Quantum Audio STT2401A, STT3401A User Manual
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STT2401A, STT3401A
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Travan 40 tape drive
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Product Manual
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© 2002 Seagate Removable Storage Solutions LLC. All rights reserved
Part Number 100249522
Seagate and the Seagate logo are registered trademarks of Seagate Technology LLC. Other product names are
trademarks or registered trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may
be reproduced in any form without written permission from Seagate Removable Storage Solutions LLC.
Publication Number T-012, October 23, 2002
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 booklet, How to Identify and Resolve Radio-TV Interference Problems, prepared by the Federal
Communications Commission, helpful. This booklet (Stock No. 004-000-00345-4) is available from the U.S. Government
Printing Office, Washington, DC 20402.
Warning. Changes or modifications made to this equipment, which have not been expressly approved by Seagate,
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 ICES-003.
Cet appareil numérique de la classe B est conforme a la norme NMB-003 du Canda.
Important Information About This Manual
Seagate 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 reserves the right to change,
without notification, the specifications contained in this manual.
Seagate assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any
problem that may arise from the use of the information in this manual.
Table of Contents
Table of Contents
Introduction 1
Drive overview..............................................................................................................1
Key features ..........................................................................................................1
Typical system configurations......................................................................................2
Minicartridge technology overview...............................................................................3
Flash EEPROM............................................................................................................4
References...................................................................................................................4
Specifications 5
Performance specifications..........................................................................................5
Recording Specifications .............................................................................................5
Physical specifications.................................................................................................6
Power supply specifications.........................................................................................7
Current and power requirements...........................................................................7
Power connector ...................................................................................................8
Environmental requirements........................................................................................8
Reliability......................................................................................................................9
Mean-Time-Between-Failures...............................................................................9
Mean-Time-To-Repair...........................................................................................9
Tape compatibility......................................................................................................10
Regulatory compliance ..............................................................................................10
Installation 11
Before you begin........................................................................................................11
Handling guidelines.............................................................................................11
Setting jumpers..........................................................................................................11
Installing the drive......................................................................................................13
Mounting dimensions.................................................................................................14
Drive operation and maintenance 16
Introduction................................................................................................................16
Front panel LED.........................................................................................................16
Using Travan cartridges.............................................................................................17
Loading cartridges...............................................................................................17
Unloading cartridges ...........................................................................................17
Emergency cartridge removal .............................................................................18
Forcing cartridge ejection .............................................................................18
Page iv Seagate Travan 40 Product Manual
Table of Contents
Manual ejection.............................................................................................18
Setting the write-protect switch...........................................................................19
Drive maintenance.....................................................................................................20
Caring for tape cartridges....................................................................................20
Cleaning the drive read/write head......................................................................20
Troubleshooting.........................................................................................................21
Initial checks........................................................................................................21
No drive response, front panel LED does not light..............................................21
Front panel LED blinks rapidly following power-up self-test................................21
Drive does not come ready.................................................................................22
Motor starts to drive cartridge but stops immediately..........................................22
Drive will not write but will read previously written tapes.....................................22
Tape does not stream.........................................................................................22
Drive not seen during boot-up.............................................................................23
Drive not seen by OS after boot-up.....................................................................23
Tape won’t load...................................................................................................23
Back-up program “freezes” or “locks up” ............................................................23
“Bad blocks,” media errors, etc...........................................................................24
Slow backups......................................................................................................24
Tape won’t eject..................................................................................................24
“Incompatible format,” “Won’t write on this tape”................................................24
Loading revised firmware via Seagate firmware cartridge.........................................25
ATAPI interface 27
Introduction................................................................................................................27
ATA-2 Interface pin assignments ..............................................................................27
ATAPI commands......................................................................................................28
