Quantum STT20000A User Manual
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STT20000A
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ATAPI Minicartridge Drive
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Product Manual
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© 1998 Seagate Technology, Inc. All rights reserved
No part of this publication may be reproduced in any form without written permission from Seagate
Technology, Inc.
Publication Number
Seagate, Seagate Technology, the Seagate logo and Sidewinder are trademarks or registered trademarks of
Seagate Technology, Inc. Other product names are trademarks or registered trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings or specifications. Seagate Technology
provides this manual "as is," without warranty of any kind, either expressed or implied, including, but not limited to,
the implied warranties of merchantability and fitness for a particular purpose. Seagate Technology assumes no
responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any problem that
might arise from the use of the information in this manual.
10005136-001
, March 1998
FCC Notice
This equipment generates and uses radio frequency energy and, if not installed and used properly—that is, in strict
accordance with the manufacturer's instructions—may cause interference to radio communications or radio and
television reception. It has been tested and found to comply with the limits for a Class B computing device in
accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection
against such interference in a residential installation. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause interference to radio or television reception, which can be
determined by turning the equipment on and off, you are encouraged to try to correct the interference by one or
more of the following measures:
• Reorient the receiving antenna.
• Relocate the computer with respect to the receiver.
• Move the computer into a different outlet so that the computer and receiver are on different branch
circuits.
If necessary, you should consult the dealer or an experienced radio/television technician for additional suggestions.
You may find the following booklet prepared by the Federal Communications Commission helpful:
and Resolve Radio-TV Interference Problems
This booklet (Stock No. 004-000-00345-4) is available from the U.S. Government Printing Office, Washington, DC
20402.
How to Identify
Caution
. Changes or modifications made to this equipment which have not been expressly approved
by Seagate Technology may cause radio and television interference problems that could void
the user's authority to operate the equipment.
Further, this equipment complies with the limits for a Class B digital apparatus in accordance with Canadian Radio
Interference Regulations.
Cet appareil numérique de la classe B est conforme au Règlement sur brouillage radioélectrique, C. R. C., ch.
1374.
Additional warnings:
•
To prevent fire or electrical shock hazard, do not expose the unit to rain or moisture.
•
To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel.
Important Information About This Manual
All information contained in or disclosed by this document is considered proprietary by Seagate Technology. By
accepting this material, the recipient agrees that this material and the information contained therein are held in
confidence and in trust and will not be used, reproduced in whole or in part, nor its contents revealed to others,
except to meet the purpose for which it was delivered. It is understood that no right is conveyed to reproduce or
translate any item herein disclosed without express written permission from Seagate Technology.
Seagate Technology provides this manual "as is," without warranty of any kind, either expressed or implied,
including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Seagate
Technology reserves the right to change, without notification, the specifications contained in this manual.
Seagate Technology assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this
manual, nor for any problem that might arise from the use of the information in this manual.
