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Seagate STT8000A Product Manual

Seagate STT8000A Product Manual

Atapi minicartridge drive
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STT8000A
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ATAPI Minicartridge Drive
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Summary of Contents for Seagate STT8000A

  • Page 1 ....... STT8000A .......
  • Page 2 © 1998 Seagate Technology, Inc. All rights reserved No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc. Publication Number 10002475-004, April 1998 Seagate, Seagate Technology, the Seagate logo and Sidewinder are trademarks or registered trademarks of Seagate Technology, Inc.

  • Page 3: Fcc Notice

    Changes or modifications made to this equipment which have not been expressly approved Caution. by Seagate Technology 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.
  • Page 4 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. Seagate Technology reserves the right to change, without notification, the specifications contained in this manual.

  • Page 5: Table Of Contents

    Handling guidelines..................15 Setting jumpers..................... 16 Installing the drive....................17 Mounting dimensions .................... 18 ATA-2 Interface pin assignments ................20 Drive operation and maintenance Introduction......................23 Front panel LED....................23 Using Travan cartridges ..................24 STT8000A Product Manual Page v...
  • Page 6 Table of Contents Loading and unloading cartridges ..............24 Setting the write–protect switch ..............25 Loading revised firmware via Seagate firmware cartridge ........26 Care and maintenance of the drive and cartridges..........27 Caring for tape cartridges ................27 Caring for the drive ..................27 Cleaning the drive read/write head............
  • Page 7 Mechanics ......................70 Cartridge load mechanism ................70 Capstan drive motor assembly................ 70 Chassis ......................70 Control circuits ...................... 71 Head design ......................71 Flash EEPROM ....................71 Sensors and switches ................... 71 Media—Travan minicartridges................72 STT8000A Product Manual Page vii...
  • Page 8 Table of Contents Glossary Acronyms and measurements Acronyms and abbreviations ................. 77 Units of measurement................... 79 Page viii STT8000A Product Manual...

  • Page 9: Introduction

    Chapter 1 Introduction Drive overview The Seagate STT8000A ATAPI minicartridge drive extends the Seagate family of one-inch high, DC2000 drives that feature high performance, high reliability, and quiet operation. The drive transfers data at up to 36 megabytes per minute (Mbytes/min) without compression.
  • Page 10 With the availability of greater capacity disk drives and the growth of small networks, the need for cost-effective, high-capacity storage has grown. The STT8000A is ideal for high-end standalone computers, workstations, and small networks. Built using long-wearing materials and custom Large Scale Integration (LSI) components, the ATAPI drive was engineered for heavy-duty computer applications.

  • Page 11: Features

    Figure 1-2 Internal STT8000A with mounting brackets Features The STT8000A embodies Seagate's commitment to engineer reliable and durable tape drive products. Key features of the drive are as follows: Two Internal form factors for installation in 5.25-inch half-high or 3.5-inch by...

  • Page 12: Typical System Configurations

    24, 1982) to the to the 8-Gbyte capacity achievable with the STT8000 minicartridge drive on a single Travan TR-4 cartridge. The streaming-tape intelligence in the STT8000A provides a continuous tape motion with an uninterrupted, precisely coordinated flow of data to and from the minicartridge.

  • Page 13: Flash Eeprom

    Software The STT8000A is a cost-effective means of backing up fixed disks. The drive is compatible with DOS version 5.0 or later, Microsoft Windows 3.1 or later,...

  • Page 14: About This Manual

    Theory of operation Details the functional operation of various assemblies of the ATAPI drive. Appendix A Glossary Defines key terms. Appendix B Acronyms and Lists the acronyms and measurements used in the measurements manual. Page 6 STT8000A Product Manual...

  • Page 15: Specifications

    6.36 in/161.5 mm Weight 1.0 lbs/0.5 kg 1.5 lbs/0.7 kg Figures 2-1 and 2-2 show the general dimensions of the STT8000A in 3.5-inch configuration (without mounting brackets) and in the 5.25-inch configuration (with mounting brackets). STT8000A Product Manual Page 7...
  • Page 16 Chapter 2 Specifications Figure 2-1 STT8000A (3.5-Inch mount) general dimensions 4.00 in (101.6 mm) 6.19 in (157.2 mm) 0.157 in (4 mm) 4.00 in (101.6 mm) 1.00 in (25.4 mm) Figure 2-2 STT8000A (5.25-Inch mount) general dimensions 0.86" (21.8mm) 5.49" (139.4mm) 5.76"...

