Seagate ST336752LW 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 automat-
ically 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.
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 with high voltage differen-
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).
• 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® X15 36LP 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.
• 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
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 termi-
nation 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 ter-
minating a SCSI Ultra2 bus operating in LVD mode.
• The host adapter is normally on the end of the bus and internally termi-
nated. 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.
SCSI ID = 0 (default)
Jumper Plug
(enlarged to
show detail)
J6
Drive
Front
Pin 1
Reserved
A2A1A0 A
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
A0
J5
Pin 1
4P 3P 2P 1P
Pin 1
+5VGround
(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
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 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 desk-
top system notes are provided below.
•MicrosoftTM.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.
•MacintoshTM.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 third-
party 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 [e-mail].
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
.
Africa [phone] New Zealand 0800-443988
Australia 1800-14-7201 Norway 800-113 91
Austria 0 800-20 12 90 Poland 00 800-311 12 38
Belgium 0 800-74 876 Spain 900-98 31 24
Denmark 80 88 12 66 Sweden 0 207 90 073
France 0 800-90 90 52 Switzerland 0 800-83 84 11
Germany 0 800-182 6831 Singapore 800-1101-150
Hong Kong 800-90-0474 Taiwan [phone]
India 1-600-33-1104 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 [phone]
Middle East [phone] Other European
Netherlands 0 800-732-4283 countries [phone]
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 service centers are the only facilities autho-
rized 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.
© 2002 Seagate Technology LLC All rights reserved
Publication number: 100139875, Rev. C, June 2002, Printed in U.S.A.
Seagate, Seagate Technology, 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.
J2
Pin 1
No Connection
Write protect = Off (enables writing).
Write protect = On (disables writing).
Write Protect option
Pin 1
SCSI I/O
Connector
Drive with
HDA up, PCB
down, viewed
from front
Pin 1
DC Power
Connector
J2
Drive Front
J6
Pin 1
HDA
J6
A2 A3A1A0
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.
CATH
11
12
(default)
Single-ended I/O
Forces single-ended operation.
Allows the host to select either
single-ended or LVD operation. (default)
LC Models
J2 Pin 1
LW Models
Single-ended I/O
Forces single-ended operation.
Allows the host to select either
single-ended or LVD operation. (default)
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. (default)
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.
(default)
Write Protect
Write Protect = Off (enables writing)
Write Protect= On (disables writing)
(default)
Parity Check
Enable parity check
Disable parity check
(default)
Terminator Power
Termination power to SCSI bus.
Host adapter or other device
provides termination power to
external terminator.
(default)
No Connection
Pin 1
(check your
adapter for
Pin 1 location)
Host
Adapter
PCB
Twisted Pair
LVD Cable
Ultra320, 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