Table of Contents
Table of Contents
Introduction 1
Drive overview........................................................................................................ 1
Features.................................................................................................................3
Typical system configurations................................................................................. 4
Minicartridge technology overview........................................................................... 4
Flash EEPROM...................................................................................................... 5
Software.................................................................................................................5
References............................................................................................................. 5
About this manual...................................................................................................6
Specifications 7
Overview ................................................................................................................ 7
Physical specifications............................................................................................7
Power specifications............................................................................................... 9
Performance specifications................................................................................... 10
Environmental requirements ................................................................................. 11
Reliability.............................................................................................................. 12
Mean-Time-Between Failures.........................................................................12
Mean-Time-To-Repair .................................................................................... 12
Recommended tapes............................................................................................ 13
Regulatory compliance.......................................................................................... 13
Installation 15
Introduction........................................................................................................... 15
Before you begin................................................................................................... 15
Handling guidelines......................................................................................... 15
Setting jumpers..................................................................................................... 16
Installing the drive................................................................................................. 17
Mounting dimensions............................................................................................ 18
ATA-2 Interface pin assignments.......................................................................... 20
Drive operation and maintenance 23
Introduction........................................................................................................... 23
Front panel LED.................................................................................................... 23
Using Travan cartridges........................................................................................ 24
Loading and unloading cartridges ................................................................... 24
STT20000A Product Manual Page v
Table of Contents
Setting the write–protect switch ...................................................................... 25
Loading revised firmware via Seagate firmware cartridge...................................... 26
Drive maintenance................................................................................................ 27
Caring for tape cartridges ............................................................................... 27
Cleaning the drive read/write head.................................................................. 27
Troubleshooting.................................................................................................... 28
ATAPI interface 31
Introduction........................................................................................................... 31
ATA-2 Interface .................................................................................................... 31
ATA-2 Signals ................................................................................................ 31
DASP-...................................................................................................... 31
PDIAG-.................................................................................................... 31
ATA registers ................................................................................................. 32
Status Register......................................................................................... 32
Error Register........................................................................................... 33
Feature Register ...................................................................................... 33
Supported ATA Commands............................................................................ 34
Execute Drive Diags (90h)........................................................................ 34
Idle Immediate (E1h)................................................................................ 34
Standby Immediate (E0h)......................................................................... 34
Check Power Mode (E5h)......................................................................... 34
Sleep (E6h).............................................................................................. 34
Set Features (EFh)................................................................................... 35
ATAPI Identify Device (A1h)..................................................................... 36
ATAPI Packet Command (A0h)................................................................ 37
ATAPI Soft Reset (08h)............................................................................ 37
ATAPI interface .................................................................................................... 38
Reserved Fields.............................................................................................. 39
Erase command.................................................................................................... 40
Inquiry command.................................................................................................. 41
Load/Unload command......................................................................................... 42
Locate command.................................................................................................. 43
Log Select command............................................................................................ 44
Log Sense command............................................................................................ 45
Error Counter Page (Read)............................................................................. 46
Tape Capacity Page Code.............................................................................. 47
Mode Select command ......................................................................................... 49
Mode Sense command......................................................................................... 50
Mode Parameter Header ................................................................................ 50
Page vi STT20000A Product Manual
Table of Contents
Mode Block Descriptor.................................................................................... 51
Mode Medium Partition Page.......................................................................... 52
Mode Capabilities and Mechanical Status Page.............................................. 52
Mode Tape Parameters Page......................................................................... 53
Read command .................................................................................................... 54
Read Position command....................................................................................... 55
Request Sense command..................................................................................... 57
Rewind command................................................................................................. 59
Space command................................................................................................... 60
Test Unit Ready command.................................................................................... 61
Write command .................................................................................................... 62
Write Filemark command...................................................................................... 63
Write Buffer (download microcode) command....................................................... 64
Tape format 65
Introduction........................................................................................................... 65
Tape partitioning................................................................................................... 65
Track positions ..................................................................................................... 65
Track numbering................................................................................................... 66
Track format......................................................................................................... 66
Frames........................................................................................................... 66
Blocks ............................................................................................................ 68
Tape reference servo pattern................................................................................ 68
Write equalization ................................................................................................. 69
Randomization...................................................................................................... 69
Theory of operations 71
Overview .............................................................................................................. 71
Block diagram....................................................................................................... 71
Drive mechanisms ................................................................................................ 72
Mechanics...................................................................................................... 72
Cartridge-load mechanism.............................................................................. 72
Capstan/drive-motor assembly ....................................................................... 72
Chassis .......................................................................................................... 72
Control circuits...................................................................................................... 72
Head design ......................................................................................................... 73
Flash EEPROM.................................................................................................... 73
Sensors and switches........................................................................................... 73
Drive media (Travan minicartridges)...................................................................... 74
STT20000A Product Manual Page vii
Table of Contents
Glossary 75
Acronyms and measurements 78
Acronyms and abbreviations................................................................................. 78
Units of measurement........................................................................................... 80
Page viii STT20000A Product Manual
Introduction Chapter 1
Introduction
1
Drive overview
The Seagate STT20000A extends the Seagate family of one-inch high, DC2000
drives that feature high performance, high reliability, and quiet operation. The drive
transfers data at up to 60 megabytes per minute (Mbytes/min) without compression.
