Seagate ST318426LW User manual

Barracuda 18XL Installation Guide
Models ST318426LW/LC, ST318436LW/LC/LWV/LCV, ST39226LW/LC
and ST39326LW/LC/LWV/LCV SCSI interface disc drive
Publication Number: 75789511, Rev. A, October 1999
Electrostatic discharge protection–observe these cautions
Drive electronic assemblies are extremely sensitive to static electricity.
• Keep the drive in its antistatic container until you are ready to install it.
• You must wear a wrist strap and cable connected to ground. Discharge
static from all items near or that will contact the drive.
• Turn off the power before removing or installing the DC power cable.
• Do not remove any circuit boards from the drive.
• Never use an ohmmeter on any circuit boards.
Important handling precautions
• Always use forced-air ventilation when the drive operates. Operate drive in
ambient temperature specified in product manual, part number 77767535.
• Do not drop or jar the drive. Handle by edges or frame.
• Use great care when operating, installing, or removing the unit.
• Use caution when troubleshooting a unit that has voltages present.
• Turn off power to the unit before removing it.
• Make sure drive is not excessively hot before removing.
• Do not disassemble the drive as that will void the warranty.
• Return the entire drive for depot repair if any part is defective.
• Do not apply pressure or attach labels to circuit board or drive top.
Drive characteristics ST318426/436 ST39226/236
Formatted capacity 18.373 Gbyte 9.186 Gbyte
Max. data blocks 35,885,168 17,942,584
(2239070h) (111C838h)
Cylinders (user accessible) 14,384 14,384
Mean read/write power dissipation (typical) 8.5W 8.5W
Operating voltages +5V +12V +5V +12V
Typical operating current 1.4 .95 1.4 .95
Typical idle current .75 .50 .75 .50
Max. starting current (DC) 1.2 1.7 1.2 1.7
Max. peak starting current (AC) — 2.9 — 2.9
Multimode interface: Single-Ended (SE)/Low Voltage Differential (LVD)
Electromagnetic compliance and safety considerations
See Safety and Regulatory Agency Specifications, part number 75789512
(enclosed).
Initial setup information
SCSI bus identification (ID) jumpers
Each device on the SCSI bus must have a unique SCSI ID.
Note. Be sure to refer to your Host system I/O controller user’s manual for its
requirements for proper SCSI ID settings. Usually, the host system sets
the ID on “LC” and “LCV” models (80 pin I/O connector) over the I/O
interface, so ID jumpers are not needed.
Most Barracuda disc drives are factory set with the SCSI ID set at 0 (no jump-
ers installed). To change the SCSI ID, refer to Figure 1. Use the J6 (or J5)
jumper block to set the SCSI ID. To change the SCSI ID, install jumpers
(included in a bag) as shown in the illustration. Some systems connect a cable
to J5 to remotely set the ID and to operate the drive activity LED on the front of
the drive.
Drive Activity LED
Connect the Drive Activity LED cable to J6, or connect a drive ID and Drive
Activity LED cable to J5, depending on host system requirements.
Attaching cables and mounting the drive
Drive termination
An I/O line termination device is required at each end device on the SCSI
cable. Intermediate devices on the cable are not terminated (see Figure 3). In
some systems the I/O controller card is not at the end as shown. Refer to your
system or controller documentation to see how this is handled in your particu-
lar system.
Terminator power
The host system usually provides power for the terminators in the I/O cable.
However, your Barracuda drive can be set to provide terminator power to the
SCSI cable, if required, by adding a jumper at the TP position on J2. See
Figure 2. You will usually not need to add this jumper and can leave the drive
configured as shipped from the factory.
Figure 1. Setting the SCSI ID
I/O circuits and data path widths
Note. Make sure your system I/O controller circuit board has the proper I/O
circuits to communicate with this drive.
You may have to replace your old controller with a newer one having the
proper I/O circuits. This drive can operate in single ended mode (SE) with
older SE controllers, but possibly not in Low Voltage Differential mode (LVD).
Check your controller documentation.
Note. No High Voltage Differential (HVD) devices should be connected in the
I/O daisy chain with these low voltage (LVD) drives.
The SE jumper on J2 (see Figure 2) forces SE operation only. The host device
cannot override the SE jumper. If no jumper is installed the host can select
either SE or LVD operation via the I/O interface. Do not install an SE jumper
unless the system documentation requires it.
“LW,” “LC,” “LWV,” and “LCV” models have a “wide” (16-bit) SCSI data bus
rather than the standard (non-wide) 8-bit SCSI data bus. However, you can
use these wide drives on a standard (non-wide) 8-bit data bus. Be aware that
the unused lines must be terminated as well as the used lines. This requires a
special type of terminator device. The I/O bus can transfer data at a much
higher data rate in the LVD mode, but the system must be designed to accom-
modate a higher data rate.
