Seagate DDS User manual

DAT Drive Installation Manual
DDS, DDS-DC, DDS-2 and DDS-3 tape drives
English (Section A)
Français (Section B)
Deutsch (Section C)
Español (Section D)

© 1998 Seagate Technology, Inc. All rights reserved
Publication Number: 10002664-006, December, 1998
Seagate, Seagate Technology, and the Seagate logo are registered
trademarks of Seagate Technology, Inc. Other product names are registered
trademarks or trademarks of their owners.
Seagate makes no Warranty of any kind with regard to this document. Seagate
shall not be liable for any errors contained herein, or indirect, special, incidental
or consequential damages in connection with the furnishing, performance, or
use of this document.
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 Technology, Inc.

Seagate DAT Drive Installation Manual—English A-1
Section A
English

A-2 Seagate DAT Drive Installation Manual—English

Seagate DAT Drive Installation Manual—English A-3
Contents
Contents 3
FCC notice 4
Introduction 5
Before you begin 6
SCSI cables and connectors 6
Installing an internal DAT drive 7
Configuring an internal DAT drive 7
Mounting an internal DAT drive 13
Connecting power and interface cables 15
Installing an external DAT drive 16
Configuring an external DAT drive 16
Connecting the SCSI interface cable 17
Connecting the power cord 18
Operating and maintaining a DAT drive 19
Loading a cartridge 19
Unloading a cartridge 20
Initializing a blank DAT cartridge 21
DAT cartridge compatibility 21
Write-protecting a DAT cartridge 22
Cleaning the tape heads 22
LED codes 23
UNIX Configuration Notes 27
Drive Requirements 27
Drive Configuration Switches. 27
Inquiry Strings 28
Configuring for the DEC UNIX Environment 29
Configuring for the Sun Environment 31
Configuring for the SGI Environment 32
Configuring for the HP-UX Workstation Environment 35
Configuring for the IBM AIX Environment 36
Configuring for the SCO Environment 37
Technical support 39

A-4 Seagate DAT Drive Installation Manual—English
FCC notice
This equipment generates and uses radio frequency energy and, if not
installed and used in strict accordance with the manufacturer's instructions,
may cause interference to radio and television reception, which could void
the user's authority to operate the equipment. It has been tested and found
to comply with the limits for a Class B digital device pursuant to 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
interference does occur, try to correct it by taking one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the computer and the receiver.
• Connect the computer into an outlet on a circuit different from that to
which the receiver is connected.
• Consult your dealer or an experienced radio/television technician for help.
You may find the following booklet prepared by the Federal Communications
Commission helpful: How to Identify 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. Further, this
equipment complies with the limits for 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.

Seagate DAT Drive Installation Manual—English A-5
Introduction
This manual contains information on how to install and
operate Seagate®digital audio tape (DAT) drives. This
manual covers DAT drives that support the DDS (digital data
storage), DDS-DC, DDS-2 and DDS-3 tape formats.
The following table identifies the Seagate DAT drive models
covered by this manual and the tape formats that they
support.
Format DDS DDS-DC DDS-2 DDS-3
Capacity 2 Gbytes 4* Gbytes 8* Gbytes 24* Gbytes
3.5-inch
internal
models
4320NT
CTD2004H-S
STD12000N
4324NP
CTD4004H-S
STD14000N
4326NP
CTD8000H-S
STD18000N
STD124000N
5.25-inch
internal
models
4320RT
CTD2004R-S
STD22000N
4324RP
CTD4004R-S
STD24000N
4326RP
CTD8000R-S
STD28000N
STD224000N
External
models 4350XT
CTD2004E-S
STD62000N
4324XP
CTD4004E-S
STD64000N
4326XP
CTD8000E-S
STD68000N
STD624000N
* Typical capacity, assuming 2:1 data compression. Native capacity is
one half these values.
➤ Note: The dip-switch and jumper configurations in this
manual apply
only
to those drives whose model numbers
begin with the letters “STD.” For older drives, see the
Seagate web site (www.seagate.com) or contact Seagate
technical support, as described at the back of this
manual.

A-6 Seagate DAT Drive Installation Manual—English
Before you begin
!Caution. If you are installing an internal drive,
observe the following precautions to avoid damaging
the drive through electrostatic discharge.
• Do not remove the drive from the antistatic bag until you
are ready to install it.
• Before you remove the drive from the antistatic bag,
touch a grounded metal surface to discharge any static
electricity buildup from your body.
• Hold the drive only by its edges and avoid direct contact
with any electronic components.
• If you need to put down the drive, lay it on top of the
antistatic bag or place it inside the bag.
SCSI cables and connectors
These Seagate DAT drives can be connected to a standard,
single-ended SCSI or SCSI-2 interface. A 50-conductor flat
cable or a 25-signal twisted-pair cable may be used to
connect the drive to a SCSI host adapter. The cable should
not be longer than 6 meters (19.5 feet).
The internal DAT drive provides a 50-pin, dual-row single-
ended SCSI connector at the back of the drive.
The external DAT drive provides two 50-pin, shielded
connectors (ANSI Alternative 2) on the rear panel of the
drive. These connectors consist of two rows of ribbon
contacts spaced 2.16 mm (0.085 in) apart. Either connector
can be used as a SCSI IN or SCSI OUT connection.