With optimal system resources and compressible data structures, nominal transfer
rates of up to 120 Mbytes/min can be observed using software data compression
(assumes 2:1 compression ratio).
System optimizations include but are not limited to allocating the maximum amount
of the base 640 Kbytes of memory available
Data compression is available within the Seagate Backup software package for
DOS and Windows and typically provides for up to a 2:1 compression ratio. The
compression ratio is dependent on the specific system and the nature of the files
being compressed.
This drive optimizes throughput through the Seagate feature FastSense
feature enables the drive to automatically sense the fastest supportable data
transfer rate of the host system and choose a transfer speed of either 1,000, 733, or
489 kilobytes/second (Kbyte/sec). This process maximizes system throughput by
eliminating tape repositioning, which is typically required when the tape drive
operates faster than the host computer.
The product is available as an internal device in either a 3.5-inch or half-high 5.25inch configuration. The drive form factors are tailored for easy installation in today's
computers.
The drive supports the QIC-3220-MC format standard and will provide 10 gigabytes
uncompressed storage capacity, 20 gigabytes compressed, with a Travan TR-5
cartridge.
The drive will also read tapes conforming to the QIC-3095 standard.
A precision burst intelligent positioning system is used to achieve high track
densities.
TM
. This
STT20000A Product Manual Page 1
Chapter 1 Introduction
The STT20000A conforms to the QIC-3220-MC development standard adopted by
Quarter-Inch Cartridge Drive Standards Inc. (QIC). The drive records in a serpentine
fashion utilizing a 1,7 RLL (Run Length Limited) data encoding method, and
provides for 108 data tracks and one (1) directory track on Travan TR-5 media.
The drive offers electronically erasable, programmable, read-only memory (flash
EEPROM), which enables qualified Seagate OEMs to download revised firmware to
the drive.
With the availability of greater capacity disk drives and the growth of small networks,
the need for cost-effective, high-capacity storage has grown. The STT20000A is
ideal for high-end standalone computers, workstations, and small networks.
Built using long-wearing materials and custom Large Scale Integration (LSI)
components, the ATAPI drive was engineered for heavy-duty computer applications.
Providing carefully controlled tape handling and rapid, smooth operation, the design
promotes long life for key components such as the motors, drive heads, and the
media itself. One major benefit of this new, computer grade engineering is low
power consumption.
Figure 1-1 illustrates the STT20000A ATAPI minicartridge internal drive. Figure 1-2
illustrates the internal drive equipped with mounting brackets.
Figure 1-1
STT20000A internal drive without mounting brackets
Page 2 STT20000A Product Manual
Introduction Chapter 1
Figure 1-2
Internal STT20000A with mounting brackets
Features
The STT20000A embodies Seagate 's commitment to engineer reliable and durable
tape drive products. Key features of the drive are as follows:
• Internal form factor for installation in a 5.25-inch half-high or 3.5-inch by one-
inch space
• Capability to write and read Travan TR-5 (QIC-3220-MC) media, as well as read
TR-4 media conforming to the QIC-3095 standard
• QIC-3220-MC tape format compliance for compatibility and information
interchange
• Typical uncompressed capacities of 10 gigabytes on 740 foot TR-5 media
• Typical compressed capacities of 20 gigabytes on 740 foot TR-5 media
• Transfer rate optimized with
supportable data transfer rate (1,000, 733, or 489 Kbyte/sec)
• ATAPI interface that supports DMA and PIO modes 0, 1, or 2 with 512 Kbytes
on-drive data buffer to facilitate the most efficient use of the host computer and
tape drive.
