Seagate STD2401LW-S Product Manual
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Seagate STD2401LW-S Product Manual

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Important information about this
document
The following document, the Scorpion 40 DDS-4 Tape Drive Product Manual, is
the complete guide for this tape drive. Because the tape drive comes installed
in your Gateway
does not apply. This information is listed below.
Installing hardware and software
Your Scorpion 40 DDS-4 Tape Drive comes installed on your Gateway
computer. Should you need to reinstall software or drivers, you can do
so using your Gateway System Restoration CD or Gateway Server
Companion CD. Disregard information about installing software and
drivers from diskettes. Use only the CDs mentioned above.
Reaching technical support
For technical support, contact Gateway and not the technical support
contacts mentioned in the manual. You can access Gateway technical
support at www.gateway.com.
Warranty information
Your Gateway warranty applies to the entire system, which includes the
Scorpion 40 DDS-4 Tape Drive. No other warranty, including the one in
the manual, is applicable.
Disregard the following information:
All references to installing a 3-5-inch internal Scorpion 40 drive or
an external Scorpion 40 drive.
All references to purchasing a SCSI termination connector. Gateway
supplies the SCSI termination connector on this system.
All references to purchasing a cleaning tape. Gateway supplies a
cleaning tape. Clean the tape heads as instructed in the manual.
All references to installing revised firmware.
All references to dip-switch 10 settings. Dip-switch 10 comes
configured in the off position. The Vendor ID for this switch is set
to "Archive Python."
TM
computer, some of the information in the product manual

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Summary of Contents for Seagate STD2401LW-S

  • Page 1 Important information about this document The following document, the Scorpion 40 DDS-4 Tape Drive Product Manual, is the complete guide for this tape drive. Because the tape drive comes installed in your Gateway computer, some of the information in the product manual does not apply.
  • Page 2 ......... . Scorpion 40 DDS-4 Tape Drive .
  • Page 4 ......... . Scorpion 40 DDS-4 Tape Drive .
  • Page 5 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. No part of this publication may be reproduced in any form without written permission from Seagate...

  • Page 6: Fcc Notice

    U.S. Government Printing Office, Washington, DC 20402. Warning. 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.

  • Page 7: About This Manual

    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.

  • Page 8: Table Of Contents

    Contents Contents Introduction Overview ........................1 DDS Format Standard Compatibility ..............1 Scorpion 40 Capacity and Transfer Rates ............2 Features........................3 Scorpion 40 drive models ....................3 Specifications Overview ........................7 Physical Specifications ....................7 Power Specifications....................9 Drive Performance Specifications................10 Environmental Requirements..................11 Reliability........................11 Mean Time Between Failures................11 Mean Time to Repair ...................12 DDS Cartridge Specifications ..................12 Regulatory Compliance....................13...
  • Page 9 How to clean the tape heads ................31 Automatic drive spin-down and write ................ 32 Operating the Drive in High temperature or humidity conditions....... 32 Data compression ..................... 33 Loading revised firmware from Seagate firmware cartridges........33 Flash memory..................... 33 Firmware download process................33 Theory of operations Overview ........................
  • Page 10 Contents Simplified compression operation ...............46 Dictionary ......................47 Simplified Decompression Operation ..............48...
  • Page 11 Scorpion 40 DDS-4 Product Manual Figures Figure 1. 3.5-Inch Internal Scorpion 40......................4 Figure 2. Internal Scorpion 40 Drive with drive rails for mounting in 5.25-inch drive bay ......... 4 Figure 3. External Scorpion 40.......................... 5 Figure 4. Internal Scorpion 40 Drive—Dimensions ................... 8 Figure 5.

  • Page 12: Introduction

    2.75 Mbytes per second, 5.5 Mbytes per second compressed. The Scorpion 40 drive combines established DAT technology, high-density recording and hardware data-compression capability along with Seagate’s proven computer- grade design to provide unmatched reliability and performance characteristics among DDS products.