Specification compliance...........................................................................................29
ERASE (Group 0, Op. Code 19)................................................................................30
INQUIRY (Group 0, Op. Code 12).............................................................................31
LOAD/UNLOAD (Group 0, Op. Code 1B)..................................................................33
LOCATE (Group 1, Op. Code 2B).............................................................................35
LOG SELECT (Group 2, Code 4C) ...........................................................................36
LOG SENSE (Group 2, Op. Code 4D) ......................................................................37
Page 00h—Supported Log Page ........................................................................38
Page 03h—Error Counter for READ (ATAPI) .....................................................38
Page 03—Error Counter for READ definitions .............................................39
Page 2Eh—TapeAlert Diagnostic .......................................................................40
Page 31h—Tape Capacity Page.........................................................................45
Page 31h—Special Information ..........................................................................46
Seagate Travan 40 Product Manual Page v
Table of Contents
Page 31h—Special Information Definitions ..................................................46
Page 33h—Special Information in STT31401A mode ........................................47
Page 33h—Special Information Definitions ..................................................48
Page 3Eh—Report Check-Sum of FLASH-RAM (LOG SENSE only).................49
Page 3Eh—Report Check-Sum Definitions..................................................49
MODE SELECT (Group 0, Op. Code 15) ..................................................................51
CDB for MODE SELECT Command...................................................................51
MODE SENSE (Group 0, Op. Code 1A)....................................................................61
PREVENT/ALLOW MEDIA REMOVAL (Group 0, Op. Code 1E)..............................66
READ (Group 0, Op. Code 08)..................................................................................67
READ BUFFER (Group 1, Op. Code 3C)..................................................................69
READ POSITION (Group 1, Op. Code 34)................................................................71
REQUEST SENSE (Group 0, Op. Code 03) .............................................................73
Request Sense Keys...........................................................................................76
Sense Code (ASC) and ASC Qualifier Assignments ..........................................77
REWIND (Group 0, Op Code 01) ..............................................................................80
SEND DIAGNOSTIC (Group 0, Code 1D).................................................................81
SPACE (Group 0, Op. Code 11)................................................................................82
TEST UNIT READY (Group 0, Op Code 00).............................................................84
VERIFY (Group 0, Op. Code 13)...............................................................................85
WRITE (Group 0, Op. Code 0A)................................................................................86
WRITE BUFFER (Group 1, Op. Code 3B) ................................................................87
WRITE FILEMARK (Group 0, Op. Code 10) .............................................................89
ATA Command Descriptions .....................................................................................91
CHECK POWER MODE (ATA Command E5)..........................................................93
DEVICE RESET (ATA Command 08) .......................................................................94
EXECUTE DEVICE DIAGNOSTIC (ATA Command 90)...........................................95
IDENTIFY DEVICE (ATA Command EC)..................................................................97
IDENTIFY PACKET DEVICE (ATA Command A1)...................................................98
IDLE (ATA Command E3) .......................................................................................105
IDLE IMMEDIATE (ATA Command E1) ..................................................................106
NOP (ATA Command 00)........................................................................................107
PACKET (ATA Command A0).................................................................................108
SET FEATURES (ATA Command EF)....................................................................109
SLEEP (ATA Command E6)....................................................................................111
STANDBY (ATA Command E2) ..............................................................................112
STANDBY IMMEDIATE (ATA Command E0) .........................................................113
Travan 40 tape format 114
Introduction..............................................................................................................114
Page vi Seagate Travan 40 Product Manual
Table of Contents
Tape partitioning......................................................................................................114
Track positions ........................................................................................................114
Track numbering......................................................................................................115
Track format ............................................................................................................115
Frames..............................................................................................................115
Blocks................................................................................................................117
Tape reference servo pattern..................................................................................117
Write equalization....................................................................................................118
Randomization.........................................................................................................118
Theory of operations 119
Overview..................................................................................................................119
Block diagram..........................................................................................................119
Drive mechanisms...................................................................................................120
Mechanics.........................................................................................................120
Cartridge-load mechanism................................................................................120
Capstan/drive-motor assembly.........................................................................120
Chassis .............................................................................................................120
Control circuits.........................................................................................................120
Head design.............................................................................................................121
Flash EEPROM .......................................................................................................121
Sensors and switches..............................................................................................121
Drive media (Travan minicartridges) .......................................................................122
Glossary 123
Seagate Travan 40 Product Manual Page vii
Introduction Chapter 1
Introduction
1
Drive overview
The Seagate® STT3401A and STT2401A extend the Seagate family of one-inch
high Travan drives that feature high performance, high reliability, and quiet operation.