Seagate DAT Drive Installation Manual—English A-7
Installing an internal DAT drive
Internal drive installation involves three main steps:
1. Configuring the drive
2. Mounting the drive
3. Connecting power and interface cables
➤ Note: Internal Seagate DAT drives come in two mounting
configurations. Drives configured for 5.25-inch bays are
identical to those designed for 3.5-inch bays except that
drive mounting brackets have been added on each side
of the drive. Installation procedures are the same for both
drive configurations.
Configuring an internal DAT drive
Before you install the tape drive in your computer, you may
need to set the drive’s SCSI ID or other drive features. Most
features are set using a bank of dip-switches on the
underside of the drive (see Figure 1 below). To control SCSI
termination and terminator power or to configure the drive for
remote SCSI address selection, use the jumpers on the back
of the drive (above the interface and power connectors).
➤ Note: The dip-switch and jumper configurations shown
here apply
only
to Seagate drives whose model numbers
begin with the letters “STD.” For older DAT drives, see
the Seagate web site (www.seagate.com) or contact
Seagate technical support, as described on page A-39.
Figure 1
Dip switches and jumpers for internal DAT drives
Note:
Drive is shown upside down
Dip switches
SCSI jumper block

A-8 Seagate DAT Drive Installation Manual—English
Dip-switch settings
The default dip switch settings for Scorpion 4, 8, and 24 DAT
drives are listed below:
• SCSI ID 0
• The drive reads or writes both MRS and non-MRS
4-mm media.
• Parity checking is disabled.
• Data compression is enabled.
• Power-on self-test diagnostics are disabled.
The drive is shipped with SCSI termination disabled. If the
default settings are appropriate for your computer system
and
you do not need to enable SCSI termination for this
drive, skip ahead to “Mounting an internal DAT drive” on page
A-13.
Changing dip-switch settings
Figure 2 on the following page shows the location of dip
switches on the underside of a Seagate internal DAT drive.
Factory-default settings for each switch are also shown in
Figure 2. Each of these settings is described in detail on the
following pages.
➤ Note: Not all drives come with dip switches 9 and 10.
These switches are used to configure the drive for use
with UNIX operating systems, as described on page A-27
of this manual.

Seagate DAT Drive Installation Manual—English A-9
Figure 2
Dip-switch settings for internal DAT drives
1 2 3 4 5 6 7 8 9
10
O
F F
Block of 10 dip switches
S2 S3 S4 S5 S6 S7* S8
OFF
ON
OFF
SCSI ID
0
1
2
3
4
5
6
7
S9 S10
Note:
Drive is shown upside down
Default dip-switch settings:
Inquiry
String
Data
compression Self-test
Parity
MRS
Mode
Enable
Disable
Disable
Enable
Enable
Disable
All
MRS
only
SCSI ID Selection
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
S1
ON
UNIX
Configuration
Seagate
Archive
see text
Key to dip-switch settings:
*Some drives may be factory-configured to
use the Archive inquiry string.
If you change a dip switch, the new setting will not take effect
until you restart the drive or send a SCSI Bus Reset to the
drive.
SCSI ID switches (switches 1 through 3)
Switches 1, 2, and 3 correspond to the SCSI device address
identification bits 0 (LSB), 1, and 2 (MSB), respectively. The
default setting is SCSI ID 0 (all three switches OFF).
➤ Note:
Each SCSI device on a bus must have a unique
SCSI ID. The SCSI host controller generally uses
ID 7. In some systems, the boot drive uses ID 0.
Media-recognition system (switch 4)
The media-recognition system allows the drive to determine
whether a given DAT tape supports the DDS standard. Use
of non-DDS media may appear to give satisfactory results,
but the inferior specifications of such media can cause data-
integrity problems.

A-10 Seagate DAT Drive Installation Manual—English
Switch 4 enables or disables media-recognition system
(MRS) mode. If switch 4 is ON (the default setting), the drive
reads or writes both MRS and non-MRS 4-mm media. If
switch 4 is OFF, the drive reads and writes to MRS media
and reads from but does not write to 4-mm media.
Parity check enable/disable (switch 5)
Switch 5 enables or disables parity checking for the SCSI
bus. If switch 5 is ON, parity checking is enabled. If switch 5
is OFF (the default setting) parity checking is disabled, but
parity is still generated by the drive.
DDS pass-through mode enable/disable (switch 6)
If switch 6 is OFF (the default setting), DDS pass-through
data compression is enabled. If switch 6 is ON, data
compression is disabled.
➤ Note: The setting of switch 6 can be overridden if the
host computer issues the appropriate SCSI Mode Select
command.
Inquiry string (switch 7)
If switch 7 is ON, the drive generates a SCSI inquiry string
that identifies it as a Seagate DAT drive. However, for
compatibility with older software and operating systems, the
drives can be configured as Archive Python drives by setting
dip switch 7 to OFF.
Power-on self-test enable/disable (switch 8)
Switch 8 enables or disables execution of power-on self-test
diagnostics when the drive is powered on. If switch 8 is OFF
(the default setting), the drive does not perform a power-on
self test. If switch 8 is ON, the drive responds to SCSI
commands only after successful completion of the self-test
(about 5 seconds).
Switches 9 and 10
Not all drives come with dip switches 9 and 10. These
switches are used to configure the drive for use with UNIX
operating systems, as described on page A-27.

Seagate DAT Drive Installation Manual—English A-11
Jumper settings
Configuration jumpers on the back of the drive are used to
control SCSI bus termination and terminator power. The
jumpers can also be used for remote SCSI address selection.
Figure 3 shows the locations of the jumper block and jumper
settings for the internal DAT drive.
Figure 3
Location of jumper blocks on internal DAT drives
10
9 7
6
5
4
3
2
1
12
11
14
13
16
15
8
Remote SCSI ID
SCSI Termination
(Jumper on pins 11-12
enables active termination)
Termination Power
(Jumper on pins 15-16
enables termination power)
Jumper ON Jumper OFF
Pins
5-6
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Pins
3-4
OFF
OFF
ON
ON
OFF
OFF
ON
ON
Pins
1-2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SCSI
ID
0
1
2
3
4
5
6
7
Jumper Block
Settings for each jumper described in detail in the following
pages. The default settings are:
• Terminator power is disabled.
• Active termination is disabled.

A-12 Seagate DAT Drive Installation Manual—English
Enabling SCSI termination
Active SCSI termination is
disabled
as the factory default. If
the drive is the only device on the SCSI bus or if it is the last
device on the bus, you need to enable active termination by
placing a jumper across pins 11 and 12.
Terminator power
You can enable terminator power if needed for terminators or
other SCSI devices through a jumper placement. The factory
default for internal drives is that terminator power is disabled.
To enable terminator power, place a jumper firmly over pins
15 and 16, as shown in Figure 3.
!Caution. If the jumper is installed, be careful not to
short the TERMPWR signal to ground.
The drive contains a terminator power fuse to prevent
damage to drive components in case the terminator power is
shorted. If terminator power is enabled and the SCSI cable is
connected upside down for example, this fuse may blow to
prevent damage to the drive. If this occurs, the drive will not
longer supply terminator power to the bus. To replace the
fuse, you must return the drive to an authorized repair facility.
Remote SCSI Address Selection
You can use pins 1 through 6 to select the SCSI address
remotely. To do so, connect a remote SCSI ID switch to pins
1 through 6. Pins 1 and 2 configure SCSI ID bit 0; pins 3 and
4 configure bit 1; and pins 5 and 6 configure bit 2.
➤ Note: If you use remote SCSI ID selection, set switches
S1 through S3 to the OFF position (see Figure 2 on page
A-9).

Seagate DAT Drive Installation Manual—English A-13
Mounting an internal DAT drive
You can install your Seagate internal DAT drive horizontally
or vertically (on its side).
Mounting the drive in a 3.5-inch drive bay
To mount the drive in a 3.5-inch drive bay, mount the drive
using two M3.0 metric screws on each side of the drive. Do
not use screws longer than 4 mm or you may damage the
drive. As shown in Figure 4, the 3.5-inch drive has four screw
holes on the bottom and five on each side.
Figure 4
Mounting holes for internal DAT drive in 3.5-inch
configuration (no mounting brackets)
M3.0 X
4 DEEP MIN.
4 PLACES
94.0 mm
(3.70 in)
3.8 mm
(.15 in)
2 PLACES
31.0 mm
(1.22 in)
70.0 mm
(2.76 in)
8.0 mm
(.31 in)
2 PLACES
M3.0 X
4 DEEP MIN.
10 PLACES
5.0 mm
(.20 in)
2 PLACES
35.0 mm
(1.38 in)
2 PLACES
60.0 mm
(2.36 in)
2 PLACES
21.0 mm
(.83 in)
2 PLACES
30.0 mm
(1.18 in)
2 PLACES
Side View Bottom View
104.1 mm
(4.10 in)
45.0 mm
(1.77 in)
6 mm
(.24 in)
2 PLACES
152 mm
(5.98 in)
101.6 mm
(4.00 in)
41.2 mm
(1.62 in)
28.3 mm
(1.11 in)
2 PLACES
41.3 mm
(1.63 in)