• Uncorrectable error rate of less than 1 in 10
• Flash EEPROM to enable electrically upgradeable drive firmware
• Custom Seagate -designed LSI circuitry to reduce component count and boost
drive reliability
FastSense
—automatic selection of fastest
15
bits
• Low power consumption—less than 15.0 Watts (typical) for internal drives
STT20000A Product Manual Page 3
Chapter 1 Introduction
Typical system configurations
The Enhanced IDE standard supports up to four ATAPI peripherals: two devices on
the primary port and two devices on the secondary port. Of the two devices, one
must be slave to the other, which is the master. Figure 1-3 shows sample
configurations for two ATAPI systems.
Figure 1-3
Sample ATAPI configurations
Computer
system
Computer
system
Enhanced
IDE
controller
Enhanced
IDE
controller
Acculogic
IDE
controller
Primary
IDE bus
Secondary
IDE bus
Primary
IDE bus
Secondary
IDE bus
Hard
disc
CD-ROM
(master)
STT20000A
(slave)
Hard
disc
STT20000A
Minicartridge technology overview
Having evolved from the original mass-storage medium—reel-to-reel, 1/2-inch tape
storage—the minicartridge technology of today offers fast, efficient, high-capacity
storage in a compact, easy-removable hard-shell package. In little more than a
decade, storage capacities have increased from some 60 megabytes (Mbytes) on 9
tracks (QIC-24, 1982) to the to the 20 Gbyte capacity achievable with the
STT20000A minicartridge drive on a single Travan TR-5 cartridge.
The streaming-tape intelligence in the STT20000A provides a continuous tape
motion with an uninterrupted, precisely coordinated flow of data to and from the
minicartridge. This "streaming" motion combined with the "serpentine" recording
method is one element that contributes to the increased storage capacities,
efficiency, and speed of today's minicartridge technology.
Use of the "serpentine" recording method exploits the bi-directional capabilities of
the cartridge. With this method, the tape is not rewound at the end of a track.
Page 4 STT20000A Product Manual
Introduction Chapter 1
Instead, the write-read heads are logically or mechanically switched to a different
position on the tape and another track is written or read in the reverse direction.
That is, the drive first records track 1 in one direction and when the end of the tape
is reached, the head is moved and the direction of tape motion is reversed to record
track 2. This serpentine process continues until the entire tape is recorded. The
individual tracks are sequential to minimize the amount of head motion as the heads
change position for each track.
Flash EEPROM
The STT20000A incorporates leading-edge technology in the flash EEPROM, which
is useful should the drive's firmware need to be upgraded at some point. With the
permanently installed, electrically upgradeable, flash EEPROM memory, revised
firmware for the drive can be loaded via any one of two methods:
• Seagate OEM firmware cartridge (See chapter 4)
• Host IDE bus
This feature enables qualified OEMs needing to revise the drive firmware to do so
rapidly and at a reduced cost. Flash EEPROM should also prolong the life cycle of a
drive because many new techniques—such as increasing the capacity of the drive
through support for longer tapes—may require only a firmware upgrade.
Software
References
The STT20000A is a cost-effective means of backing up fixed disks. The drive is
compatible with DOS
Microsoft Windows 95, or Windows NT and will operate with many of the popular
backup software applications such as Seagate 's Backup for DOS and Windows,
Windows 95, NetWare, or Windows NT.
The following standards documents describe some of the technology incorporated in
the drives referenced in this manual.
•
QIC-170
•
QIC-157
•
QIC-3095-MC
•
QIC-3220-MC
For more information about a particular QIC standard, contact Quarter-Inch
Cartridge Standards, Inc., c/o Freeman Associates, 311 East Carrillo Street, Santa
Barbara, California 93101.