The drives transfer data at up to 120 megabytes per minute (Mbytes/min) without
compression.
With optimal system resources and compressible data structures, nominal transfer
rates of up to 240 Mbytes per minute can be obtained using software data
compression (assuming a 2:1 compression ratio). The compression ratio is
dependent on the specific system and the nature of the files being compressed.
These drives are internal devices, providing affordable storage in either 3.5-inch
(STT3401A) or half-high 5.25-inch (STT2401A) form factors, for easy installation in
today's computers.
Key features
• Automated cartridge loading: When a cartridge is inserted into the drive, it is
automatically drawn into the drive mechanism. The cartridge is fully loaded within
the drive and does not extend beyond the front of the bezel during operation.
Pressing the Eject button causes the drive to unload the cartridge until it extends
out about one inch beyond the bezel.
• Backward read-compatible with Industry Standard QIC-3220-MC Travan 5 Data
Format
• Selectable sustained data transfer rate of 2.0 Mbytes per second (compressed)
or 1.22 Mbytes per second (native), to support various host systems
• Auto-Throttle™ tape speed adjusts to sustain streaming operation with the Host
transfer rates.
• ATAPI interface
• Servo-burst-controlled high-resolution head positioning system
• Available in either 3.5-inch, 1-inch high or 5.25-inch half-height form factors
• Data integrity of less than 1 hard read error in 1017 bits, with automatic retry
algorithm
• 8-Mbyte data buffer
• High-speed, 110 inch-per-second tape rewind
• EEPROM containing non-volatile option settings and diagnostic results
Seagate Travan 40 Product Manual Page 1
Chapter 1 Introduction
With the availability of greater capacity disc drives and the growth of small networks,
the need for cost-effective, high-capacity storage has grown. The STT3401A is ideal
for standalone computers, workstations, and small networks.
Figure 1 shows the STT3401A 3.5-inch internal drive. Figure 2 shows the
STT2401A, which comes with brackets for mounting in 5.25-inch drive bays.
Figure 1
STT3401A 3.5-inch internal drive
Figure 2
STT2401A 5.25-inch internal drives
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 on each
port, one must be designated master and the other must be designated slave. Figure
3 on the following page shows sample configurations for two ATAPI systems.
Page 2 Seagate Travan 40 Product Manual
Introduction Chapter 1
Figure 3
Sample ATAPI configurations
Minicartridge technology overview
Having evolved from the original mass-storage medium—reel-to-reel, one-half-inch
tape storage—the minicartridge technology of today offers fast, efficient, highcapacity storage in a compact, easily-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 40-Gbyte (compressed) capacity
achievable with a single Travan 40 cartridge.
The streaming-tape intelligence in the Travan drive 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. 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.
Seagate Travan 40 Product Manual Page 3
Chapter 1 Introduction
Flash EEPROM
The Seagate Travan drives incorporate leading-edge technology in the flash
EEPROM, which is useful should the drive's firmware need to be upgraded. With the
permanently installed, electrically upgradeable, flash EEPROM memory, revised
firmware for the drive can be loaded using a Seagate OEM firmware cartridge or
through the 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.
References
The following standards documents describe some of the technology incorporated in
the drives referenced in this manual.
• QIC-170—Preformatted magnetic minicartridge
• QIC-157—ATAPI command set for streaming tape
• QIC-3220-MC—Serial recorded magnetic tape minicartridge (TR-5)
• Travan 640 —Serial recorded magnetic tape minicartridge (Travan 40 or 40GB)
• Tape Alert Specification 3.0
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.
Page 4 Seagate Travan 40 Product Manual
Specifications Chapter 2
Specifications
2
Performance specifications
The following table lists the performance specifications for the Seagate STT2401A
and STT3401A tape drives.
