the drive is mounted in an equipment rack or cabinet. When units are stacked vertically, pay special attention to the top where temperatures are usually highest.
- Follow the precautions listed above in "Electrostatic discharge protection."
- Do not remove any circuit boards from the drive. Return the entire drive for depot repair if any circuit board is defective. Removal of circuit boards by personnel not performing depot repair will damage components and may void the warranty.
- Return the entire drive for depot repair if the HDA is defective.
- Do not attempt to disassemble the HDA. It is not field repairable. If the sealed HDA is opened by personnel not performing depot repair, this will damage components and void the warranty.
As a component, this drive is designed to be installed and operated
in accordance with UL1950, EN60950, CSA C22.2 950-M89, and VDE0805.
Seagate takes all reasonable steps to ensure that its products are
certifiable to currently accepted standards. Typical applications of
these disc drives include customer packaging and subsystem design.
Safety agencies conditionally certify component assemblies, such as
the Elite disc drive, based on their final acceptability in the
end-use product. The subsystem designers are responsible for meeting
these conditions of acceptability in obtaining safety-regulatory
agency compliance in their end-use products and for certifying where
required by law. A necessary part of meeting safety requirements is
the provision for overcurrent protection on drive SELV supply
voltages.
This unit is a component part and as such is not meant to comply with
FCC or similar national requirements as a stand-alone unit.
Engineering radiated emissions test results are available through the
Seagate Safety Department to assist the subsystem designer.
European Union Compliance If this model has the CE Marking, it
complies with the European Union requirements of the Electromagnetic
Compatibility Directive 89/336/EEC of 03 May 1989 as amended by
Directive 92/ 31/EEC of 28 April 1992 and Directive 93/68/EEC of 22
July 1993.
Seagate uses an independent laboratory to confirm compliance to the
above directives. The drive was tested in a representative system for
typical applications. The selected system represents the most popular
characteristics for test platforms. The system configurations
include:
- 486, Pentium, and PowerPC Microprocessors
- 3.5-inch Floppy Disc Drive
- Keyboard
- Monitor/Display
Although the test system with this Seagate model complies to the
directives, we cannot guarantee that all systems will comply. The
computer manufacturer or system integrator shall confirm EMC
compliance and provide CE Marking for their product.
General description
--------------------
Elite 23 SCSI disc drives are high-speed, random-access digital-data
storage devices.
The drive is a component for installation in an enclosure designed
for the drive. This is often a rack within the system or an external
enclosure designed to house one or more disc drives or other
peripheral units. In either case, the disc drive must receive
adequate cooling (refer to "Providing adequate cooling") and it must
be sufficiently grounded and shielded from emissions. The Elite 23
Product Manual (part number 83329140) contains guidelines for a
properly designed enclosure.
Providing adequate cooling
--------------------------
The enclosure design must ensure adequate cooling for the drive. The
maximum ambient temperature is 50*C. The drive's product manual
(83329140) describes how to evaluate the air-flow design. The
evaluation consists of ensuring that the case temperature of certain
critical components remains within acceptable limits during drive
operation.
We recommend orienting the drive or directing the air flow in a way
that creates the least amount of air-flow resistance while providing
air flow above the circuit boards and around the head and disc
assembly (HDA). Also, choose the shortest possible path between the
air inlet and exit. This minimizes the distance traveled by air that
is heated by the drive and by other nearby heat sources.
The air-flow patterns can be created by the fans either pushing or
drawing air. The overall flow pattern can be directed from front to
back, back to front, or side to side.
Formatting the drive
--------------------
Warning!
Formatting a drive erases all user data. Be sure that you understand
this principle before formatting any hard disc drive. It is not
necessary to format a drive that previously has been used to store
data, unless your intention is to erase all user data.
Note
Seagate is not responsible for lost user data.
1. Turn on DC power.
2. Boot the system from a system floppy disc or from a previously
installed hard disc drive if there is one.
3. Format the disc drive. Elite 23 disc drives are designed to
operate with a variety of operating systems. Please refer to your
system or SCSI controller manual for information about formatting
and setting up the drive. Some quick desktop system notes are
provided below.
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