Seagate Cheetah 18XL User manual

Cheetah 18XL Installation Guide
Model ST318404LW/LC and ST39204LW/LC SCSI interface disc drive
Publication Number: 75789507, Rev. B, August 2000
Handling precautions/Electrostatic discharge protection
• Disc drives are fragile. Do not drop or jar the drive and handle the drive
only by the edgesor 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 nearor 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 ST318404 ST39204
Formatted capacity ...................................... 18.352 Gbytes 9.176 Gbytes
Max. data blocks .......................................... 35,843,670 17,921,835
(222EE56h) (111772Bh)
Cylinders/heads (user accessible)................ 14,100/6 14,100/3
Disc rotation.................................................. 10,000 rpm 10,000 rpm
Operating voltages +5V +12V +5V +12V
Typical operating current............................ 1.00 0.95 0.80 0.75
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 automati-
cally or force it to operate in SE mode only. To configure this option, see Fig-
ure 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 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).
• Most ST318404 drives are factory set with the SCSI ID set at 0. If this is
theonly SCSI drive in your system and there are no other SCSIdevices 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 ST318404LC 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
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
PCBA
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 (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 drives are designed to be attached to a carrier or tray and inserted
into the host system without I/O or power cables.
Caution. Some mounting kits may contain screws that are too long to be
fully tightened without causing damage to the drive. The maximum
length for screws to extend into the drive mounting holes is 0.15
inch (3.82 mm), measured from the outer surface of the drive.
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.
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 per-
form another low level format on this drive unless you decide to perform cer-
tain 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 inoper-
able. A low level format, with verify turned on, will typically take up to one
hour.
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 sys-
tems. 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.
•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.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 ID 7.
•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 (ST318404LW,
ST318404LC, ST39204LW, or ST39204LC).
Africa [phone] Poland 00 800-311 12 38
Australia [phone] Spain 900-98 31 24
Austria 0 800-20 12 90 Sweden 0 207 90 073
Belgium 0 800-74 876 Switzerland 0 800-83 84 11
Denmark 80 88 12 66 Singapore [phone]
France 0 800-90 90 52 Taiwan [phone]
Germany 0 800-182 6831 Turkey 00 800-31 92 91 40
Hong Kong 800-90-0474 United Kingdom 0 800-783 5177
Ireland 1 800-55 21 22 USA/Canada/ 1-800 SEAGATE or
Italy 800-790695 Latin America [phone]
Middle East [phone] Other European
Netherlands 0 800-732-4283 countries [phone]
Norway 800-113 91
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 authorized
to service Seagate drives. Contact nearest center for return procedures and trade regu-
lations.
Shipping the drive
Caution. Back up the data before shipping. Seagate assumes no responsibility for
data lost during shipping or service. Shipping drivein 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.
© 1999, 2000 Seagate Technology, LLC All rights reserved
Publication number: 75789507, Rev. B, August 2000, 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.
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
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.
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