seagate CHEETAH 36XL INSTALLATION GUIDE

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Cheetah 36XL Installation Guide

Model ST336705LW/LC, ST318405LW/LC, ST39205LW/LC SCSI interface disc drive

Publication Number: 75789518, Rev. A, December 2000

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 ventilation 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.

Electromagnetic compliance

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

Drive characteristics

ST336705 ST318405 ST39205 LW/LC LW/LC LW/LC

Formatted capacity 36.704 Gbytes 18.352 Gbytes 9.176 Gbytes

Total # of data blocks 71,687,370 35,843,670 17,921,835

(445DCCAh) (222EE56h) (111772Bh)

Cylinders (user accessible) 19,036 19,036 19,036

Heads (user accessible) 8 4 2

Disc rotation +/- 5% 10,022 rpm 10,022 rpm 10,022 rpm

Operating voltages +5V +12V +5V +12V +5V +12V Typical operating

current 0.81A 0.75A 0.78A 0.60A 0.90A 0.56A

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 (not applicable to LC models)

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 differential (LVD) mode. This multimode capability provides backwards compatibility so you can use it with or without an LVD-capable 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 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 LVD drives on the same bus (cable) with high voltage

differential (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 Cheetah 36XL 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 bus (cable), 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 LW model drive, the ID may be set using either J6 or J5 (located on the rear of the drive).

• If you have an LC model drive, the host normally sets the ID over the I/O interface, so this step may be skipped.

• 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)

Reserved

A2A1A0A

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

Pin 1

68 Pin

SCSI I/O

Connector

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

Pin 1

not used

+5V

Ground

3A2A1

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 a 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 other end of the bus and internally terminated. You can configure your bus with another device on the other 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.

Drive HDA

J1

Pin 1

DC Power

4P 3P 2P 1P

(default)

(LW drives only)

Rear

PCBA

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

Reserved

Drive Front

DC Power Connector

HDA

L E D

Pin 1

A2A3A1A

Pin 1

End

Pin 1

J6 Jumper

J2 Jumper

R E S

Reserved Positions

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

Disable the Delay Motor Start option. The drive starts the spindle motor when power is applied.

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

Motor Start option

CATH

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

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

Write Protect option

Write protect = Off (enables writing).

Write protect = On (disables writing).

Parity Check option

Enable parity check of SCSI bus.

Disable parity check.

Single-ended I/O No jumper allows host to select either

single-ended or LVD operation.

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

Terminator Power Host adapter or other device provides

term. power to external terminator.

Term. Power to SCSI Bus

Pin 1

(default)

Figure 2. Option select jumpers.

4. Connect the drive acti v it y 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 availab le 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 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.

SCSI 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

Active ALT2 external terminator at the end

of the cable

SCSI SE bus segment

Twisted Pair

LVD Cable

Figure 3. Cable connections and external termination

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 during the format as this is likely to make the

drive inoperable. A low level format, with verification, will typically take two hours.

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

. 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

. 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. 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 email 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 (for example,

ST336705LW).

Africa +31-20-316-7222 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 +886-2-2514-2237 Hong Kong 800-90-0474 Thailand 001-800-11-0032165 Indonesia 001-803-1-003-2165 Turkey 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 +1-405-936-1234 Middle East +31-20-316-7222 Other European Netherlands 0 800-732-4283 countries +31-20-316-7222 New Zealand 0800-443988

Warranty. 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 all user 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.

© 2000 Seagate Technology LLC All rights reserved Publication number: 75789518, Rev. A, December 2000, Printed in U.S.A. Seagate, Seagate T echnology, the Seagate Logo, and Cheetah are either registered

trademarks or trademarks of Seagate Technology LLC. All other trademarks are the property of their respective owners.