—Preformatted magnetic minicartridge
—ATAPI command set for streaming tape
TM
version 5.0 or later, Microsoft WindowsTM 3.1 or later,
—Serial recorded magnetic tape minicartridge (TR-4)
—Serial recorded magnetic tape minicartridge (TR-5)
STT20000A Product Manual Page 5
Chapter 1 Introduction
About this manual
The remaining chapters and the appendices in this manual are briefly described in
the following table. A glossary of terms is also included.
Chapter Title Description
2
3
4
5
6
7
Appendix A
Appendix B
Specifications Contains physical, performance, environmental,
reliability, power, and minicartridge specification
tables.
Installation Provides cautions, unpacking tips, inspection
information, and installation/connection steps
including cabling requirements and connector
pinouts.
Drive operation and
maintenance
ATAPI Interface Lists general information about the interface.
Tape format Provides an overview of the QIC-3220 tape
Theory of operation Details the functional operation of various
Glossary Defines key terms.
Acronyms and
measurements
Explains the simple operation of the drive.
format.
assemblies of the ATAPI drive.
Lists the acronyms and measurements used in the
manual.
Page 6 STT20000A Product Manual
Specifications Chapter 2
Specifications
2
Overview
The STT20000A provides exceptional reliability in storing large amounts of
computer data. This chapter includes the following specifications and requirements:
• Physical specifications
• Power requirements
• Drive performance specifications
• Environmental requirements
• Recommended tapes
• Tape capacities and formats
• Regulatory compliance
Physical specifications
The physical specifications of the STT20000A are listed in the following table.
Specification
Height
Width
Length
Weight
Figures 2-1 and 2-2 show the general dimensions of the STT20000A in 3.5-inch
configuration (without mounting brackets) and in the 5.25-inch configuration (with
mounting brackets).
Drive for 3.5-Inch
Mount
1.0 in/ 25 mm 1.7 in/ 43 mm
4.0 in/102 mm 5.87 in/149.1 mm
6.36 in/161.5 mm 6.51 in/165.5 mm
1.0 lbs/0.5 kg 1.5 lbs/0.7 kg
Drive for 5.25-
Inch Mount
STT20000A Product Manual Page 7
Chapter 2 Specifications
Figure 2-1
STT20000A (3.5-Inch mount) general dimensions
4.00 in (101.6 mm)
6.36 in (161.5 mm)
0.157 in
(4 mm)
4.00 in (101.6 mm)
1.00 in
(25.4 mm)
Figure 2-2
STT20000A (5.25-Inch mount) general dimensions
0.86" (21.8mm)
5.76" (146.4mm)5.49" (139.4mm)
0.20" (5.0mm)
5.87"
(149.0mm)
DRIVE ACTIVE
(GREEN)
1.685"
(42.8mm)
Page 8 STT20000A Product Manual
Specifications Chapter 2
Power specifications
The following table lists the power specifications for the STT20000A. (Power
specifications are measured at the tape drive power connector and are nominal
values.)
Specification Measurement
DC Voltage
Voltage Tolerance
Operational Current
Standby Current
Peak
Power Sequence
Ripple (peak to peak)
Power use
(nominal)
+12 VDC +5 VDC
± 10% ± 5%
2.0 amps 1.0 amp
0.2 amp 0.6 amp
2.2 amps max. —
None None
≤
100 mV
< 15 Watts
(excluding surge)
≤
100 mV
< 15 Watts
(excluding surge)
The following table lists pin assignments for the power connector for the drive.
Pin Assignment
1
+12 VDC
2
3
4
STT20000A Product Manual Page 9
+12 return
+5 return
+5 VDC
Chapter 2 Specifications
Performance specifications
The following table lists the performance specifications for the STT20000A.