Feature Specification
Capacity
Sustained backup rate
Tape speed
Read/Write
Fast Forward/Rewind
Load time
Unload time
Recording Specifications
Recording method
Recording format
Recording code
20.0 Gbytes—Travan 40 cartridge (native)
(40.0 Gbytes, assuming 2:1 compression)
up to 120 Mbytes per minute native;
up to 240 Mbytes per minute with 2:1 compression
92 inches per second
(56 inches per second throttle-down speed)
110 inches per second
< 2 seconds (mechanical load)
<18 seconds to READY (from Beginning of Tape)
< 2 seconds (mechanical unload)
<10 seconds (plus rewind time to Beginning of Tape)
Serpentine
Travan 640
VRR
Head configuration
Recording media
Cartridge size
Data density
Tracks
Seagate Travan 40 Product Manual Page 5
Wide write/narrow read
1650-Oe 750' Travan 40 or 40 Gbytes (20 Gbytes native)
3.2 in. × 2.4 in. × 0.4 in. (81 mm × 61 mm)
192,000 bits per inch
108 data tracks, one (1) directory track
Chapter 2 Specifications
Physical specifications
The physical specifications of the STT3401A and STT2401A are listed in the
following table.
Specification Drive for 3.5-inch mount Drive for 5.25-inch mount
Height
Width
Length
Weight
1.0 in / 25.4 mm 1.625 in (max) / 41.3 mm
including bezel
4.0 in / 101.6 mm 5.875 in / 149.2 mm
including bezel
6.4 in (max) / 161.5 mm 6.5 in (max) / 165.1 mm
including bezel
1.0 lbs / 0.45 kg 1.6 lbs / 0.72 kg
Figures 4 and 5 show the general dimensions of the 3.5-inch STT3401A (without
mounting brackets) and the 5.25-inch STT2401A (with mounting brackets).
Figure 4
STT3401A (3.5-inch mount) general dimensions
Page 6 Seagate Travan 40 Product Manual
Specifications Chapter 2
Figure 5
STT2401A (5.25-inch mount) general dimensions
Power supply specifications
The following table lists the power supply requirements for the Travan 40 drives.
Power specifications are measured at the tape drive power connector and are
nominal values.
Current and power requirements
Specification Power supply requirement
+12V DC supply +5V DC supply
Voltage tolerance
Current requirements
Seek
Load/unload
Capstan startup
Standby
±10% ±5%
0.8 amps rms
0.8 amps rms
2.0 amps rms (<200 ms)
0.03 amps rms
0.8 amps rms
0.6 amps rms
1.0 amps rms
0.5 amps rms
Ripple (peak to peak)
Seagate Travan 40 Product Manual Page 7
≤200 mV max ≤200 mV max
Chapter 2 Specifications
Power use
Seek
Load/unload
Capstan startup
Standby
Power connector
The following table lists pin assignments for the power connector for the drive.
Pin Assignment
1
2
3
4
Environmental requirements
The following table lists the environmental specifications for the Seagate STT2401A
and STT3401A. All specifications apply to the drive mechanism unless otherwise
noted.
9.6 watts
9.6 watts
38 watts
0.4 watts
4.0 watts
3.0 watts
6.0 watts
2.3 watts
+12V DC
+12 return
+5 return
+5V DC
Specification Operational Non-operational
Temperature
Drive
Cartridge at baseplate
Thermal gradient
Relative humidity
Maximum wet bulb temperature
Altitude
Vibration:
Peak to peak displacement
Peak Acceleration
+41° to +104°F
(+5° to +40°C)
+41° to +134°F
(+5° to +57°C)
5°C per hour
20% to 80%
non-condensing
78.8°F (26°C) No condensation
–1,000 to +15,000 feet
(–305 to 4,572 meters)
0.005 in. max.
(5 to 54 Hz)
0.75 G rms
(54 to 500 Hz)
–40° to +149oF
(–40° to +65oC)
(18° F per hour)
5% to 95%
non-condensing
–1,000 to +50,000 feet
(–305 to 15,240 meters)
0.1 in. max.
(5 to 17 Hz)
1.5 G rms
(17 to 500 Hz)
Page 8 Seagate Travan 40 Product Manual
Specifications Chapter 2
Reliability
Shock (1/2 sine wave)
Acoustic level operational
(A-wt sum)
Shock (1/2 sine wave)
7Gs peak, 11 msec
(retries may be occur)
55 dBA maximum
(measured at operator
position, per ISO 7779)
2.5 Gs peak, 11 msec 100 Gs peak, 11 msec
50 Gs peak, 11 msec
—
The STT3401A is designed for maximum reliability and data integrity. The following
table summarizes the reliability specifications.
