Seagate Cheetah 73LP,ST373405LW,ST373405LC,ST373405LWV,ST373405LCV,ST336605LC,ST336605LCV Installation Manual

Cheetah 73LP Installation Guide

Model ST373405LW/LC/LWV/LCV, ST336605LC/LCV
SCSI interface disc drive

Publication Number: 100109946, Rev. A, April 2001

Handling precautions/Electrostatic discharge protection

• Disc drives are fragile. Do not drop or jar the drive and handle the drive
only by the edges or frame.

• Drive electronics are extremely sensitive to static electricity. Keep the
drive in its antistatic container until you are ready to install it. Wear a wrist
strap and cable connected to ground. Discharge static from all items near
or that will contact the drive. Never use an ohmmeter on any circuit
boards.

• Turn off the power to the host system during installation.

• Always use forced-air ventilati on when operating the drive .

• Use caution when troubleshooting a unit that has voltages present.

• Do not disassemble the drive; doing so voids the warranty.

• Return the entire drive for depot service if any part is defective.

• Do not apply pressure or attach labels to circuit board or drive top.

Electromagne tic compliance

See Safety and Regulatory Agency Specifications, p/n 75789512.

Drive characteristics

ST373405 ST336605

Formatted capacity (Gbytes) 73.4 36.7
Max. data blocks 143,374,741 71,687,371

(088BB995h) (0445DCCBh)
Cylinders (user accessible) 29,549 29,549
Heads (user accessible) 8 4
Disc rotation (rpm) 10,041 10,041
Operating voltages +5V +12V +5V +12V

Typical operating current (Amps) 0.82 0.91 0.82 0.82

What you need

• Phillips screwdriver and four 6-32 UNC drive mounting screws

• Forced-air ventilation to provide adequate drive cooling

• An unused drive power connector from your system’s power supply

(not applicable to LC/LCV models because power is supplied through the

interface connector on these units)
To operate at LVD transfer rates, you may also need an LVD-capable SCSI
host adapter, LVD I/O cable and active negation external terminator.

Multimode interface

This drive can operate in single-ended (SE) or low voltage differentia l (LVD)
mode. This multimode capability provides backwards compatibility so you
can use it with or without an LVD-cap able host adapter. The primary bene­fits of LVD technology include faster transfer rates, reduced power con­sumption, increased allowable cable lengths, and improved device
connectivity.

You can configure the drive to switch between SE and LVD modes automat­ically or force it to operate in SE mode only. To configure this option, see
Figure 2.

Note. To operate at the Ultra2 rates in LVD mode, all devices on the same

bus (cable) must be running in LVD mode. If you add any SE device
to the bus, all devices on that bus operate in SE mode.

Note. Some LVD host adapters provide an LVD connector and an SE con-

nector on the same host adapter to allow you to run SE and LVD
drives concurrently at their maximum capabilities. Check your SCSI
host adapter documentation. See Figure 3.

Caution. Do not mix L V D drives on the same bus with high v olt age diff eren-

tial (HVD) devices–drive damage may occur.

Installation instructions

1. Set the SCSI ID

Determine which SCSI IDs are already being used in the system and then
assign this disc drive a SCSI ID that isn’t already being used. Use the J6
connector located on the front of the drive to set the SCSI ID (see Figure 1).

• Most ST373405 drives are factory set with the SCSI ID set at 0. If this is

the only SCSI drive in your system and there are no other SCSI devices

on the daisychain, you can leave this drive’s SCSI ID set to 0 and pro­ceed to the next step.

• The host system’s SCSI controller usually uses SCSI ID 7.

• If you have an LC or LCV model drive, the host normally sets the ID over
the I/O interface, so you don’t need to worry about this step.

• Some systems provide a cable designed to connect to the J5 jumper
block on the drive to remotely set the ID. You can connect this cable to J5
and use the host-provided remote switch to set the SCSI ID.

Figure 1. Setting the SCSI ID (the J5 block is on LW/LWV models only)

2. Configure terminat ion

If you are installing the drive in a system that has other SCSI devices
installed, terminate only the end devices on the SCSI bus (cable). This drive
does not have internal terminators or any other way of adding internal termi­nation on the drive. You must provide external termination when termination
is required. This is normally done by adding an inline terminator on the end
of the cable. See Figure 3 for an illustration showing a system configuration
that uses an external terminator.