Feature Specification
Capacity
Effective backup rate
Data transfer rate
Tape speed
Read/Write
Search/Rewind
Recording method
Recording format
Recording code
Error recovery
Recording unrecoverable
errors
10.0 gigabytes—1650 Oe 740' Travan cartridge
(uncompressed)
20.0 gigabytes—1650 Oe 740’ Travan cartridge
(compressed)
up to 60 Mbytes/min native; up to 120 Mbytes
/min compressed
489 / 733 / 1,000 Kbytes per second
46, 70, or 94 ips
90 ips maximum
Serpentine
QIC-3220-MC
1,7 RLL
Reed Solomon ECC
15
Less than 1 in 10
data bits
FastSense
Head configuration
Recording media
Cartridge size
Data density
Tracks
Page 10 STT20000A Product Manual
Wide write/narrow read
1650-Oe 740' Travan TR-5
3.2 in. x 2.4 in. x 0.4 in. (81 mm x 61 mm)
100,400 bits per inch
107 data tracks, one (1) directory track
Specifications Chapter 2
Environmental requirements
The following table lists the environmental specifications for the STT20000A. The
drive may be mounted either vertically or horizontally.
Specification Operational Non-operational
Temperature
Thermal gradient
Relative humidity
Maximum wet bulb temperature
Altitude
Vibration
Peak to Peak
Displacement
Peak Acceleration
Acoustic level operational
(A-wt sum)
1° t
o +113° F
+4
(+ 5° to + 45° C)
1° C per minute
1
–40° to +149
(–40° to + 65oC)
20° C per hour
oF2
(no condensation)
20% to 80%
non-condensing
1
5% to 95%
non-condensing
2
78.8° F (26° C) No condensation
–1000 to +15,000 feet –1000 to +50,000 feet
0.005 in. max.
(5 to 44.3 Hz)
0.50 g max.
(44.3 to 500 Hz)
55 dBA maximum
0.1 in. max.
(5 to 17 Hz)
1.5 g max.
(17 to 500 Hz)
—
(measured in suitable
enclosure at 3-ft distance
and operator height)
Shock (1/2 sine wave)
1
Specification applies to drive mechanism and media
2
Specification applies to drive mechanism only
2.5 g’s peak, 11 msec 100 g's peak, 11 msec
STT20000A Product Manual Page 11
Chapter 2 Specifications
Reliability
The STT20000A is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Feature Specification
Non-recoverable error rate < 1 in 1015 bits
Error recovery and control Reed-Solomon Error Correction Code techniques
Error monitoring and reporting (Error Log)
Media pre-written
Retry on read
Data randomization
Mean-Time-Between-Failures
(MTBF)
Mean-Time-To-Repair (MTTR) Less than 0.33 hour
Mean-Time-Between Failures
The Mean-Time-Between Failures (MTBF) is greater than 200,000 hours. This
specification includes all power-on and operational time but excludes maintenance
periods. Operational time is assumed to be 20% of the power-on time. Operational
time is the time the tape is loaded.
Note:
Seagate does not warrant the stated MTBF as representative of any
particular unit installed for customer use. The failure rate quoted here is
derived from a large database of test samples. Actual rates may vary from
unit to unit.
Mean-Time-To-Repair
The Mean-Time-To-Repair (MTTR) is the average time required by as qualified
service technician to diagnose a defective drive and install a replacement drive. The
MTTR for the drive is less than 0.33 hour (20 minutes).
More than 250,000 hours
The STT20000A is a field replaceable unit. If a problem occurs with a subassembly
or component in the drive, the entire unit should be replaced. The faulty drive should
be returned to the factory in its original packaging. Contact your distributor, dealer,
your computer system company, or your Seagate sales representative to arrange
the return.
Page 12 STT20000A Product Manual
Specifications Chapter 2
Recommended tapes
The STT20000A uses pre-formatted minicartridges. The following cartridges are
recommended:
Description Seagate 3M/Imation
Travan—740 ft (QIC-3220-MC)
10.0 GB capacity
(20.0 GB capacity with data compression)
Note. The STT20000A reads and writes the QIC-3220-MC format.