  • Page 13: Scorpion 40 Capacity And Transfer Rates

    Kbytes/sec Kbytes/sec Kbytes/sec In data-compression mode, the Seagate Scorpion 40 drive typically doubles the storage capacity and transfer rate of the native uncompressed operation. Tape capacity and sustained data-transfer rate are dependent upon the characteristics of the files being compressed, along with system parameters such as the speed of the host, the operating system and the application software used.

  • Page 14: Features

    The Scorpion 40 also includes a “flying” preamplifier for greater signal-to-noise ratio. Features The Scorpion 40 DDS drive represents Seagate’s commitment to engineering reliable and durable tape drive products that implement leading-edge technology. Key features of the drive include: Platform based on state-of-the-art drive mechanism and tape handling components sealed in a dust-free enclosure.

  • Page 15: Figure 2. Internal Scorpion 40 Drive With Drive Rails For Mounting In 5.25-Inch Drive Bay

    Scorpion 40 DDS-4 Product Manual, Version A A 3.5-inch, half-height DDS-4 drive that mounts internally–model STD1401LW (see Figure 1). Figure 1. 3.5-Inch Internal Scorpion 40 A 5.25-inch, half-height DDS-4 drive that consists of a 3.5-inch drive with 5.25- inch mounting rails and bezel that mounts internally in a 5.25-inch, half-height space–model STD2401LW (see Figure 2).
  • Page 16 Introduction Figure 3. External Scorpion 40...

  • Page 17: Specifications

    Specifications Specifications Overview This chapter includes technical specifications for the internal and external SCSI drives. This information covers the following specifications and requirements: Physical specifications Power specifications Drive performance specifications Environmental requirements Reliability DDS cartridge specifications Regulatory compliance Physical Specifications The physical specifications of the Scorpion 40 internal and external models are listed in the following table: Specification...

  • Page 18: Figure 4. Internal Scorpion 40 Drive-Dimensions

    Scorpion 40 DDS-4 Product Manual, Version A 41.3 mm 101.6 mm (1.63 in) (4.00 in) 13.0 mm (0.51 in) 2 places 3.8 mm (0.15 in) 5.0 mm (0.196 in) 94.0 mm 2 places (3.70 in) M3.0 x 4 deep min. (10 places) 146.0 mm (5.75 in)

  • Page 19: Power Specifications

    Specifications Power Specifications The following table lists the power specifications for the internal Scorpion 40 drives. Specification +12 VDC supply +5 VDC supply Voltage Tolerance + or – 10% + or – 7% Operational Current 250 milliamps max 1.35 Amps max Standby Current 15 milliamps max 1.2 Amps max...

  • Page 20: Drive Performance Specifications

    Scorpion 40 DDS-4 Product Manual, Version A Drive Performance Specifications The following table lists the specifications for the Scorpion 40 drive. Specification Value Capacity 90 m MP 4.0 Gbytes 120 m MP+ 8.0 Gbytes 125 m MP++ 24.0 Gbytes 150 m MP+++ 40.0 Gbytes Flux density (DDS-4) 6,004 flux transitions per mm...

  • Page 21: Environmental Requirements

    Specifications Environmental Requirements The following table lists the environmental specifications for DDS drives. The internal drive should meet these standards if mounted either vertically (on its side) or horizontally (right side up). Specification Operational Nonoperational Temperature to +113 –40 to +149 to + 45 (–40 to + 65...

  • Page 22: Mean Time To Repair

    The MTTR for DAT products is less than 0.5 hour (30 minutes). The Seagate DDS drives are field-replaceable units. If a problem occurs with a subassembly or component in the drive, you should replace the entire unit. Return the drive to the factory in its original packaging.