  • Page 17: Power Specifications

    Specifications Chapter 2 Power specifications The following table lists the power specifications for the STT8000A. (Power specifications are measured at the tape drive power connector and are nominal values.) Specification Measurement DC Voltage +12 VDC +5 VDC Voltage Tolerance ± 10% ±...

  • Page 18: Performance Specifications

    Chapter 2 Specifications Performance specifications The following table lists the performance specifications for the STT8000A. Feature Specification Capacity 4.0 gigabytes—900Oe 740' Travan cartridge (uncompressed) 8.0 gigabytes—900Oe 740’ Travan cartridge (compressed) Effective backup rate 30 Mbytes/min typical native; 45 Mbytes/min typ. compressed...

  • Page 19: Environmental Requirements

    Specifications Chapter 2 Environmental requirements The following table lists the environmental specifications for the STT8000A. The drive may be mounted either vertically or horizontally. Specification Operational Non-operational Temperature ° o +113° F –40° to +149 (+ 5° to + 45° C) (–40°...

  • Page 20: Reliability

    MTTR for the drive is less than 0.33 hour (20 minutes). The STT8000A is a field replaceable unit. If a problem occurs with a subassembly or component in the drive, the entire unit should be replaced. The faulty drive should be returned to the factory in its original packaging.

  • Page 21: Recommended Tapes

    Specifications Chapter 2 Recommended tapes The STT8000A uses pre-formatted minicartridges. The following cartridges are recommended: Description Seagate Sony 3M/Imation Travan (740 ft) 8000TT — TR-4 (QIC-3095) 4.0 GB capacity 8.0 GB capacity with data compression Standard 900 Oe (400 ft) —...

  • Page 22: Regulatory Compliance

    CE-Mark test requirements Class B, Part 15 Use the STT8000A 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 23: Installation

    Chapter 3 Installation Introduction This chapter explains how to install the STT8000A. The following paragraphs briefly outline the organization of this chapter. The following section, Before you begin contains general information that you should read before you begin the installation.

  • Page 24: Setting Jumpers

    Bottom of drive shown. JUMPER BLOCK PIN 1 CONNECTOR IDE PIN 1 POWER CONNECTOR Figure 3-2 Jumper block and jumper settings (TOP OF TAPE DRIVE) JUMPER ON NOT USED MASTER SLAVE CABLE SELECT JUMPER OFF Page 16 STT8000A Product Manual...

  • Page 25: Installing The Drive

    Slide the tape drive into the computer so that the drive bezel and the computer face plate are flush. Then, align the mounting holes as shown in Figure 3-3. Figure 3-3 Aligning the drive in the computer STT8000A Product Manual Page 17...

  • Page 26: Mounting Dimensions

    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 3-4 and 3-5, respectively, show the location of the mounting holes for the internal drive without and with mounting brackets. Page 18 STT8000A Product Manual...
  • Page 27 5.76 in (146.4mm) 0.86 in (21.8mm) 3.12 in (79mm) 3.12 in (79,2mm) 5.49 in (139mm) 2.36 in (60mm) 2.08 in 1.81 in (53mm) (45.9mm) 0.51 in 5.87 in (149.0mm) (13.0mm) 1.7 in 0.197 in (43mm) (5mm) STT8000A Product Manual Page 19...

  • Page 28: Ata-2 Interface Pin Assignments

    Chapter 3 Installation ATA-2 Interface pin assignments The STT8000A provides a standard ATA-2 connector. The pin assignments for this connector are listed in the following table for your reference. Assignment Description Source RESET Reset Host Ground Data Bus bit 7...
  • Page 29 Device Address Bit 1 Host PDIAG Passed Diagnostics Device Device Address Bit 0 Host Device Address Bit 2 Host CS0- Chip Select 0 Host CD1- Chip Select 1 Host DASP- Device Active or Slave Device Present Ground Ground STT8000A Product Manual Page 21...
  • Page 30 Chapter 3 Installation Notes Page 22 STT8000A Product Manual...

  • Page 31: Drive Operation And Maintenance

    Drive operation and maintenance Chapter 4 Drive operation and maintenance Introduction This chapter describes important operational procedures for the STT8000A. It covers the following topics: Use of the front panel LED Using cartridges Loading revised firmware (updating flash EEPROM) Drive maintenance and troubleshooting instructions.

  • Page 32: Using Travan Cartridges

    Chapter 4 Drive operation and maintenance Using Travan cartridges The minicartridges recommended for use with the STT8000A are listed in chapter 2. This section describes some operations using the cartridges. Loading and unloading cartridges Your tape drive has a flip-up door that covers the cartridge opening when a tape cartridge is not installed in the drive.

  • Page 33: Setting The Write-Protect Switch

    Figure 4-5 shows the tab in the protected (read only) or locked position. Figure 4-5 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. STT8000A Product Manual Page 25...

  • Page 34: Loading Revised Firmware Via Seagate Firmware Cartridge

    Technology, Inc. To load a firmware upgrade tape, follow these steps. Power on the host system and the STT8000A drive. Allow the system boot up process to reach the point where there is no ATAPI bus activity. Place the firmware upgrade cartridge record switch to the non-record position.

  • Page 35: Care And Maintenance Of The Drive And Cartridges

    Chapter 4 Care and maintenance of the drive and cartridges Minimal maintenance is needed to ensure that your STT8000A minicartridge drive operates at peak condition. This section explains how to care for tape cartridges and how to clean the drive head.

  • Page 36: Cleaning The Drive Read/Write Head

    Do not touch the head with anything other than a lint-free swab. You can clean the drive head by one of two methods: you can use the Seagate- approved 3M DC2000 cleaning cartridge DC051111 (12947), P/N CKDC2000, which is available through Seagate Express 1-800-531-0968, or you can manually clean the drive head.

  • Page 37: Troubleshooting

    Check all cable connections for proper contact. Clean the tape drive head as previously instructed. Then try the operation again. If problems persist, contact your tape drive supplier or Seagate technical support at US and Canada 1-800-SEAGATE (1-800-732-4283) Outside US and Canada...
  • Page 38 Chapter 4 Drive operation and maintenance Notes Page 30 STT8000A Product Manual...

  • Page 39: Atapi Interface

    Chapter 5 ATAPI interface Introduction The STT8000A provides an ATA Packet Interface (ATAPI) controller for communications between the host computer and the drive. The drive supports the QIC-157 standard interface. Note: Refer to the QIC-157 Standard for detailed information about the this interface.

  • Page 40: Ata Registers

    Busy—set when only drive has access to ATA registers. DRDY Drive Ready—set when DSC is valid. Drive Seek Complete—set when drive ready for command. Data Request—set when data ready to be transferred. CHECK Check—set when an error has occurred. Page 32 STT8000A Product Manual...

  • Page 41: Error Register

    The value in this register must be set before every ATAPI command that transfers data (including log/mode set/sense) to determine the transfer method. This register is overwritten by the drive after every command completion to present Error STT8000A Product Manual Page 33...

  • Page 42: Supported Ata Commands

    FFh (Idle) Standby Immed. 00h (Standby) Idle Immediate FFh (Idle) Any Other Cmd FFh (Idle) Sleep (E6h) This command is treated as an Idle command and does NOT prevent the drive from responding to further commands. Page 34 STT8000A Product Manual...

  • Page 43: Set Features (Efh)

    PIO Transfer Mode 2 PIO Transfer Mode 3 PIO Transfer Mode4 Single Word DMA Mode 0 Single Word DMA Mode 1 Single Word DMA Mode 2 Multi-word DMA Mode 0 Multi-word DMA Mode 1 Multi-word DMA Mode 2 STT8000A Product Manual Page 35...

  • Page 44: Atapi Identify Device (A1H)

    0000h Unsupported 23-26 Firmware Revision (8 ASCII "N.NN" Firmware Revision characters) 27-46 Model Number (40 ASCII characters) Model Number. "Seagate STT8000A" 47,48 Disk info: mult-xfer, double word I/O 0000h Unsupported Capabilities 0F00h IORDY supported. Logical Blocks Addressing and DMA supported...

  • Page 45: Atapi Packet Command (A0H)

    Current physical and logical position is lost, and if a tape is present, a LOAD sequence is performed, resulting in a Ready at BOP0 condition (with Unit Attn). The DSC is set to 1 before the BSY bit is cleared. STT8000A Product Manual Page 37...

  • Page 46: Atapi Interface

    Also used to wait for previous command done. POSITION — WRITE Use for download only. Drive must be "unloaded". BUFFER — Resets Error Counts. SELECT — Contains Error Counts (WRITE and READ) and SENSE tape capacity. Page 38 STT8000A Product Manual...

  • Page 47: Erase Command

    This result is because all data following EOD is already logically erased. The DSC bit is reset (0) after this command is accepted and is set (1) when the command is complete. REQUEST SENSE can then be used to verify successful command completion. STT8000A Product Manual Page 39...

  • Page 48: Inquiry Command

    Reserved Reserved Reserved Allocation Length 8-15 Vendor ID (8 ASCII characters) ASCII “Seagate “ 16-31 Product ID (16 ASCII characters ASCII “STT8000A “ The INQUIRY command is always accepted, regardless of the state of the DSC bit. The command does not modify the status of DSC. The INQUIRY command returns the lesser of 36 bytes or the Allocation Length parameter of information.

  • Page 49: Load/Unload Command

    BOT or EOT end (as selected), then causes the drive to report not ready to any subsequent media access commands. Either a manual load operation or LOAD command is required for the drive to return to ready. STT8000A Product Manual Page 41...

  • Page 50: Locate Command

    LOCATE to Block 0 might or might not report a Blank Check error. The DSC bit is reset (0) after this command is accepted and is set (1) when completed. REQUEST SENSE can then be used to verify successful command completion. Page 42 STT8000A Product Manual...

  • Page 51: Log Select Command

    Parameter List Length is 0, the error counters are all reset (0). All of the counters defined in the Log Sense command are reset by the Log Select command and are otherwise only cleared by a power-on (hard) or ATAPI reset. STT8000A Product Manual Page 43...

  • Page 52: Log Sense Command

    Meaning Page Code Supported Log Pages Page Reserved Page Length 00,04h 4 Supported Pages First Supported Page Supported Log Pages Page Code Error Counter (Read) Page Code Tape Capacity Page Code Last Supported Page Filler Page 44 STT8000A Product Manual...

  • Page 53: Error Counter Page (Read)

    Even Tracks (reverse) Read Retries N,N,N,N Counter Value 44,45 Parameter Code 8023h Odd Tracks Read Retries Code Parameter Bits Device Controlled Counter Parameter Length 4-byte Counter 48-51 Odd Tracks (Forward) Read Retries N,N,N,N Counter Value STT8000A Product Manual Page 45...

  • Page 54: Tape Capacity Page Code

    The Parameter bit, TSD (not shown), is zero implying that the drive can save parameters across resets, etc. Parameters are not saved but are re-computed correctly from any logical position, regardless of the previous states of the tape drive. Page 46 STT8000A Product Manual...

  • Page 55: Mode Select Command

    If an attempt is made to send a page with a length not equal to the parameter length reported for that page by the Mode Sense command. If an attempt is made to send a value for a parameter that is outside the range supported by the device. STT8000A Product Manual Page 47...

  • Page 56: Mode Sense Command

    The following pages are supported for Mode Select and Mode Sense commands. Page Code Description Medium Partition Page Capabilities and Mechanical Status Page Tape Parameters Page (MFM mode) Return All Pages Page 48 STT8000A Product Manual...

  • Page 57: Mode Parameter Header

    The Number of Blocks is 0, indicating that all blocks in the media match this descriptor, (the blocks are fixed 512 byte blocks). None of the Block Descriptor parameters may be changed (Block Length is fixed). STT8000A Product Manual Page 49...