The STT20000A reads (but does not write) the QIC-3095-MC format.
Regulatory compliance
The STT20000A complies with the regulations listed in the following table.
Agency Regulation
CSA
TUV & IEC-RHEINLAND
UL
Canadian Dept. of Communications
EN55022 (CISPR-22)
with additional CE-Mark test requirements
20000TT TR-5
C22.2, No. 950-M89
EN 60 950/IEC 950
1950
Class B
Class B
FCC
Class B, Part 15
Use the STT20000A only in equipment where the combination has been determined
to be suitable by an appropriate certification organization (for example, Underwriters
Laboratories Inc. or the Canadian Standards Association in North America). You
should also consider the following safety points.
• Install the drive in an enclosure that limits the user's access to live parts, gives
adequate system stability, and provides the necessary grounding for the drive.
• Provide the correct voltages (+5 VDC and +12 VDC) based on the regulation
applied—Extra Low Voltage (SEC) for UL and CSA and Safety Extra Low
Voltage for BSI and VDE (if applicable).
STT20000A Product Manual Page 13
Chapter 2 Specifications
Notes
Page 14 STT20000A Product Manual
Installation Chapter 3
Installation
3
Introduction
This chapter explains how to install the STT20000A. The following paragraphs
briefly outline the organization of this chapter.
Before you begin
Handling guidelines
• The following section,
should read before you begin the installation.
•
Setting jumpers
•
Installing the drive
Because the drive unit can be damaged by electrostatic discharge, an electrostatic
grounding strap is recommended. This strap prevents an electrostatic discharge
from damaging the electronic components on or in the drive unit
If you do not have an electrostatic grounding strap, perform the installation at a
static-safe workstation. If one is not available, follow these guidelines as you install
the drive unit:
• Work in an uncarpeted area.
• To protect the
anti-static bag until you are ready to install it.
drive from static electricity, DO NOT remove the drive from its
Before you begin
shows the master/slave jumpers and describes their uses.
explains how to mount the internal drive unit.
contains general information that you
• Before you remove the drive from the anti-static bag, touch a metal or grounded
surface to discharge any static electricity buildup from your body.
Caution:
• Hold the drive by the edges only. Avoid direct contact with any printed circuit
• Lay the drive only on top of its anti-static bag or return the drive to its bag when
Caution:
STT20000A Product Manual Page 15
If you touch static-sensitive parts of the drive (such as the printed circuit
board) electronic components may be damaged.
board.
you need to lay the drive down.
If you substitute an ATAPI adapter card or longer cables, or if you chain the
tape drive to an existing ATAPI adapter or peripheral, the compatibility
and/or operation of the tape subsystem may be seriously affected.
Chapter 3 Installation
Setting jumpers
Review the jumper settings to ensure that the jumpers are properly configured for
your system. Figure 3-1 shows the location of the jumper block. Figure 3-2 shows
the jumper block.
Note:
Record your jumper settings prior to installation. They are not visible after
the drive has been installed.
The default setting is Slave mode with a jumper over pin 3 and pin 4.
Your system setting may vary, so be sure to check your computer or ATAPI
controller manual to determine the proper configuration choice for your system.
Figure 3-1
Location of jumper block and connectors
NOTE:
Bottom of drive shown.
JUMPER
BLOCK
PIN 1
IDE
CONNECTOR
POWER
CONNECTOR
IDE PIN 1
Figure 3-2
Jumper block and jumper settings
(TOP OF TAPE DRIVE)
1
CABLE SELECT
6432
SLAVE
75
8
NOT USED
MASTER
JUMPER ON
JUMPER OFF
Page 16 STT20000A Product Manual
Installation Chapter 3
Installing the drive
The internal drive can be installed in a one-half-inch high by 3.5-inch form factor
drive bay or in an inch-high by 5.25-inch form factor (with mounting brackets). The
drive can be installed in three different orientations: horizontally (LED to the left) and
vertically (on either side).