Feature Specification
Non-recoverable (hard) error rate < 1 in 1017 bits
Correctable (soft) error rate < 1 in 107 bits
Error recovery and control
methods
Write Equalization;
Data Randomization;
Retry on read;
Reed-Solomon Error Correction Code
Mean-Time-Between-Failures
(MTBF)
Mean-Time-To-Repair (MTTR) Less than 0.5 hour
Mean-Time-Between-Failures
The Mean-Time-Between-Failures (MTBF) is greater than 250,000 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 a qualified
service technician to diagnose a defective drive and install a replacement drive. The
MTTR for the drive is less than 0.5 hour (30 minutes).
More than 200,000 hours (20% duty rate)
Seagate Travan drives are field-replaceable. If a problem occurs with a subassembly
or component in the drive, the entire unit should be replaced. The faulty drive should
Seagate Travan 40 Product Manual Page 9
Chapter 2 Specifications
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.
Tape compatibility
The table below summarizes the types of tape cartridges that can be used with the
Seagate Travan 40 drives. All other tape formats are incompatible. The Travan 40
drives can read any NS20 or Travan 5 cartridge written per the QIC-3220-MC
standard. Travan 40 cartridges used by the drive must be preformatted in
accordance with the QIC-180 standard.
Note. If Travan tapes are magnetically erased, they cannot be reformatted and
become unusable.
Cartridge format
Travan 40
Travan NS20
Travan 5 (QIC-3220-MC)
*Note. The capacities shown above are based on 2:1 data compression.
Uncompressed values are one half as high. Capacities, backup speeds and
transfer rates will vary with file type and system configuration.
Regulatory compliance
The Seagate Travan 40 drive complies with the regulations listed in the following
table.
Agency Regulation
CSA
TUV & IEC-RHEINLAND
Capacity*
(Gbytes)
40 750 STTM40
20 740 STTM20
20 740 STTM20
Length
(feet)
C22.2, No. 950-M89
EN 60 950/IEC 950
Seagate part
number
UL
Canadian Dept. of Communications
EN55022 (CISPR-22)
with additional CE-Mark test requirements
FCC
1950
Class B
Class B
Class B, Part 15
Use these drives 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.
Page 10 Seagate Travan 40 Product Manual
Specifications Chapter 2
• 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 (+5V DC and +12V DC) based on the regulation
applied—Extra Low Voltage (SEC) for UL and CSA and Safety Extra Low
Voltage for BSI and VDE (if applicable).
Installation
This chapter explains how to install the Seagate STT3401A and STT2401A drives. It
also describes how to set the master/slave jumpers and presents details of the
drive's power and ATAPI interface connectors.
Before you begin
Handling guidelines
Because the drive's electronic components can be damaged by electrostatic
discharge, use an electrostatic grounding strap when handling the drive. 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 drive from static electricity, DO NOT remove the drive from its
3
anti-static bag until you are ready to install it.
• 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: If you touch static-sensitive parts of the drive (such as the printed circuit
board) electronic components may be damaged.
• Hold the drive by the edges only. Avoid direct contact with any printed circuit
board.
• Lay the drive only on top of its anti-static bag or return the drive to its bag when
you need to lay the drive down.
Setting jumpers
In ATAPI systems, where two devices attached to a single interface cable, one of the
drives must be configured as "master" and the other must be configured as "slave."
In some cases, the assignment of master and slave can be made using a special
cable, as long as the devices provide a "cable select" setting.
Seagate Travan 40 Product Manual Page 11
Chapter 4 Drive operation and maintenance
Before installing the Seagate Travan 40 drive make sure that the jumpers are
properly configured for your system. Figure 6 shows the location of the jumper block,
as well as master/slave jumper settings for various configurations.
Note: Record your jumper settings prior to installation. The jumpers are not visible
after the drive has been installed.
Figure 6
Jumper block settings for STT3401A and ST2401A
These jumper settings are explained in further detail below.
• Jumpers 1 and 2 are reserved for factory use. Do not install a jumper on these
pins.
