Seagate ST251N,ST277N Product Manual
ST251N
ST277N
PRODUCT
MANUAL
&5>
Seagate
ST251 N/ST277N
Product Manual
March
6,
1987
36034-001, Revision B
920 Disc Drive, Scotts Valley, CA 95066-4544, USA
Telephone: 408/438-6550 e Telex: 176455 SEAGATE SCVL
659
Seagate
Copyright
Notice
This
manual and all the
material
contained in
it
are copyrighted with
all rights reserved. This manual
may
not be copied, in
whole
or
in
part,
without
written
consent of Seagate Technology.
Seagate reserves the
right
to change, without notice, the specifications
contained in this
manual.
IBM
PC/XT/AT are registered
trademarks
of International Business
Machines Corporation.
ii
ST251N/277N
Product
Manual,
Rev. B
CONTENTS
1.0 INTELLIGENT DISC DRIVE SPECIFICATION SUMMARY .
1-1
1.1
Drive
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.1.1 Formatted Capacity . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1.1.2Data0rganization
.........................
1-1
1.2
Performance
Specifications
. . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Access
Time
Definition and
Timing
. . . . . . . . . . . . . . . . . 1-2
1.4
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.5
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.6
Reliability
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.7
Environmental
Specifications
. . . . . . . . . . . . . . . . . . . . . 1-3
1.7.1
Ambient
Temperature
. . . . . . . . . . . . . . . . . . . . . . 1-3
1.7.2
Temperature
Gradient
. . . . . . . . . . . . . . . . . . . . . . 1-3
1.7.3
Relative
Humidity..........................
1-3
1.
7.4
Altitude
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.8 Shock and
Vibration
Specifications
. . . . . . . . . . . . . . . . . 1-4
1.8.1 Operating Shock . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.8.2 Operating
Vibration
. . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.8.3 Nonoperating Shock . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1.8.4 Nonoperating
Vibration
. . . . . . . . . . . . . . . . . . . . . 1-5
1.9
DC
Power
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.9.1
Input Noise
Ripple
and Frequency . . . . . . . . . . . . 1-6
1.10 Mounting
Requirements.........................
1-7
1.10.1 Shock
Mounting
Recommendations
. . . . . . . . . . 1-9
1.10.2 Handling and Static Discharge Precautions . . . . 1-9
1.111/0
Cable
Requirements
. . . . . . . . . . . . . . . . . . . . . . . .
1-11
1.11.1 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-11
1.11.2 Connector
Requirements
. . . . . . . . . . . . . . . . . . .
1-11
1.12 SCSI Bus
Drivers/Receivers
. . . . . . . . . . . . . . . . . . . . . 1-13
2.0 GENERAL
PRODUCT DEFINITION . . . . . . . . . . . . . . . . . .
2-1
2.1
SCSI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2.2
Intelligent
Disc
Drive
Configuration
. . . . . . . . . . . . . . . . . 2-2
2.2.1
SCSI Bus
Address
. . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 ST251N/277N
SCSI
Commands
. . . . . . . . . . . . . . . . . . . . 2-2
2.4
Error
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
ST251N/277N
Product
Manual,
Rev. B
iii
2.5 Disc Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.5.1 Formatting and Defect Management . . . . . . . . . . . 2-4
2.5.2 Record
Interleave . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.6 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2.7
Incoming Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.7.1
Enabling the Offline Selftest Routines . . . . . . . . . . 2-6
iv
ST251 N/277N
Product
Manual,
Rev. B
LIST OF ILLUSTRATIONS
Figure
1.
Typical RMS Start-up
Current
Profile . . . . . . . . . . . 1-6
Figure
2.
Mounting
Dimensions.
. . . . . . . . . . . . . . . . . . . . . . 1-8
Figure
3.
Host/Drive Interface
Connectors
. . . . . . . . . . . . . . 1-10
Figure
4.
Nonshielded Cable
Connector
......
, . . . . . . . . . 1-12
Figure
5.
50-Pin SCSI
Connector
Pin
Assignments
. . . . . . . . 1-12
Figure
6.
Command
Summary
. . . . . . . . . . . . . . . . . . . . . . . . 2-3
ST251
Nl277N Product Manual, Rev. B v
vi
ST251N/277N Product Manual, Rev. B
INTRODUCTION
This
manual supports the
ST251
N and ST277N
disc
drives.
These
drives
are
complete
hard
disc
subsystems
for
desktop comput-
ers and other systems
requiring
a rugged, half-height storage solution.
Seagate
intelligent
disc
drives
have an embedded
controller
which
supports the
small
computer
system interface (SCSI
command
set),
as defined by
ANSI X3T9.2/82-2,
for
self-configuring software.
Seagate
reliability
is a built-in feature. Our manufacturing
facilities
are designed and located
exclusively
for
the high-volume production
and testing of
disc
drives.
Our
commitment
to vertical integration en-
compasses
read/write
head assembly,
PC
board,
media
and
stepper
motor
manufacturing.
This
assures you of the latest technology, con-
sistent quality and the
lowest
possible cost.
For pricing and
delivery
information call:
Inside
California
1-800-468-DISK
Outside
California
1-800-468-DISC
ST251
Nl277N Product Manual, Rev. B
vii
viii
ST251 Nl277N
Product
Manual, Rev. B
Loading...