The following section provides directions for mounting the drive in either a 3.5-inch
enclosure or in a 5.25-inch enclosure.
1. Before you install the drive, write down the serial number and model number
shown on the drive and put this information in a safe place. You need this
information if you ever call for service.
2. With the computer cover removed, remove the face plate from the drive bay in
which you plan to install the drive. Refer to the manual that you received with
your computer for instructions about removing the face plate if necessary.
Note:
3. Attach any special mounting hardware to the drive that your system might
4. Locate the mounting screw holes in the drive brackets. Each side contains two
5. Slide the tape drive into the computer so that the drive bezel and the computer
If devices are installed in any drive bays adjacent to the one you are using
for the internal drive, partially removing those devices might give you more
working space.
require. Refer to the manual that you received with your computer for
requirements.
sets of holes. Use the set that aligns the drive properly within the drive bay.
face plate are flush. Then, align the mounting holes as shown in Figure 3-3.
Figure 3-3
Aligning the drive in the computer
STT20000A Product Manual Page 17
Chapter 3 Installation
6. Secure the drive using the mounting screws. The threaded mounting brackets
are designed for M3.0 metric screws. If you are mounting the drive in a 3.5-inch
bay, use the screw supplied with the drive. Do not substitute other screws.
Using longer screws may damage the drive. If slide rails are needed, use the
plastic slide rails (supplied with the drive in some configurations).
7. Connect an available power cable to the power connector on the drive. Figure
3-1 shows the location of the power connector. The recommended power
mating connector requires an AMP 1-48024-0 housing with AMP 60617-1 pins
or equivalent.
Note:
8. Connect the interface cable with the connector on the rear of the unit. When
you make the connection, be sure pin 1 of the connector aligns with pin 1 on
the cable connector. See Figure 3-1 for the location of the connector and the
Pin 1 location.
Note:
9. Replace the computer cover. Be sure to reconnect any peripherals that you
disconnected during the installation.
10. Plug the computer and any peripherals into an AC power outlet.
11. Start the computer and install your tape backup software.
Mounting dimensions
Turn off all power before inserting connectors.
Pin 1 on the connector on the rear of the drive is to your right as you look at
the back of the drive (right side up). (See Figure 3-1.) Your cable should
have Pin 1 highlighted by a color or dark strip. Be sure to mate Pin 1 on the
cable to Pin 1 on the drive. Failure to do so could make the drive
inoperative. Also, the cable is keyed to prevent incorrect installation. Make
sure that the blocked pin in the cable connector coincides with the missing
pin on the connector on the rear of the drive. (See Figure 3-1.)
Figures 3-4 and 3-5, respectively, show the location of the mounting holes for the
internal drive without and with mounting brackets.
Page 18 STT20000A Product Manual
Installation Chapter 3
Figure 3-4
Mounting holes on internal drive (without mounting brackets)
3.7 in (94 mm)
2.758 in
(70 mm)
6.36 in
(161.5 mm)
1.220 in
(31 mm)
1.0 in
4.0 in (102.6 mm)
0.157 in
(25.4 mm)
(4 mm)
Figure 3-5
Mounting holes on internal drive (with mounting brackets)
0.2 in (5 mm)
0.315 in
(8 mm)
3.543 in
(90 mm)
2.382 in
(60 mm)
0.984 in
(25 mm)
5.76 in (146.4mm)
5.87 in (149.0mm)
.075 in (1.9mm)
2 PLACES
3.12 in
(79,2mm)
1.81 in
(45.9mm)
0.197 in
(5mm)
1.7 in
(43mm)
2.36 in
(60mm)
0.4 in
(10.2mm)
0.62 in
(15.7mm)
0.86 in
(21.8mm)
3.12 in
(79mm)
2.08 in
(53mm)
0.51 in
(13.0mm)
5.49 in
(139mm)
STT20000A Product Manual Page 19
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