• Cable Select: When the CSEL jumper is off, the device address (Master or
Slave) is determined by the setting of the "Master" jumper. When the CSEL
jumper is on, the Master jumper is ignored and the device address is defined by
the CSEL signal in the Host cable. If CSEL is tied to ground, the device address
is Device 0 (Master). If the signal is tied high (or open), the device address is
Device 1 (Slave).
• Master/Slave: When this jumper is on, drive will act as Master on the ATA port.
An ATAPI device cannot be a Master to an ATA device, only other ATAPI
devices. If there is no jumper on the Master or CSEL jumper blocks, the drive is
configured as a slave. See table below:
"CSEL"
jumper block
"Master"
jumper block
Drive's master/slave setting
Off On Device is Master (Device 0)
Off Off Device is Slave (Device 1)
On On or Off Device is Master or Slave depending
on CSEL signal level
Page 12 Seagate Travan 40 Product Manual
Drive operation and maintenance Chapter 4
Installing the drive
The STT3401A can be installed in a one-half-inch high by 3.5-inch form factor drive
bay or in a one-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 store this information in a safe place. You need this
information if you ever call for service.
2. With the computer cover removed, remove the faceplate 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 computer's faceplate.
Note: 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.
3. Attach any special mounting hardware to the drive that your system might
require. Refer to the manual that you received with your computer for
requirements.
4. Locate the mounting screw holes in the drive brackets. Each side contains two
sets of holes. Use the set that aligns the drive properly within the drive bay.
5. Slide the tape drive into the computer so that the drive bezel and the computer
faceplate are flush. Figure 7 shows the screws used to mount the STT2401A in
a 5.25-inch drive bay.
Figure 7
Mounting the STT2401A in a 5.25-inch drive bay
Seagate Travan 40 Product Manual Page 13
Chapter 4 Drive operation and maintenance
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 6
on page 12 shows the location of the power connector. The recommended
power mating connector should have an AMP 1-48024-0 housing with AMP
60617-1 pins or equivalent.
Note: Turn off all power before attaching power or interface connectors.
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 6 on page 12 for the location of the connector and
the Pin 1 location.
Note: 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 5.) 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 6.)
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
Figures 8 and 9, respectively, show the location of the mounting holes for the
STT3401A and STT2401A.
Page 14 Seagate Travan 40 Product Manual
Drive operation and maintenance Chapter 4
Figure 8
Mounting holes on STT3401A (without mounting brackets)
Figure 9
Mounting holes on STT2401A (with mounting bracket
Seagate Travan 40 Product Manual Page 15
Chapter 4 Drive operation and maintenance
Drive operation and maintenance
4
Introduction
This chapter describes important operational procedures for the STT3401A and
STT2401A. It covers the following topics:
• The front panel LED (Drive Activity Light/Eject Button)
• Using Travan 40 cartridges
• Drive maintenance and troubleshooting instructions.
• Loading revised firmware (updating flash EEPROM)
Front panel LED
As shown in Figure 10, the front panel of the Travan 40 drive contains the cartridge
opening and one light-emitting diode (LED), which doubles as an eject button.
The LED on the front of the drive may blink to indicate various drive conditions. The
basic blink patterns are shown below. See page 21 for a listing of diagnostic blink
patterns that may occur during drive startup.
LED blink pattern Drive status
On continuously Drive is ready; cartridge is loaded and initialized
Slow blinking Drive is active OR
a cartridge is being initialized
Fast blinking A drive fault has occurred OR
drive firmware is being downloaded or updated
Figure 10
Front Panel LED on the STT3401A (STT2401A is similar)
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Drive operation and maintenance Chapter 4
Using Travan cartridges
The minicartridges recommended for use with the Travan 40 drive are listed in
Chapter 2. This section describes some operations using the cartridges.
Loading cartridges
Your tape drive has a flip-up door that covers the cartridge opening when a tape
cartridge is not installed in the drive. The cartridge must be inserted into the drive
with the metal base plate down and the write-protect switch on the left. Inserting a
cartridge activates the drive's motorized “soft-load” mechanism, which draws the
cartridge all the way into the drive. Figure 11 shows the proper orientation of a
cartridge during loading.