Figure 2. Option select jumpers
SCSI ID 0 (default)
Jumper lug
(enlarged to
show detail)
6
Drive
Front
in 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 ower
J1
68 in
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
in 1
4321
CBA
in 1 +5VGround
(default)
Enable parity check of SCSI bus.
Disable parity check.
2in 1
Reserved ositions
arity Check option
Single-ended I/O
Terminator ower
Write protect Off (enables writing).
Write protect On (disables writing).
Write rotect 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
in 1
End
SCSI I/O
Connector
Drive with
HDA up, CB
down, viewed
from front
in 1
DC ower
Connector
2
Drive Front 6
in 1
HDA
6
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. ower to SCSI Bus
(default)
(default)

Other applicable option 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.
Note. Host need not be on the end. Another device can be on the end with the termina-
tor, with the host having no terminator. Plug in power cable as shown.
Figure 3. Cable connections to the drive
Mounting the drive and connecting cables
Do not touch any connector pins or components on the SCSI controller board
(PCB) without observing static-discharge precautions.
Always handle the drive by the frame only.
The drive may be mounted in any orientation (horizontally or vertically). You
must ensure that the drive receives adequate air flow for cooling.
1. Verify that ID and option select jumpers are correctly installed.
2. Mount “LW”and “LWV”model drives using four 6-32 UNC screws; two in
each side or four in the bottom of the drive.
3. “LC”and “LCV”model drives slide into grooves and plug into a mounted
80-pin backplane connector. Do not use cables for “LC”and “LCV”mod-
els.
4. Maximum length for screws to extend into the chassis mounting holes is
0.15 inch (3.81 mm), measured from the outer surface of the chassis.
Tighten screws evenly. Do not over-tighten or force the screws. They may
not be properly aligned or have metric threads. Back the screw out and try
again or get new screws.
5. Connect the 68-pin SCSI 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.
6. For LVD operation, twisted conductor-pair cables are required.
7. “LW”and “LWV”model drives receive DC power through a 4-pin connector
mounted next to the 68-pin SCSI connector. The output of a power supply
must meet SELV (safety extra low voltage) as defined in IEC 950. To con-
nect the DC power cable to the drive, insert the connector into the drive’s
4-pin DC power connector. See Figure 1. “LC”and “LCV”models power
goes through its 80-pin I/O connector.
8. Check all connections between the drive and the host system.
9. Replace the host system’s cover.
Formatting the drive
The drive has been low level formatted at the factory. Do not low level format
this drive again unless you need to perform certain diagnostics through the
host adapter. If you decide to perform a low level format, do not abort the for-
mat as this is likely to make the drive inoperable. Protect against power failure
or other power interruptions during the format. It may take up to one hour per
gigabyte to low level format the drive (18 hours). Do not reboot or otherwise
disrupt the process.
Warning. Formatting a drive erases all user data. Be sure that you understand
this principle before formatting any hard disc drive. It is not neces-
sary to format a drive that previously has been used to store data,
unless your intention is to erase all user data.
Note. Seagate is not responsible for lost user data.
1. Turn on DC power.
2. Boot the system from a system floppy disc or from a previously installed
hard disc drive if there is one.
3. Format the disc drive. Barracuda 18XL 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.
Quick reference desktop system notes
Note. Refer to your system or utility manual for detailed instructions.
•DOS. Set the drive type in CMOS to “Zero,” “None,” or “No hard drive
installed.”Use FDISK.EXE and FORMAT.EXE. Systems that have operating
system Windows 95 release 950B or later do not need to partition the drive
more than one time.
•Macintosh. Use a third-party drive utility (Apple’s HD Setup utility only works
with drives having special Apple firmware).
Troubleshooting problems
1. Drive does not spin up. Check cables and all jumper settings. Make sure
cable pin 1 (edge stripe) matches PCB pin 1.
2. 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
item 3 below. Host I/O controller is likely ID7.
3. Computer does not seem to recognize the drive. Verify that the drive is
enabled in the system CMOS or setup program. If not, select the Autode-
tect option and enable it.
4. 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 DiscSuppor[email protected]
If you need help installing your drive, consult your dealer first. If you need addi-
tional help, call a Seagate technical support specialist. Before calling, note
your system configuration and drive model number (ST318426LW/LC).
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 [phone] 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 regula-
tions.
Shipping the drive
Caution. Back up the data before shipping. Seagate assumes no responsibility for data
lost during shipping or drive repair. 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.
© 1999 Seagate Technology, Inc. All rights reserved
Publication number: 75789511, Rev. A, October 1999, Printed in U.S.A.
Seagate, Seagate Technology, the Seagate Logo, and Barracuda are either registered
trademarks or trademarks of Seagate Technology, Inc. All other trademarks are the prop-
erty of their respective owners.
Host Adapter
PCB
Cable Pin 1
(check your
adapter for Pin 1 location)
SCSI ID 1
SCSI ID 0
SCSI ID 7
2 through X
SCSI devices
Terminator
“LW”Model
Drive
Power
Cable