Epson SCSI Hard Disk Drive Owner's manual

EPSON
®
SCSI Hard Disk Drive
SCSI Festplattenlaufwerk
Le disque dur SCSI
Drive per disco Fisso SCSI
Unidad de disco duro con SCSI
Y72599100700

Trademark Acknowledgements
EPSON is a registered trademark of Seiko Epson Corporation
Notice
All rights reserved. Reproduction of any part of this manual in any
form whatsoever without Epson’s express written permission is
forbidden.
The contents of this manual are subject to change without notice.
All efforts have been made to ensure the accuracy of this manual.
However, should any errors be detected, Epson would greatly
appreciate being informed of them.
The above notwithstanding, Epson can assume no responsibility for
any errors in this manual or their consequences.
Copyright © 1991 by SEIKO EPSON CORPORATION
Nagano, Japan

Introduction
The Epson
®
34OMB SCSI hard disk drive is a high capacity, high
performance, random access storage device designed to be installed in
your EISA Series (desktop or tower) computer.
This manual provides information you need to know to install the SCSI
hard disk drive in your computer, and lists the technical specifications
for the drive. Make sure you read all the information in this booklet
before you install the drive.
computer in the United Sta
port and service through a
rs and Customer Care Ceti
We ask that you contact
Epson product to
Support Center for assistance wil
operation of Epson products,
between 790 a.m. and 4:OO~
For
call
your computer outside of lease
rketing location nearest you fo
onal marketing locations are listed:
Ibf this manual’s back cover.
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;ou can call Epson’s Technical
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$949, Monday through Friday
2are Center,
arest Epson
er Information Center at (2

First make sure you have all of the following items:
n Epson 340MB SCSI hard disk drive
n Four retaining screws
n The SCSI ribbon cable and LED cable that came with your SCSI
adapter card
n The twist wire tie for fastening the cable.
If anything is missing or damaged, contact your dealer.
Before you install the SCSI hard disk drive in your computer, make
sure you perform the following procedures in the order listed here:
n Install the SCSI adapter card. See your SCSI Adapter Card User’s
Guide for instructions.
n Check the jumper settings on the SCSI drive as described on page 4
of this manual.
H Adjust the terminators on the SCSI drive as described on page 7 of
this manual.
After performing these procedures, you can install the SCSI hard disk
drive in your Epson computer; just follow the procedures described in
your computer User’s Guide to install a disk drive. Also see your SCSI
Adapter Card User’s Guide for details on installing an internal SCSI
device.
As you install the SCSI hard disk drive, refer to the illustration on the
following page to identify the different parts.
2

E

Before installing the SCSI hard disk drive, you need to check the
jumper settings on the drive. The jumpers determine the following
settings:
H SCSI ID of the drive (J6)
n Parity checking (J6)
n Drive power-up (J6)
n SCSI bus signals (J7)
n Terminator power (J8).
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J6
1
3
5
7
9
11
El
00
l-m
El
00
I
00
w
lool
2
4
6
8
10
12
J7
The jumper labeled J7 controls the type of bus signals used by the SCSI
adapter. Pins 3 and 4 must have a jumper installed and all other pins
must be off; this indicates that the SCSI interface is singled-ended. Do
not change this jumper setting.
Jumper J8 determines whether the hard disk drive or the SCSI interface
powers the terminators on the drive. The hard disk drive is shipped
with jumper J8 installed so that the hard disk drive automatically
provides power to the terminators. You should not remove this jumper.
4
Installing the Drive

SCSI ID selection
Pins l-2, 3-4, and 5-6 of jumper J6 determine the SCSI ID as shown in
the table below.
1 SCSI ID 1 Pins 1-2
1 Pins 3-4 1 Pins 5-6 1
o*
0 0 0
1
X 00
2
0 X
0
3X
X
0
4
0 0
X
5
X 0
X
6
0 XX
X = Jumper installed
0 = No jumper
* = Factory setting
The factory setting for the hard disk drive is SCSI ID 0.
SCSI ID 7 is reserved for the SCSI adapter card.

Pins 7-8 on jumper J6 control odd parity checking by the drive as
shown in the table below.
Pins 7-8
X = Jumper installed
0 = No jumper
* = Factory setting
Set J6 to enabled if the devices connected to the SCSI adapter card
support parity checking. If one or more devices connected to the SCSI
adapter card do not support parity checking, set the jumper to disabled.
Drive power-up
Pins 9-10 on jumper J6 control when the hard disk drive receives power
as shown in the table below.
I
Drive receives power
I
Pins 9-10
I-
When computer is tumed on*
I
X
I
At first START
r
comman
d from
initiator
0
X = Jumper installed
0 = No jumper
* = Factory setting
Do not change the factory setting of this jumper.
6
Installing the Drive

Terminator Settings
For SCSI devices to communicate properly with each other, the SCSI
interface requires special resistor packs known as terminators. These
terminators reduce the echo, standing waves, and interference along the
SCSI interface.
The first and last devices on a SCSI interface must be terminated. The
devices in between must not be terminated.
If you install the SCSI hard disk drive in the middle of the SCSI
interface, you must remove all three terminator resistors on the drive.
When replacing the resistors, make sure pin 1 is aligned correctly.

Technical Specificafions
Performance Specifications
Capacity unformatted
per drive: 402MB
per surface: 57.4MB
Capacity formatted
per drive: 340,558,848 bytes
per surface: 48,651,264 bytes
Average latency: 8.3 msec
Seek time
single track read: 2.5 msec
single track write: 3.0 msec
average read: 15 msec
average write:
15 msec
full stroke: 30 msec
SCSI overhead:
600 w
SCSI transfer rate/buffer to host
asynchronous: 5 MB/sec
synchronous: 6 MB/sec
Buffer size: 32/128K
8
Technical Specifications

Environmental Specifications
Ambient temperature
operating:
41’ to 122O F (5O to 50” C)
nonoperating:
-40’ to 149’ F (-40” to 65’ C)
Relative humidity
operating:
5 to 80% noncondensing
nonoperating: 5 to 80% noncondensing
Elevation: -1,000 ft. to 10,000 ft.
Vibration, all axes
operating:
0.5G
nonoperating: 1G
Physical Specifications
Height: 1.625 in. (41.3 mm)
Width: 5.813 in. (147.6 mm)
Depth: 6.750 in. (171.5 mm)
Weight: 2.2 lbs. (0.99 kg)

EPSON
Printed in USA 91.8~2 (CT-01)