  • Page 23: Regulatory Compliance

    Specifications Regulatory Compliance These DDS drives comply with the regulations listed in the following table. Agency Regulation C22.2, No. 950-M89 TUV-RHEINLAND EN 60 950 1950 Class A and Class B CE compliance 1. Required compliance for external model; verification on file for internal models. 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.

  • Page 24: Installation

    Place shipping containers on a flat, clean, stable surface; then carefully remove and verify the contents against the packing list. If parts are missing or the equipment is damaged, notify your Seagate representative. Always save the containers and packing materials for any future reshipment.

  • Page 25: Guidelines And Cautions

    Scorpion 40 DDS-4 Product Manual, Version A Note: Internal Scorpion 40 drives come in two mounting configurations for 3.5-inch and 5.25-inch drive bays, respectively. Drives configured for 5.25-inch bays are identical to those used for 3.5-inch bays, except for the addition of drive mounting brackets on each side of the drive and a different front bezel.

  • Page 26: Figure 6. Jumper Settings For Internal Scorpion 40

    Installation remote SCSI address selection. Figure 6 shows the locations of the jumper blocks for the internal Scorpion 40. Default jumper settings shown (SCSI ID 6, parity checking enabled, and termination power disabled) Pins: Function: SCSI ID bit 0 SCSI ID bit 1 SCSI ID bit 2 SCSI ID bit 3 9-10...

  • Page 27: Dip-Switch Settings

    Scorpion 40 DDS-4 Product Manual, Version A Parity checking (pins 9 and 10) If a jumper is installed on pins 9 and 10 (the default setting), parity checking is enabled. If no jumper is installed, parity checking is disabled, but parity is still generated by the drive.
  • Page 28 SCSI Inquiry command. When switch 10 is ON (the default setting), the Vendor ID will be “SEAGATE DAT.” When switch 10 is OFF the Vendor ID will be “ARCHIVE Python.” The “ARCHIVE Python” Vendor ID may be used by independent software...

  • Page 29: Mounting An Internal Scorpion 40

    Scorpion 40 DDS-4 Product Manual, Version A Mounting an internal Scorpion 40 You can install your Seagate internal DDS drive horizontally or vertically (on its side). Figure 8 shows a 3.5-inch drive being installed in a typical system using side mounting screws.

  • Page 30: Figure 10. Mounting Holes For Internal Scorpion 40 In 5.25-Inch Configuration (With Mounting Brackets)

    Installation 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 attached. As shown in Figure 10 below, the 5.25-inch drive brackets have four screw holes on the bottom and six on each side. 41.3 mm (1.63 in) 31.5 mm (1.24 in)
  • Page 31 Scorpion 40 DDS-4 Product Manual, Version A Ultra2 SCSI 68-pin high-density connector pin 34 pin 1 pin 35 pin 68 Figure 11. Interface and power connectors on internal Scorpion 40 SCSI Termination The internal Scorpion 40 does not provide SCSI termination. For this reason, it should not be the last device on a SCSI chain.

  • Page 32: Power Connector

    Installation Connecting a power cable Attach a four-pin power cable to the power connector on the back of the drive. Figure 13 shows the location of the power connector. The recommended 4-pin power connector for the internal drive is an AMP 1-48024-0 housing with AMP 60617-1 pins or equivalent.

  • Page 33: Installing An External Scorpion 40

    Scorpion 40 DDS-4 Product Manual, Version A Installing an external Scorpion 40 The external Scorpion 40 is a compact external SCSI device that connects to the host computer as a turnkey subsystem. Installing the external drive involves three simple steps: Configuring the drive Connecting the SCSI interface cable Connecting the power cord...

  • Page 34: Connecting The Scsi Interface Cable

    If the Scorpion 40 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 15 for two SCSI termination examples. You can purchase a terminator for the Scorpion 40 (part number 10006525-001) from Seagate Express at 1-800-656-8419. External SCSI device...

  • Page 35: Drive Operation And Maintenance

    Drive Operation and Maintenance Loading a cartridge Seagate DDS drives have a front-loading cartridge bay for easy operation. The drive- bay door opens automatically when a cartridge is inserted. Figure 16 shows a cartridge being inserted into a 3.5-inch internal drive. After you insert the cartridge, there will be a brief delay while the drive identifies the cartridge type and state and moves the tape to the data area.

  • Page 36: Initializing A Blank Cartridge

    Initializing a blank tape takes about 30 seconds. DDS cartridge compatibility Seagate Scorpion 40 drives are designed to use data-grade DDS cartridges, which comply with ANSI specifications listed in the “3.81 mm Helical-Scan Digital Computer Tape Cartridge for Information Interchange,” ANSI X3B5/89-156 standard. The drive supports 90-meter DDS-1 media, but not 60-meter DDS-1 media.

  • Page 37: Write-Protecting A Cartridge

    Drive operation and maintenance Write-protecting a cartridge Figure 18 shows how to write-protect or write-enable a DDS tape using the sliding write-protect tab. You can only write data to the tape when the tab is in the write- enabled (closed) position. Write protected Write enabled Figure 18.

  • Page 38: Clean Led

    25 hours (for DDS-1 or DDS-2 media) or for at least 50 hours (for DDS-3 or DDS-4 media). Use only a Seagate-approved cleaning cartridge to clean the drive. See the following page for details.

  • Page 39: Led Code Summary

    If cleaning the head does not correct a flashing LED condition, try using a new data cartridge. How to clean the tape heads To clean the tape heads on your drive, use only a Seagate-qualified DDS cleaning cartridge. Seagate offers a cleaning cartridge, Model STDMCL, available from...

  • Page 40: Automatic Drive Spin-Down And Write

    Scorpion 40 DDS-4 Product Manual, Version A Seagate Express at 1-800-656-8419. Do not use an audio DAT cleaning cartridge. The drive cannot recognize it. After you insert the cleaning cartridge, the drive detects that the cartridge is a cleaning cartridge, then loads and runs the cartridge for about 30 seconds. When cleaning is complete, the drive ejects the cartridge.

  • Page 41: Data Compression

    SCSI firmware needs to be upgraded. With the permanently installed, electrically upgradeable flash memory, revised SCSI firmware for the drive can be loaded using any one of three methods: 1) Seagate OEM firmware cartridges; 2) through the host SCSI bus; or 3) through the drive serial port.
  • Page 42 At this time, we recommend that you power cycle the drive to refresh any new parameter information and to execute the power-on self-test (POST) to ensure proper unit functionality. Firmware upgrade cartridges are available only to qualified Seagate OEM customers. Contact your Seagate sales representative for information.

  • Page 43: Theory Of Operations

    Theory of operations Theory of operations Overview The Scorpion 40 tape drive design integrates DAT technology (helical scan recording method) into a true computer-grade data-storage peripheral with industry-standard data-compression capability. These drive designs are the result of: Combining the economies of scale for key components, such as the cylinder, heads and audio LSIs, with a computer grade drive (3.5-inch) using four direct drive motors and electronic tape path control for the demanding computer storage environment.

  • Page 44: The Std1401Lw Drive Mechanism

    Scorpion 40 DDS-4 Product Manual, Version A The STD1401LW drive mechanism The Scorpion 40 uses the helical scan recording method with a four-head cylinder design. Four direct-drive motors and one brush-type motor are used in the drive. The read and write functions use LSIs. Engineering decisions—such as the modular partitioning of the electronics and use of surface mount, low power commercial and custom LSIs—allow the drives to conform to the industry-accepted 3.5-inch form- factor.

  • Page 45: Figure 20. Four-Head Cylinder Design

    Theory of operations advantage of this design is that a RAW check is performed immediately after the data is written. As mentioned earlier, the cylinder rotates rapidly (10,000 RPM) in the same direction that the tape moves. The wrap angle of the tape on the cylinder is approximately 102 degrees.