Figure 11
Loading a Travan cartridge
Unloading cartridges
To unload a cartridge, wait until the drive activity LED is OFF and then press the
Drive-activity Light/Eject button. The drive automatically unloads and ejects a
cartridge when the Eject button is pressed or when the drive receives an Unload
command from the Host. The cartridge is unloaded until it extends about 22 mm
beyond the bezel. At this point, you can pull the cartridge straight out, as shown in
Figure 12.
Alternatively, use the eject command from the backup software to eject the tape if
the drive LED does not turn off after the backup. Refer to your software
documentation to find the eject command for your particular software.
Note. The drive may retain the cartridge for up to 2 minutes after the Eject button
is pressed in order to complete the current operation, rewind, and update the
cartridge directory track.
Caution: Under normal circumstances, you should never attempt to remove the
cartridge manually or while the drive is active.
Seagate Travan 40 Product Manual Page 17
Chapter 4 Drive operation and maintenance
Figure 12
Unloading a Tape cartridge
After removing the cartridge from the drive, place the cartridge in its protective case
and store it in a cool, dry location.
Emergency cartridge removal
Forcing cartridge ejection
If the drive will not eject a cartridge during normal operation, but you still have power
to the drive, try the following steps to force the drive to eject the cartridge:
1. Remove power from the drive.
2. Press and hold the eject button.
3. Power up the drive, while holding down the Eject button. The cartridge will be
ejected (unloaded).
As soon as the cartridge is unloaded, grasp the cartridge and pull it from the drive.
Manual ejection
If the power fails with a cartridge in the drive, and the procedure above does not
work, you may be able to remove the cartridge manually. However, there is a risk of
damaging the drive or the cartridge.
Note. Do not attempt to remove the cartridge while the drive is powered-on and
tape is in motion. This may result in an incomplete tape operation.
Take a small straight screwdriver and insert it into the notch in the lower left side of
the bezel below the cartridge. Make sure that the screwdriver is inserted straight into
the drive. The screwdriver will hit a stop. Push on the stop with a firm force. As the
stop is gradually pushed into the drive, the cartridge will come out of the drive.
Continue to push with the screwdriver until the edges of the cartridge can be
grasped. Then grasp the cartridge and pull it firmly from the drive.
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Drive operation and maintenance Chapter 4
Caution. After using the emergency ejection procedure to remove a cartridge, you
must restart the drive before inserting a new cartridge. Power must be
reapplied to the drive before it will move the loading mechanism into
position for inserting a new cartridge.
Setting the write-protect switch
Travan minicartridges feature a sliding write protect tab located in the upper left
corner of the cartridge. You can set the tab to keep data from being written on the
tape. Use this switch when you want to make sure that important data on the tape
will not be overwritten.
Figure 13 shows the cartridge with the switch in the non-protected (read/write) or
unlocked position.
Figure 13
Travan cartridge write-protect switch—unlocked position
Figure 14 shows the tab in the protected (read only) or locked position.
Figure 14
Travan cartridge write-protect switch—locked position
To return a cartridge to the "writeable" state, push the switch toward the end of the
cartridge or to the unlocked position.
Seagate Travan 40 Product Manual Page 19
Chapter 4 Drive operation and maintenance
Drive maintenance
Minimal maintenance is needed to ensure that your Travan 40 drive operates at peak
condition. This section explains how to care for tape cartridges, how to clean the
drive head, and what to do if you experience problems with the drive.
Caring for tape cartridges
Although Travan tape cartridges are ruggedly built, they must be handled with care to
preserve the data they contain. The following points are guidelines for storing and
using minicartridges.
• Do not open the tape access door of the cartridge or touch the tape itself. One
fingerprint can prevent the drive from reading the tape.
• Keep the cartridge away from sources of electromagnetic fields, such as
telephones, dictation equipment, mechanical or printing calculators, motors, and
bulk erasers. Do not lay cartridges on the computer monitor or on the base unit
of the computer.
• Keep the cartridge away from direct sunlight and heat sources, such as radiators
or warm air ducts.
• Keep the cartridge free of moisture. Do not wet or submerge a cartridge in any
liquid.
• Do not expose the cartridge to temperature extremes. Allow the cartridge to
assume room temperature slowly.
• Retensioning the tape cartridge is always recommended for optimal
performance, particularly after exposure of the cartridge to temperature changes
or shock. Retensioning restores the proper tape tension to the media.