• Use active (ANSI SCSI-2 Alternative 2) single-ended terminators when
terminating a bus operating in single-ended mode.

• Use SPI-2-compliant active low voltage differential terminators when ter­minating a SCSI Ultra2 bus operating in LVD mode.

• The host adapter is normally on the end of the bus and internally termi­nated. You can configure your bus with another device on the end if you
remove termination from the host adapter.

3. Configure terminat or power

Terminators have to get power from some source. The default configuration
results in the drive not supplying termination power to the bus. You should
normally leave this drive set at this default unless your host system requires
the drive to supply termination power to the bus. To c onfigure this drive to
supply termination power to the bus, place a jumper on J2 pins 1 and 2 as
shown in Figure 2.

• Host systems designed to use LC and LCV drives normally provide termi­nation power from the host adapter or other source. For this reason, LC
and LCV model drives cannot be configured to provide termination power
to the bus.

SCSI ID = 0 (default)

Jumper Plug

(enlarged to
show detail)

J6

Drive
Front

Pin 1

Reserved

A2A1A0A

L
E
D

R
E
S

3

SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15

J1

DC Power

J1

68 Pin

SCSI I/O

Connector

Drive HDA

Rear

SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13

SCSI ID = 14
SCSI ID = 15

A

not used

3A2A1

SCSI ID = 0
SCSI ID = 1
SCSI ID = 2

SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7

A

0

J5

Pin 1

4P 3P 2P 1P

PCBA

Pin 1

+5V

Ground

(default)

Figure 2. Option select jumpers

4. Connect the drive activity LED (optional)

Connect the Drive Activity LED cable to J6 pins 11 and 12 (see Figure 2), or
connect a drive ID and Drive Activity LED cable to J5, depending on host
system requirements.

5. Check the other available jumper settings

Select other options on J2 as illustrated in Figure 2. Do not change these
unless instructed to do so by the host system documentation.

6. Mount the drive in the host system and connect cables
Note. LC and LCV drives are designed to be atta ched to a carrier or t ray

and inserted into the host system without I/O or power cables.

a. Mount LW and LWV model drives to the host system’s chassis using

four 6-32 UNC screws. Two mounting holes are in each side of the drive
and there are four mounting holes in the bottom of the drive. Do not
over-tighten or force the screws. You can mount the drive in any orienta­tion.

b. Connect the SCSI I/O 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.

Note. For Ultra2 and faster operation, special twisted pair LVD cables are

required.

c. Connect the DC power cable to the drive. See Figure 3.

Figure 3. Cable connections and external termination

7. Format the drive

The drive has been low level for matted at the factory. Yo u do not need to
perform another low level format on this drive unless you decide to perfor m
certain diagnostics through the host adapter. If you do decide to perform a
low level format, do not abor t the format as this is likely to make the drive

inoperable. A low level format, with verify turned on, will typically take two
hours for ST373405 models and 90 minutes for ST336605 models.

Protect against power failure or other power interruptions during the format.
a. Turn on DC power to the host system.

b. Boot the system from a system floppy, CD, or from a previously installed

hard disc drive if there is one.

c. Format the drive.
Caution. Formatting a drive erases all user data. Be sure that you under-

stand 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. Seagate
is not responsible for lost user data.

Cheetah 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.

• Microsoft

TM

. Set the drive type in CMOS to “Zero,” “None,” or “No hard

drive installed.” Use FDISK.EXE and FORMAT.EXE. Systems using Win-
dows 98 or later can create one single partition (drive letter) on the drive.

• Macintosh

TM

. Use a third-party drive utility (most revisions of Apple’s HD

Setup utility only work with drives having special Apple firmware).

Troubleshooting

• Drive does not spin up. Check cables and all jumper settings. Make
sure cable pin 1 (edge stripe) matches PCB pin 1.

• Drive spins, but no LED on/off activity. Check SCSI ID setting. Set the
ID so that each device on the SCSI chain has its own unique ID. See also
the next item below. Host I/O controller is usually ID7.

