Seagate STT8000A Manual Page 79
- Page / 88
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
Theory of operations Chapter 7
STT8000A Product Manual Page 71
Control circuits
The control logic module shown in Figure 7-1 includes a buffer manager to handle
data movement between the controller, the buffer, and the tape formatter. This
module also includes logic to perform ECC and CRC generation and testing,
WRITE/READ data formatting, head stepper control, and drive motor control.
The microprocessor directs all functions performed by the control logic. The
instructions are read from a flash EEPROM, which can be updated with new
firmware through a specially written tape cartridge.
The 512-KB DRAM data buffer allows the drive to maintain streaming when the host
cannot provide data continuously at the tape streaming rate.
The write driver receives data from the write formatter and generates write current,
causing data to be written on tape by the tape head.
The read channel amplifies and conditions the signal from the tape head and passes
it back to the read formatter.
The head stepper and drive motor both receive current from the control logic to
control the stepping of the head from track to track and to move the tape forward
and back across the tape head.
Head design
The recording/playback head is a state-of-the art, thin-film design—a thin-film
inductive write head paired with an advanced magneto-resistive read head. This
head design provides the drive with exceptional performance and reliability. The
material composition of the head also results in exceptional wear characteristics,
resulting in stable performance throughout the life of the drive.
Flash EEPROM
Because the drive uses flash EEPROM (electronically erasable, programmable
read-only memory), the drive firmware can be easily upgraded when new revisions
of the firmware are released. 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. The Cartridge In switch detects when a cartridge is fully loaded and
positioned against the A-plane datum of the cartridge. The Unsafe switch senses
- STT8000A 1
- ATAPI Minicartridge Drive 1
- Product Manual 1
- Technology, Inc 2
- FCC Notice 3
- Table of Contents 5
- ATAPI interface 31 6
- Tape format 63 7
- Theory of operations 69 7
- Glossary 73 8
- Acronyms and measurements 77 8
- Introduction 9
- Figure 1-1 10
- Features 11
- Typical system configurations 12
- Flash EEPROM 13
- Software 13
- References 13
- About this manual 14
- Specifications 15
- Figure 2-1 16
- Figure 2-2 16
- Power specifications 17
- Performance specifications 18
- Environmental requirements 19
- Mean-Time-Between Failures 20
- Mean-Time-To-Repair 20
- Recommended tapes 21
- Tape capacities and formats 21
- Regulatory compliance 22
- Installation 23
- Handling guidelines 23
- Setting jumpers 24
- Installing the drive 25
- Mounting dimensions 26
- Figure 3-4 27
- Figure 3-5 27
- Chapter 3 Installation 28
- Installation Chapter 3 29
- DRIVE ACTIVE 31
- Using Travan cartridges 32
- Figure 4-4 33
- Figure 4-5 33
- Caring for tape cartridges 35
- Caring for the drive 35
- Capstan Tape Head 36
- Troubleshooting 37
- ATAPI interface 39
- ATA-2 Signals 39
- ATA registers 40
- ATAPI Interface Chapter 5 41
- Supported ATA Commands 42
- Chapter 5 ATAPI Interface 44
- Erase command 47
- Inquiry command 48
- Load/Unload command 49
- Locate command 50
- Log Select command 51
- Log Sense command 52
- Error Counter Page (Read) 53
- Tape Capacity Page Code 54
- Mode Select command 55
- Mode Sense command 56
- Mode Parameter Header 57
- Mode Block Descriptor 57
- Mode Medium Partition Page 58
- Mode Tape Parameters Page 59
- Read command 60
- Read Position command 61
- Request Sense command 63
- Rewind command 65
- Space command 66
- Test Unit Ready command 67
- Write command 68
- Write Filemark command 69
- Tape format 71
- Track numbering 72
- Track format 72
- Figure 6-1 73
- General track layout 73
- Figure 6-2 73
- General frame layout 73
- Tape reference servo pattern 74
- Write equalization 75
- Randomization 75
- Chapter 6 Tape format 76
- Overview 77
- Block diagram 77
- Cartridge load mechanism 78
- Capstan drive motor assembly 78
- Control circuits 79
- Head design 79
- Sensors and switches 79
- Media—Travan minicartridges 80
- Glossary 81
- Appendix A Glossary 82
- Glossary Appendix A 83
- Acronyms and measurements 85
- Units of measurement 87
Related products and manuals for Tape drives Seagate STT8000A
(56 pages)© 2020, manymanuals.com. All rights reserved. | 0.668 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals