Seagate STD224000N - DAT Scorpion 24 Tape Drive User manual

Seagate DAT Drive Installation Manual
English

Seagate DAT Drive Installation Manual

Seagate DAT Drive Installation Manual
Contents
FCC notice
Introduction 1
Before you begin 1
SCSI cables and connectors 2
Installing an internal DAT drive 3
Configuring an internal DAT drive 3
Mounting an internal DAT drive 10
Connecting power and interface cables 10
Installing an external DAT drive 11
Configuring an external DAT drive 11
Connecting the SCSI interface cable 12
Connecting the power cord 13
Operating and maintaining a DAT drive 14
LED codes 14
Loading a cartridge 17
Unloading a cartridge 18
Initializing a blank DAT cartridge 18
DAT cartridge compatibility 19
Write-protecting a DAT cartridge 20
Cleaning the tape heads 20
Technical support 22

Seagate DAT Drive Installation Manual
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 the 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 Publication 10002664-005, July 1997

Seagate DAT Drive Installation Manual
1
Introduction
This installation 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 (digital data storage
data compression), 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.
Before you begin
!Caution. To avoid data loss, you must clean the
drive heads using a DDS head-cleaning cartridge
after every 25 hours of read/write operation and
whenever the green, cartridge-status LED flashes
during operation.

Seagate DAT Drive Installation Manual
2
!Caution. Observe the following precautions to
avoid electrostatic damage to your internal tape
drive.
• 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 DAT drives support connection 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 its SCSI host adapter. The cable
should not be longer than 6 meters (19.5 feet).
The internal DAT drive provides a 50-pin, right-angle,
dual-row single-ended SCSI connector attached to the
main PCB 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.
➤ Note: If the DAT drive is the last device in the chain
(or the only device), an external terminator must be
plugged into the unused SCSI connector. To order
terminators through Seagate Express, ask for Seagate
part number 38-9-74000000.

Seagate DAT Drive Installation Manual
3
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
Internal DAT drives come in two configurations, for
mounting in 3.5-inch or 5.25-inch drive bays, respectively.
Except for mounting the drive, installation procedures are
the same for both types of drives.
Configuring an internal DAT drive
Before you install the tape drive in your computer, you
may need to configure 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. 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 (beneath the interface and power
connectors).
Dip-switch settings
Figures 1 and 2 on page 4 show the location of dip
switches on the underside of 3.5-inch and 5.25-inch
internal drives, respectively. You can access the
switchbank through a rectangular cutout in the drive
shell.
➤ Note. DDS-3 drives have two additional reserved dip
switches on each switchbank. These reserved switches
are not shown in Figures 1 and 2.

Seagate DAT Drive Installation Manual
4
Figure 1
Location of switchbank—3.5-Inch DAT drive
(drive is upside down)
1 2 3 4 5 6 7 8
O
F F
Power
Connector
Pin 1
Jumper
Block SCSI
Connector
Figure 2
Location of switchbank—5.25-Inch DAT drive
(drive is upside down)
1 2 3 4 5 6 7 8
O
F F
Power
Connector
Pin 1
Jumper
Block
SCSI
Connector

Seagate DAT Drive Installation Manual
5
Factory-default settings for each switch are shown in
Figure 3 (only DDS-3 drives have switches S9 and S10).
These settings are described in detail on the following
pages.
Figure 3
Default dip-switch settings
S1
Inquiry
String
S2S3S4S5S6
S7
S8
OFF
DDS Pass-
through
Self-test
ON
OFF
ON
Parity MRS
Mode
Disable
Enable
Archive
Seagate
DDS-DC
DDS
Disable
Enable
MRS
All
SCSI ID Selection SCSI ID
0
1
2
3
4
5
6
7
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
S9
S10
Reserved
(do not use)
➤ Note.
The drive must be turned OFF then ON or a
SCSI Bus Reset must be received for switch settings to
take effect.
The default dip switch settings for this drive are listed
below:
• SCSI ID 0
• 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).
• Seagate inquiry string is enabled.
• Power-on self-test diagnostics are disabled.
If these default settings are appropriate for your computer
system and you do not need to enable SCSI termination
for this drive, then turn to “Mounting an internal DAT
drive” on page 10.

Seagate DAT Drive Installation Manual
6
SCSI ID switches (switches S1 through S3)
The three switches S1 through S3 correspond to the SCSI
device address identification bits 0 (LSB) through 2
(MSB), respectively.
➤ 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 S4)
The media-recognition system allows the drive to detect
DDS cartridges that support this feature. Use of non-DDS
media may appear to give satisfactory results, but the
inferior specifications of such media can cause data-
integrity problems.
The S4 switch enables or disables media-recognition
system (MRS) mode. If S4 is ON, the drive reads or writes
both MRS and non-MRS 4-mm media. If S4 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 S5)
The S5 switch enables or disables parity checking for the
SCSI bus. When parity checking is disabled, parity is still
generated by the drive.
If switch S5 is on, parity checking is enabled. The default
setting is parity checking disabled (S5 set to off).
DDS pass-through mode enable/disable (switch S6)
If switch S6 is on, DDS pass-through is enabled (data
compression is disabled).
➤ Note. The function of the S6 switch can be overridden
by the proper SCSI MODE SELECT command issued
from the host computer.
Inquiry string (switch S7)
The S7 switch is used to set the inquiry string used by the
drive. It should be left in its factory-default setting (ON).

Seagate DAT Drive Installation Manual
7
Power-on self-test enable/disable (switch S8)
The S8 switch enables or disables execution of power-on
self-test diagnostics when the drive is powered on. If S8 is
ON, the drive responds to SCSI commands only after
successful completion of the self-test (about 5 seconds).
Switches 9 and 10
These switches are only present on DDS-3 drives. They
are reserved and should not be used.
Jumper settings
The configuration jumpers are used to control SCSI bus
termination and terminator power. The jumpers can also
be used for remote SCSI address selection. Figures 4 and 5
show the locations of the jumper blocks for the 3.5-inch
and 5.25-inch internal DAT drives, respectively.
Figure 4
Location of jumper blocks on 3.5-Inch internal
drives
Power
Connector
Pin 1
Jumper
Block
SCSI
Connector

Seagate DAT Drive Installation Manual
8
Figure 5
Location of jumpers for 5.25-inch drives
Power
Connector
Pin 1
Jumper
Block
SCSI
Connector
Settings for each jumper are shown in Figure 6 below.
These settings are described in detail on the following
page. The default settings are:
• Terminator power is disabled.
• Active termination is disabled.
Figure 6
Jumper configurations for internal DAT drives
10
9 7
6
5
4
3
2
1
12
11
14
13
16
15
8
SCSI ID
ActiveTerminator
Enabled
(Jumper on pins 11-12)
Termination Power ON
(Jumper on pins 15-16)
Jumper ON Jumper OFF
Pins
5-6 Pins 3-4 Pins 1-2 SCSI
ID
OFF OFF 0OFF
OFF OFF 1ON
OFF ON 2OFF
OFF ON 3ON
ON OFF 4OFF
ON OFF 5ON
ON ON 6OFF
ON ON 7ON

Seagate DAT Drive Installation Manual
9
Enabling SCSI termination
Active SCSI termination is disabled as the factory default.
If you need to enable active termination on the drive,
place a jumper on pins 11 and 12.
➤ Note. You need to enable the active termination if the
drive is the only device on the SCSI bus or if it is the
last device on the bus.
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 6.
!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 remotely select the SCSI
address. To do so, install a remote SCSI ID switch and
connect it to pins 1 through 6. Pins 1 and 2 configure bit 0;
pins 3 and 4 configure bit 1; and pins 5 and 6 configure bit 2.
➤ Note. If you use this method for ID selection, set
switches S1 through S3 to the OFF position (see
Figure 3 on page 5.)

Seagate DAT Drive Installation Manual
10
Mounting an internal DAT drive
You can install your Seagate internal DAT drive
horizontally or on its side.
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. The 3.5-inch drive has four
screw holes on the bottom and five on each side. The 5.25-
inch drive has four screw holes on the bottom and six on
each side.
Connecting power and interface cables
Attach the power and SCSI interface cables to the
connectors on the back of the drive. Figure 4 on page 7
shows the locations of these connections for the 3.5-inch
drives, and Figure 5 on page 8 shows these connections for
the 5.25-inch drives.
➤ Note.
Turn off all power before inserting connectors.
Pin 1 on the SCSI connector is to your right as you
look at the back of the drive (see Figure 4 or 5). Your
SCSI cable should have pin 1 highlighted by a colored
stripe. Be sure to align pin 1 on the cable with pin 1
on the drive, or the drive may not work.
The recommended power mating connector for this drive
is an AMP 1-48024-0 housing with AMP 60617-1 pins or
equivalent.

Seagate DAT Drive Installation Manual
11
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. External drive installation involves three
main 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 configuration settings in the EEPROM
can be changed using the SCSI Mode Select command.
SCSI command information for these 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 + and – push-button switch on
the back of the external drive. Figure 7 on page 12 shows
this switch, as well as the two SCSI interface connectors,
on/off switch, and the power-cord connector.
➤ Note. The drive must be restarted, or a bus reset
must occur for any change in SCSI ID to take effect.

Seagate DAT Drive Installation Manual
12
Figure 7
Rear panel of external DAT drives
6
Power
Connector
ON/OFF
Switch
Push
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 a host computer or
to another SCSI device.
➤ Note. Turn off all power before connecting or
disconnecting cables or terminating plugs.
If the drive is the last drive or the only drive in a SCSI
chain, you must install a terminating plug on the unused
SCSI connector. See Figure 8 on the following page for an
explanation of SCSI termination. You can purchase a
terminating plug from Seagate Express (Seagate part
number 38-9-74000000).

Seagate DAT Drive Installation Manual
13
Figure 8
Diagram of SCSI chain with termination
Example 1: SCSI termination
in a system that has only
internal 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
Internal SCSI device
SCSI Controller
(termination enabled)
Internal SCSI device
(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).

Seagate DAT Drive Installation Manual
14
Operating and maintaining a DAT drive
This section describes how to use your internal or external
Seagate DAT drive. It explains the meaning of the various
lights on the front of the drive. It also describes how to use
and care for DAT cartridges.
LED codes
As shown in Figures 9 and 10, the front panel of Seagate
DAT drives contains two rectangular lights (LEDs). These
two indicators provide information about both normal and
error conditions. The yellow rectangular LED indicates
the condition of the tape drive. The green LED indicates
the condition of the tape cartridge.
➤ Note. External DAT drives also contain a round,
green power-on LED on the front panel.
Figure 9
Front panel of internal DAT drive
Drive Status
(yellow)
Eject Button
Cassette Insertion Slot
Cartridge Status
(green)

Seagate DAT Drive Installation Manual
15
Figure 10
Front panel of external DAT drive
Drive Status
(yellow)
Eject Button
Cassette Insertion Slot
Power
(green)
Cartridge
Status
(green)
Drive status LED
The Drive Status LED is yellow and indicates the
following conditions:
• If the Drive Status light is ON continuously, the
drive is reading or writing the tape (that is, SCSI or
DAT activity is present). If you push the eject button
while the Drive Status LED is ON, you may lose
data.
➤ Note. During a SCSI PREVENT MEDIA REMOVAL
command, the Drive Status LED is always ON.
• If the drive status light is flashing rapidly, a
hardware fault has occurred. If this occurs
immediately after power-on and you have enabled the
power-on self-test (through a jumper setting), the
power-on self-test may have failed and the drive will
not operate.

Seagate DAT Drive Installation Manual
16
Cartridge status LED
The green, rectangular Cartridge Status LED indicates
the following conditions:
• If the Cartridge Status LED is ON (lit) continuously, a
cartridge has been inserted and is operating normally.
• If the Cartridge Status LED is flashing slowly, the
tape cartridge currently in the drive has generated a
significant number of data retries (beyond a
predefined DDS error threshold). This signal is a
warning only and does not indicate data loss.
If you see this signal, remove the tape and clean the
tape heads using an approved DDS DAT cleaning
cartridge (such as the Seagate Model 91301). If the
LED continues flashing or flashes when ejecting the
cartridge, use a new cartridge for future writes.
➤ Note. As routine maintenance, you should clean the
drive heads after every 25 hours of operation. See
subsequent information about maintenance.
• If the Cartridge Status LED is flashing slowly in
conjunction with the yellow LED, a prerecorded audio
cartridge is inserted and is being played
automatically.
• If the Cartridge Status LED is flashing rapidly, the
drive could not write the tape correctly (maximum
rewrite count exceeded) and the write operation failed.
First, clean the drive heads using an approved DDS
DAT cleaning cartridge, such as the Seagate Model
91301. If the LED continues flashing, use a new
cartridge for future writes.