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DAT 72 and DDS-4 Tape Drives
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CD72LWH
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CD72LWE
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STD1401LW
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STD2401LW
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STD6401LW
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Product Manual
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Table of Contents
Related Manuals for Seagate STD2401LW
Summarization of Contents
Introduction to DAT 72 and DDS-4 Drives
Overview of DAT 72 and DDS-4
General introduction to DAT 72 and DDS-4 drives, their capacities, and applications.
DDS Format Standard Compatibility
Details compatibility with DDS-2, DDS-3, and DDS-4 recording formats.
Specifications for DAT 72 and DDS-4 Drives
Specifications Overview
Overview of the technical specifications covered in this chapter.
Physical Specifications
Details physical dimensions and weight for internal and external drives.
Power Specifications
Lists power requirements, voltage tolerance, current, and connector pin assignments.
Drive Performance Specifications
Details performance metrics like capacity, transfer rates, error recovery, and access times.
Environmental Requirements
Specifies operational and non-operational environmental conditions like temperature, humidity, and vibration.
Reliability Metrics
Summarizes reliability metrics like MTBF, MTTR, and error rates.
DDS Cartridge Specifications
Recommends specific DDS data and cleaning cartridges for optimal performance and reliability.
Regulatory Compliance
Lists the agencies and regulations the DAT 72 and DDS-4 drives comply with.
Installation Guide for DAT 72 and DDS-4 Drives
Unpacking and Inspection
Provides general information and steps for safely unpacking and inspecting the drive before installation.
Installing an Internal Drive
Outlines the three main steps for installing an internal drive.
Guidelines and Cautions for Installation
Provides safety guidelines and precautions for handling and installing the internal drive.
Configuring an Internal Drive
Explains how to configure the drive using jumpers and DIP switches, including default settings.
DIP Switch Settings
Details the function of each DIP switch on the internal drive for configuration.
Mounting an Internal Drive
Describes how to mount internal drives in 3.5-inch and 5.25-inch bays using mounting screws.
Mounting Drive in 5.25-Inch Bay
Details mounting procedures for drives configured for 5.25-inch bays.
Connecting Internal SCSI Interface
Explains how to connect the internal drive to a SCSI bus.
Internal SCSI Termination
Covers SCSI termination requirements for internal drives in a chain.
Connecting Internal Power Cable
Details how to connect the four-pin power cable to the internal drive.
Installing an External Drive
Outlines the three simple steps for installing the compact external SCSI drive.
Configuring the External Drive
Explains the default configuration settings for the external drive and how to set the SCSI ID.
Connecting External SCSI Interface
Explains how to connect the external drive to a SCSI bus.
External SCSI Termination
Covers SCSI termination requirements for external drives in a chain.
Connecting External Power Cord
Details how to connect the power cord to the external drive.
Drive Operation and Maintenance
Loading a Cartridge
Describes the process of inserting a tape cartridge into the drive.
Unloading a Cartridge
Explains how to safely eject a tape cartridge from the drive.
Initializing a Blank Cartridge
Details the process of preparing a new tape cartridge for use.
DDS Cartridge Compatibility
Specifies the types of DDS cartridges compatible with the drives.
Write-Protecting a Cartridge
Explains how to use the write-protect tab on a DDS cartridge.
LED Codes
Explains the meaning of different LED indicators on the drive for status and errors.
Cleaning the Tape Heads
Provides guidelines and reasons for cleaning the drive's tape heads.
How to Clean the Tape Heads
Describes the procedure for cleaning the tape heads using a cleaning cartridge.
Automatic Drive Spin-Down and Write
Explains the drive's automatic power-saving and data-buffering features.
Operating in Extreme Environments
Offers advice on operating the drive under challenging environmental conditions.
Data Compression Overview
Explains the drive's data compression capabilities and how it works.
Flash Memory for Firmware Upgrades
Details how to upgrade the drive's firmware using special cartridges.
Firmware Download Process via Tape
Provides step-by-step instructions for loading firmware upgrades using a tape.
Theory of Operations
Theory of Operations Overview
Introduces the DAT 72 and DDS-4 drive technologies and design principles.
Drive Mechanism
Describes the mechanical components and operation of the tape drive.
Motors and Control Circuits
Explains the function of the various motors and their control circuitry.
Timing Tracking Circuitry
Details the system responsible for precise head positioning and data tracking.
Signal-Processing Electronics
Covers the main microprocessor, data engine, and buffer management circuitry.
Flash Memory in Theory of Operations
Discusses the use of flash memory for firmware storage and upgrades.
Sensors
Explains the various mechanical and optical sensors used for cartridge detection and status.
Read-After-Write (RAW) Technique
Describes the RAW technique for verifying data integrity during writing.
Media Recognition System (MRS)
Details the MRS feature for identifying computer-grade media.
About the Data Cartridge
Provides information about the physical characteristics and specifications of DDS cartridges.
Data Compression
Data Compression Overview
Explains the concept of data compression and its benefits for tape drives.
Data Compression Considerations
Discusses factors affecting compression effectiveness, such as data type and integrity.
Hardware Compression (HDC)
Explains hardware data compression (HDC) and the DCLZ algorithm used.
Data Integrity in Compression
Differentiates between lossless and lossy compression and emphasizes lossless for data storage.
DCLZ Algorithm Details
Details the DCLZ algorithm, its standards approval, and its operation.
Simplified Compression Operation
Provides a simplified explanation of how data compression is performed.
Data Compression Dictionary
Describes the dictionary structure used by the compression algorithm.
Simplified Decompression Operation
Explains the simplified process of decompressing data.
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