• Computer does not seem to recogn ize the drive . Verify that the drive
is enabled by the SCSI host adapter setup utility.

• FDISK does not detect the drive. Run the FDISK program located on
your Windows startup diskette. Type fdisk/status to verify that your hard
drive is present.

Seagate support services

For online information about Seagate products, visit www.seagate.com or
email your disc questions to [e-mail]

If you need help installing your drive, consult your d ealer first. If you need
additional help, call a Seagate technical support specialist. Before calling,
note your system configuration and drive model number (ST373405LW/

LWV or ST373405LC/LCV).

Africa [phone] Norway 800-113 91
Australia 1800-14-7201 Poland 00 800-311 12 38
Austria 0 800-20 12 90 Spain 900-98 31 24
Belgium 0 800-74 876 Sweden 0 207 90 073
Denmark 80 88 12 66 Switzerland 0 800-83 84 11
France 0 800-90 90 52 Singapore 800-1101-150
Germany 0 800-182 6831 Taiwan [phone]
Hong Kong 800-90-0474 Thailand 001-800-11-0032165
Indonesia 001-803-1-003-2165 Turk ey 00 800-31 92 91 40
Ireland 1 800-55 21 22 United Kingdom 0 800-783 5177
Italy 800-790695 USA/Canada/ 1-800 SEAGATE or
Malaysia 1-800-80-2335 Latin America [phone]
Middle East [phone] Other European
Netherlands 0 800-732-4283 countries [phone]
New Zealand 0800-443988

Warranty. Contact your place of purchase or our web site (above).
Return Merchandi se Auth or ization (RMA). B efore re turning the dr ive, verify tha t it is

defective. Seagate Worldwide customer ser vice centers are the only facilities autho­rized to service Seagate drives. Contact nearest center for return procedures and trade
regulations.

Shipping the drive
Caution. Back up the data before shipping. Seagate assum es no responsibility for

data lost during shi pping or ser vice. Shi pping drive in an unapproved contai ner voids
the warranty. Pack the drive with original box and packing m aterials. Use no other
materials. This prevents electrical and physical damage in transit.

© 2001 Seagate Technology LLC All rights reserved
Publication number: 100109946, Rev. A, April 2001, Printed in U.S.A.

Seagate, Seagate Technology, and the Seagate logo are registered trademarks of
Seagate Technology LLC. Cheetah is a regi stered trademark of Seagate Te chnology
LLC. Other product names ar e registered trademar ks or trademar ks of their owners.

Seagate reser ves the right to chang e, without notice, product o fferings or specifica-

tions.

Enable parity check of SCSI bus.
Disable parity check.

J2

Pin 1

Reserved Positions

Parity Check option

Single-ended I/O

Terminator Power

Write protect = Off (enables writing).
Write protect = On (disables writing).

Write Protect option

Disable the Delay Motor Start option.
Motor start delay equal to the

SCSI ID multiplied by 12 seconds.

Delay Motor Start option (valid
only if the Enable Motor Start
jumper is not connected)

Enable motor start. The drive waits for
the Start Unit command from the host
before starting the spindle motor.

Disable motor start (default). The
drive starts according to the Delay
Motor Start option.

Motor Start option

Pin 1

End

SCSI I/O

Connector

Drive with
HDA up, PCB
down, viewed

from front

Pin 1

DC Power
Connector

J2

Drive Front

J6

J1

Pin 1

HDA

J6

A2A3A1A

0

Reserved
Remote

LED

L
E
D

R
E
S

Reserved

Shipped with cover installed.

Do not remove.

Do not install jumpers

on these four positions.

J6 Jumper

CATH

11

12

J2 Jumper

(default)

(default)

(default)

(default)

A jumper here forces single-ended
I/O operation.

No jumper allows host to select either
single-ended or LVD operation.

Host adapter or other device provides
term. power to external terminator.

Term. Power to SCSI Bus

(default)

(default)

Pin 1

(check your

adapter for

Pin 1 location)

Host

Adapter

PCB

Twisted Pair

LVD Cable

Ultra160 or Ultra2 LVD bus segment

SPI-2 compliant

active LVD

external terminator

on the end of

the cable

SCSI LVD/SE

SCSI SE

Ultra SCSI SE bus segment