  • Page 58: Mode Medium Partition Page

    Current transfer rate per second) 16,17 Buffer Size (in 512 bytes) 02D8h 14 frames of 52 blocks = 728 18-19 Reserved — None of the Mode Capabilities and Mechanical Status Page (2Ah) parameters can be changed. Page 50 STT8000A Product Manual...

  • Page 59: Mode Tape Parameters Page

    This page is used for MFM (Modified Frequency Modulation), or floppy interface tape formats, such as 2080, 2120, TR1, TR2, TR3, etc. The STT8000A supports the reading of MFM tapes, but does not support write or format operations on MFM tapes.

  • Page 60: Read Command

    DSC bit is reset (0) will keep the ATA bus busy (BSY = 1) while the drive is reading the required data into the buffer. This delay could be more than a minute if exhaustive retries are required to read the data. Page 52 STT8000A Product Manual...

  • Page 61: Read Position Command

    Logical Number of next block to transfer between host and buffer (Host Block Location) 8-11 Last Block Location NNNNNNNN* Not Supported (Medium Block Location) Reserved — 13-15 Blocks in Buffer 000000* Not Supported 16-19 Bytes in Buffer 00000000* Not Supported STT8000A Product Manual Page 53...
  • Page 62 “wait” for any previous command to complete. This can be useful for applications with ATAPI only access to determine the actual completion of a command. Note, this will keep the ATA bus busy during the “wait”. DSC polling (to wait for DSC set) is preferred when possible. Page 54 STT8000A Product Manual...

  • Page 63: Request Sense Command

    If a command completes with a check (error) condition, the next command issued, if not Request Sense or Inquiry, will be aborted, and a deferred error will be reported. If the command is Request Sense, a non-deferred error is reported. The Inquiry command does not affect status reporting. STT8000A Product Manual Page 55...
  • Page 64 Additional Sense Code (ASC) Additional Sense Code Qualifier (ASCQ) Field Replaceable Unit Code Not Supported SKSV + Sense Key Specific Not Supported 16,17 Sense Key Specific 0000h Not Supported 18,19 0000h Pad to 4-byte boundary Page 56 STT8000A Product Manual...

  • Page 65: Rewind Command

    The DSC bit is reset (0) after this command is accepted and is set (1) when the drive is ready to write at BOP0 (or encountered a hardware error). REQUEST SENSE can then be used to verify successful command completion. STT8000A Product Manual Page 57...

  • Page 66: Space Command

    The DSC bit is reset (0) after this command is accepted and is set (1) when the command is completed and the drive is ready. REQUEST SENSE can then be used to verify successful command completion. Page 58 STT8000A Product Manual...

  • Page 67: Test Unit Ready Command

    ATA bus. On some other ATAPI tape drives, Test Unit Ready does not wait for DSC set before completing, and if an application needs to “wait” for an command done via the ATAPI interface, Read Position should be used instead. STT8000A Product Manual Page 59...

  • Page 68: Write Command

    This bit is set (1) when there are at least 52 empty blocks in the buffer available for the next WRITE command. Issuing a WRITE command when the DSC bit is reset (0) will keep the ATA bus busy (BSY=1) until buffer Page 60 STT8000A Product Manual...

  • Page 69: Write Filemark Command

    The Immed bit in the command packet is ignored, and the DSC bit is reset (0) after this command is accepted. The DSC bit is set (1) after the EOD has been successfully written. REQUEST SENSE can then be used to verify successful command completion. STT8000A Product Manual Page 61...

  • Page 70: Write Buffer (Download Microcode) Command

    (download microcode and save). The drive must be Not Ready (unloaded) for this command to be accepted, and the transfer length is set to the download file size, which is currently 0x026800. All data is transferred in one command. Page 62 STT8000A Product Manual...

  • Page 71: Tape Format

    1. Thus, track 3 is above track 1, and track 5 is above track 3, and so up to track 71, which is the closest to the upper edge of the tape. STT8000A Product Manual Page 63...

