Seagate ST318452LW-LC, ST336732LW-LC, ST318432LW-LC, ST336752LW-LC User Manual

Cheetah X15 36LP Installation Guide

ST336752LW/LC, ST318452LW/LC, ST336732LW/LC, and ST318432LW/LC SCSI interface disc drives

Publication Number: 100139875, Rev. C, June 2002

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 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.

• 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.

Electromagnetic compliance

See Safety and Regulatory Agency Specifications, part number 75789512.

Drive characteristics

ST336752 and ST336732

Formatted capacity .......................................... 36.7 Gbytes

Max. data blocks ............................................. 71,687,369 (445DCC9h)

Cylinders and heads (user accessible) ............ 18,497/ 8 heads

Disc rotation ..................................................... 15K RPM

Operating voltages ........................................... +5V +12V

Typical operating current (in LVD mode) ....... 0.89A 0.98A

ST318452 and ST318432

Formatted capacity .......................................... 18.4 Gbytes

Max. data blocks ............................................. 34,843,670 (222EE56h)

Cylinders and heads (user accessible) ............ 18,497/ 4 heads

Disc rotation ..................................................... 15K RPM

Operating voltages ........................................... +5V +12V

Typical operating current (in LVD mode) ....... 0.88A 0.79A

What you need

• A SCSI host adapter

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

• An unused drive power connector (not applicable to LC models)

• A SCSI host adapter (sometimes called a SCSI interface card)

To operate at LVD transfer rates, use 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 differential (LVD) mode. This multimode capability provides backwards compatibility so you can use it with or without an LVD-capable host adapter. The 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 (or Ultra320 rates on the ST318432

and ST336732 models) 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.

and

Note. Some LVD host adapters provide an LVD connector

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 LVD drives on the same bus with high voltage differen-

tial (HVD) devices—drive damage may occur.

an SE con-

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).

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

• Most Cheetah

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.

• 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.

Drive Front

Jumper Plug

(enlarged to show detail)

SCSI ID = 0 (default)

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

Figure 1. Setting the SCSI ID

2. Configure termination

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 terminator 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 configure 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 drives normally provide termination power from the host adapter or other source. For this reason, LC model drives cannot be configured to provide termination power to the bus.

X15 36LP drives are factory set with the SCSI ID set at

68 Pin

Reserved

SCSI I/O

Connector

Pin 1

A2A1A

SCSI ID = 0

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

not used

+5V

Ground

Pin 1

3A2A1

Pin 1

4P 3P 2P 1P

(default)

DC Power

Drive HDA

Rear

Drive with HDA up, PCB down, viewed

from front

Reserved

Remote LED

Shipped with cover installed.

Do not remove.

Do not install jumpers

on these four positions.

SCSI I/O

Connector

LC Models

No Connection

Single-ended I/O

Forces single-ended operation.

Allows the host to select either single-ended or LVD operation.

Write Protect option

Write protect = Off (enables writing).

Write protect = On (disables writing).

Reserved

Drive Front

DC Power Connector

HDA

L E D

R E S

Pin 1

A2A3A1A

Pin 1

LW Models

Single-ended I/O

Forces single-ended operation.

Allows the host to select either single-ended or LVD operation.

Delay Motor Start (valid only if the Remote Motor Start jumper is not connected).

Disable Delay Motor Start.

Motor start delay equal to the SCSI ID multiplied by 12 seconds.

CATH

Remote Motor Start

Disable Remote Motor Start. The drive starts according to the Delay Motor Start option.

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

Write Protect

Write Protect = Off (enables writing)

Write Protect= On (disables writing)

Parity Check

Enable parity check

Disable parity check

No Connection

Pin 1

Terminator Power

Termination power to SCSI bus.

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

(default)

Pin 1

(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, or connect a drive ID and Drive Activity LED cable to J5, depending on the host system.

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 drives are designed to be attached to a carrier or tray and

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

a. Mount LW drives to the 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

required

cables are

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

Ultra320, Ultra160 or Ultra2 LVD bus segment

Pin 1

(check your

adapter for

Pin 1 location)

SCSI LVD/SE

Host

Adapter

PCB

SCSI SE

SPI-2 compliant

active LVD

external terminator

on the end of

the cable

Twisted Pair

LVD Cable

7. Format the drive

The drive has been

low level

formatted at the factory. You do not need to perform another low level format on this drive unless you decide to perform certain diagnostics through the host adapter. If you do decide to perform a low level format, do not abort the format as this is likely to make the drive inoperable. A low level format, with verify turned on, may take two hours.

Protect against power failure or other power interruptions during the format.

a. Turn on DC power to the host system and boot the system from a

system floppy, CD, or from a previously installed hard disc drive if there is one.

b. Format the drive.

Caution. Formatting a drive erases all user data. It is not necessary to for-

mat a drive that previously has been used to store data, unless your intention is to erase all user data. Seagate

is not responsi-

ble for lost user data. Cheetah X15 36LP 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

drive installed

. Set the drive type in CMOS to “

.” Use FDISK.EXE and FORMAT.EXE. Systems using Win-

Zero,” “None,”

or “

No hard

dows 98 or later can create one single partition (drive letter) on the drive.

• Macintosh

. Mac OS 8.6, 9.x and OS X: Use Apple’s Drive Setup utility

to partition and initialize the drive. Mac OS 8.5 or earlier: Use a thirdparty drive utility. For more information, refer to: www.apple.com

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. The host I/O controller is usually ID7.

• Computer does not seem to recognize 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 e-mail your disc questions to DiscSupport@Seagate.com.

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

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Warra nty. Contact your place of purchase or our web site (above). Return Merchandise Authorization (RMA). Before returning the drive, verify that 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 assumes no responsibility for

data lost during shipping or service. Shipping drive in an unapproved container voids the warranty. Pack the drive with original box and packing materials. Use no other materials. This prevents electrical and physical damage in transit.

Ultra SCSI SE bus segment

Figure 3. Cable connections and external termination

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