  • Page 46: Motors And Control Circuits

    Scorpion 40 DDS-4 Product Manual, Version A Write head B 3 tape tracks Write head A 20˚ head azimuth Figure 21. Alternating azimuth angles on tape tracks Motors and control circuits The Scorpion 40 drive uses four direct-drive, brushless motors—the capstan, cylinder and two reel motors.

  • Page 47: Flash Memory

    Issuing a SCSI Write Data Buffer command to download the firmware to the EEPROM Through the drive serial port Refer to Chapter 4 for information about loading new firmware using a Seagate firmware upgrade cartridge. Sensors A number of mechanical and optical sensors are integrated in the drive design. The cartridge in and cartridge loading sensors are mechanical sensors that determine the position of the loading mechanism.

  • Page 48: Media Recognition System (Mrs)

    Cartridge for Information Interchange, ANSI X3B5/89-156 standard. Seagate recommends Seagate-qualified, data-grade DDS DAT cartridges (Model M32000: 90 meters; and Model 34000: 120 meters, Model 324000: 125 meters) to ensure optimal data integrity and reliability. Seagate also recommends the use of a Seagate-qualified DDS head-cleaning cartridge (Model STDMCL).

  • Page 49: Figure 22. Dds-4 Cartridge Design Features

    25 hours of read/write operation and whenever the rectangular, green cartridge-in-place LED flashes during operation. You can order both DDS data and head-cleaning cartridges from Seagate. They are packaged in multiples of five. These small (approximately 2 inches × 3 inches × 0.4 inch) cartridges house magnetic tape that is 3.81 mm (0.150 inch) wide.

  • Page 50: Data Compression

    Data compression Data compression Introduction Data compression—general Typical data streams of text, graphics, software code or other forms of data contain repeated information of some sort, whether it is at the text level where you can readily recognize regular repetitions of a single word or at the binary level where the repetitions are in bits or bytes.

  • Page 51: Data Compression Considerations

    Additionally, the data compression method must adapt to different data types, automatically providing optimum handling for all types of data. Considering these factors, Seagate engineers concluded: The most effective data compression method must compress as much data as possible under the following conditions: The transfer rate of the host computer is not impeded.

  • Page 52: Hardware Compression

    Seagate’s data compression engine is designed to provide a complete data compression system using the DCLZ algorithm. This IC provides support circuitry as well as the core DCLZ compression machine.

  • Page 53: Dclz Algorithm

    Scorpion 40 DDS-4 Product Manual, Version A DCLZ algorithm Within the computer industry, algorithms developed by Abraham Lempel and Jacob Ziv (enhanced later by Terry Welch) are popular, versatile and powerful compression methods. These LZ algorithms are basically of two types—LZ1, a sliding window method, and LZ2/LZW, a hashed directory method.
  • Page 54 Data compression The following table illustrates this simplified operation. Input Current Build Output Code Match Byte String Entry Value — — — — — — — — — — — — — — — — (IN) — — — — —...
  • Page 55 Scorpion 40 DDS-4 Product Manual, Version A Dictionary codes, codewords 264 through 4,095: The dictionary codes refer to dictionary entries and represent multiple bytes (a string of characters) in the input data stream. These codes are built as the input stream is processed. These codes are pointers to other locations and eventually end by pointing to one of the byte values 0 through 255.
  • Page 56 Data compression The following steps describe a simplified version of the operation of the algorithm for decompressing data. From a reset dictionary point, (which contains only control codes and encoded bytes) codewords are fetched from the input stream and looked up in the dictionary.
  • Page 57 Seagate Technology, Inc. 920 Disc Drive, Scotts Valley, California 95066, USA Publication Number: 10006589-001, Version A Printed in USA...
  • Page 58 A MAN US DDS-4 USR GDE V0 10/99    8505421...

This manual is also suitable for:

Scorpion 40 dds-4Std1401lwStd2401lwStd6401lw

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