  • Page 72: Track Numbering

    8-bit bytes, which are numbered b0 to b7 with b7 being the most significant bit. A frame is made up of 64 blocks—52 data blocks plus 12 error-correction code (ECC) blocks. Figure 6-1 illustrates the general track layout of sequentially recorded frames. Page 64 STT8000A Product Manual...
  • Page 73 An EOD frame is an absolute indicator of the end of the recorded data. It is recorded after the last frame containing host data upon terminating a Write process. STT8000A Product Manual Page 65...

  • Page 74: Blocks

    (BOT) hole and the load point market (LP) hole. The same pattern is recorded between the end-of-tape (EOT) hole and the early warning (EW) hole. The servo pattern is written across the entire width of the tape. Page 66 STT8000A Product Manual...

  • Page 75: Write Equalization

    To reduce problems resulting from long strings of repetitive data with a bad peak shift or amplitude characteristics, a data randomizer algorithm is used on all bytes in the data and control area of each block. This randomizing takes place prior to the encoding of the data. STT8000A Product Manual Page 67...
  • Page 76 Chapter 6 Tape format Notes Page 68 STT8000A Product Manual...

  • Page 77: Theory Of Operations

    Chapter 7 Theory of operations Overview The STT8000 ATAPI minicartridge drive is based on proven Seagate designs, Seagate firmware, and the latest technology. This drive uses second generation, custom LSIs for efficient circuit layout and increased reliability with low power consumption.

  • Page 78: Mechanics

    3.5-inch by one inch form factor. A 5.25-inch mounting kit is an available option. The bezel is a simple snap-on design that is available in several standard and custom colors. The round, front-panel LED is amber and indicates tape activity. Page 70 STT8000A Product Manual...

  • Page 79: Control Circuits

    The circuitry includes 128 KB of flash EEPROM. You can load new firmware by using a specially encoded firmware upgrade cartridge. Refer to chapter 4 for information about loading new firmware using a Seagate firmware upgrade cartridge. Sensors and switches A number of mechanical and optical sensors and switches are integrated in the drive design.

  • Page 80: Media-Travan Minicartridges

    The position of the sliding write- protect tab on the cartridge determines whether or not data can be written to the tape. See chapter 4 for illustrations of the write-protect position. Page 72 STT8000A Product Manual...
  • Page 81 Compressed data requires less storage space than uncompressed data. Data Density—The number of single-byte characters stored per unit length of track. Usually expressed as bits-per-inch (bpi). Decompression—The process of restoring compressed data to its original state. STT8000A Product Manual Page 73...
  • Page 82 Media Header block—A unique block identifying the type of format being recorded. Noise—A disturbance of the signal caused by the read channel, write channel, head/tape interaction, or conducted or radiated sources. Page 74 STT8000A Product Manual...
  • Page 83 Uncorrected Bit Error Rate—The probability of a bit being in error, without using any error correction techniques. Underrun—A condition developed when the host transmits or receives data at a rate less than required by the device for streaming operation. STT8000A Product Manual Page 75...
  • Page 84 Appendix A Glossary Notes Page 76 STT8000A Product Manual...

  • Page 85: Acronyms And Abbreviations

    European Computer Manufacturers Association EEPROM Electronically Erasable, Programmable Read-Only Memory End of Data End of Media End Of Tape Federal Communications Commission FTPI Flux Transitions Per Inch International Electrotechnical Commission Inches Per Second Light Emitting Diode STT8000A Product Manual Page 77...
  • Page 86 Mean Time To Repair Original Equipment Manufacturer Printed Circuit Board Quarter Inch Cartridge Drive Standards, Incorporated Random Access Memory Run Length Limited SCSI Small Computer System Interface Underwriters' Laboratories, Inc. Volts Direct Current Verband Deutscher Electrotechniker Page 78 STT8000A Product Manual...

  • Page 87: Units Of Measurement

    32.17 feet per second 2 Gbyte gigabyte Hertz inch kilo Kbyte kilobyte kilogram kilohertz lb(s) pound(s) meter mega Mbits megabits Mbyte megabyte megaHertz minute millimeter millisecond revolutions per minute Volt Watt STT8000A Product Manual Page 79...
  • Page 88 Appendix B Acronyms and Measurements Page 80 STT8000A Product Manual...

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