A-14 Seagate DAT Drive Installation Manual—English
Mounting the drive in a 5.25-inch drive bay
If you are mounting the drive in a 5.25-inch drive bay, you
must use a drive with mounting brackets. As shown in Figure
5 below, the 5.25-inch drive brackets have four screw holes
on the bottom and six on each side.
Figure 5
Mounting holes for internal DAT drive in 5.25-inch
configuration (with mounting brackets)
M3.0 X
4 DEEP MIN.
4 PLACES
139.7 mm
(5.50 in)
47.6 mm
(1.87 in)
79.4 mm
(3.13 in)
M3.0 X
4 DEEP MIN.
12 PLACES
79.4 mm
(3.13 in)
2 PLACES
47.6 mm
(1.87 in)
2 PLACES
148.5 mm
(5.84 in)
6 mm
(.24 in)
2 PLACES
180.6 mm
(7.11 in)
146 mm
(5.74 in)
41.2 mm
(1.62 in)
21.8 mm
(.86 in)
2 PLACES
31.5 mm
(1.24 in)
2 PLACES
41.3 mm
(1.63 in)
9.9 mm
(.39 in)
2 PLACES
Side View Bottom View

Seagate DAT Drive Installation Manual—English A-15
Connecting power and interface cables
Attach the power and SCSI interface cables to the
appropriate connectors on the back of the drive. Figure 6
shows the locations of these connections.
Connecting the SCSI interface cable
Turn off all power to the drive and host computer. Attach the
SCSI cable, making sure to align pin 1 on the cable with pin 1
on the drive. Pin 1 on the SCSI connector is to your right as
you look at the back of the drive (see Figure 6). Your SCSI
cable should have pin 1 highlighted by a colored stripe.
Connecting the power cable
Attach an 4-pin power connector from the system power
supply to the connector on the back of the drive. The
recommended 4-pin power connector for the internal drive is
an AMP 1-48024-0 housing with AMP 60617-1 pins or
equivalent.
Figure 6
Locations of SCSI interface and power connectors on
internal drive
4-pin
power
connector
SCSI pin 1
SCSI connector

A-16 Seagate DAT Drive Installation Manual—English
Installing an external DAT drive
The Seagate external DAT drive is a compact external unit
that connects to the host computer as a turnkey subsystem.
Installing the external drive involves three simple steps:
1. Configuring the drive
2. Connecting the SCSI interface cable
3. Connecting the power cord
Configuring an external DAT drive
The following is the default configuration for Seagate external
DAT drives:
• The drive reads or writes both MRS and non-MRS
4-mm media.
• Parity checking is disabled.
• DDS-DC data compression is enabled (applies only to
models that support data compression)
• The power-on self-test diagnostics of the drive are
disabled.
• Termination power is supplied to the SCSI bus.
➤ Note: Some of these configuration settings can be
changed using the SCSI Mode Select command. SCSI
command information for Seagate DAT drives is provided
in the product description manual.
Setting the SCSI ID
Make sure that the drive is turned off; then set the SCSI ID
for the drive using the push-button switch on the back of the
external drive. Figure 7 the following page shows this switch,
as well as the two SCSI interface connectors, the on/off
switch, and the power-cord connector.
➤ Note: The drive must be restarted, or a SCSI bus reset
must be issued for any change in SCSI ID to take effect.

Seagate DAT Drive Installation Manual—English A-17
Figure 7
Rear panel of external DAT drives
6
Power
Connector
ON/OFF
Switch
Push-button
Switch
SCSI
Connectors
Connecting the SCSI interface cable
Seagate’s external DAT drives have two SCSI connectors to
allow daisy chaining, as shown in Figure 7. You can use
either connector to attach the drive to the host computer or to
another SCSI device.
➤ Note: Turn off all power before connecting or
disconnecting SCSI cables or terminating plugs.
If the DAT drive is the last device or the only device in a
SCSI chain, you must install a terminating plug on the unused
SCSI connector. See Figure 8 on the following page for two
SCSI termination examples. You can purchase a terminating
plug from Seagate Express (Seagate part number
EXSATERM).

A-18 Seagate DAT Drive Installation Manual—English
Figure 8
SCSI termination examples
Example 1: SCSI termination
in a system that has only
external SCSI devices.
Example 2: SCSI termination
in a system that has both
internal and external SCSI devices.
Internal SCSI device
Internal SCSI device
(termination enabled)
External SCSI device
(termination enabled)
External SCSI device
SCSI Controller
External SCSI device
External SCSI device
(termination enabled)
SCSI Controller
(termination enabled)
Connecting the power cord
Attach the power cord securely to the power connector on the
back of the drive. The location of the power connector is
shown in Figure 7 (on the previous page).