Cleaning the drive read/write head
Caution. Never clean the read/write head of the drive with anything other than a
Seagate-approved dry-process cleaning cartridge.
To properly maintain the tape drive, you should periodically clean the read/write
head. No other periodic maintenance is required.
Follow these guidelines to help ensure that your drive provides long, reliable service:
• Operate the drive in a clean, dust-free environment.
• Never apply a lubricant to the drive.
• Generally Travan drives are highly reliable and require little user maintenance.
For normal operations cleaning once per month is quite adequate.
• For new cartridges, clean the head after two hours of tape movement. Thereafter
the drive can be cleaned as per normal operations.
Generally, the more severe the operating conditions (the greater the amount of dust
or moisture in the air), the more often the drive should be cleaned. Be sure to clean
Page 20 Seagate Travan 40 Product Manual
Drive operation and maintenance Chapter 4
the drive immediately if you observe an increase in the number of errors while
running your backup software, or if a TapeAlert cleaning message is displayed.
With the newer generation of Travan tape drive heads used in these drives, only the
dry-process cleaning cartridge method is recommended. This method does not
involve any flammable materials and provides a clean recording surface by wiping
away debris as the cleaning material passes across the recording head. Residents of
the U.S. can purchase Travan cleaning cartridges (model number STTMCL) directly
from Seagate on the web at: http://buytape.seagate.com.
Troubleshooting
If you experience problems after you install the drive, read through this section, and
try the remedies suggested here. If problems persist, contact your tape drive supplier
or Seagate technical support, as described below:
US and Canada 1-800-SEAGATE (1-800-732-4283)
Outside US and Canada 1-405-936-1234
Seagate web site http://www.seagate.com
Before you call technical support, be sure that you have the documentation for your
computer and for all installed peripheral devices.
Initial checks
Prior to performing detailed troubleshooting, check the drive and associated system
components for any obvious problems:
• Check that all connections are secure.
• Check the drive to be sure the jumper settings are correct.
The following paragraphs describe some possible drive problems and the
recommended procedure for addressing each problem.
No drive response, front panel LED does not light
Verify that +5V DC and/or +12V DC is applied to the drive. Insure that the power
supply connector is installed properly.
Front panel LED blinks rapidly following power-up self-test
If a drive failure is detected during the power-up self-test, the front panel LED blinks
rapidly a specific number of times, followed by a pause. This pattern is repeated until
power is removed from the drive. The number of blinks indicates the type of problem
with the drive, as shown in the table below. If you experience this problem, return the
drive to an authorized Seagate repair center.
Number of
LED blinks
Seagate Travan 40 Product Manual Page 21
Drive status
Chapter 4 Drive operation and maintenance
1 DRAM Write Miscompare
2 DRAM Write Timed Out
3 DRAM Read Timed Out
4 DMA Timed Out
5 ATAPI Interface Failed
6 SRAM Self Test Failed
7 DRAM/SRAM Self Test Failed
8 Serial ASIC Failed
9 Buffer Manager ASIC Failed
11 Stepper Motor Test Failed
12 Transport Motor Test Failed
15 Attempt to install incompatible firmware
16 Transfer timeout
17 Load operation failed
Drive does not come ready
• Insure the cartridge is properly oriented and fully inserted.
• Insure the cartridge is not broken and the tape appears in good condition.
Motor starts to drive cartridge but stops immediately
Check the cartridge for tape run-off, or excessive torque. Replace cartridge if
required.
Drive will not write but will read previously written tapes
• Make sure the cartridge is not write-protected.
• Make sure the cartridge is a Travan 40 cartridge, not a Travan 5 or older Travan
cartridge.
• Verify proper cable attachment to the host PC.
• If this does not correct the problem, contact Seagate Technical Support (see
page 21).
Tape does not stream
Host data handshake may be too slow. Check BIOS setting for ATAPI interface
mode; the interface chipset may not be capable of high speed PIO mode. Some
backup application software is capable of higher transfer rates than others. Other
Host activity could restrict backup operation transfer rate.
If a power interruption occurs during a backup or restore operation, start over when
the power is restored.
Page 22 Seagate Travan 40 Product Manual
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