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What are Data Tapes?
“Data storage device that reads and writes data on a magnetic tape”
• Magnetic Tape
– Long and narrow strip of plastic fil...
Digitization of Data
• Digital Recording
– Digital audio and video are directly recorded on a storage device
– Direct encoding of data into the...
History of Data Tapes
• Open Reels
– Wound on large (10.5 in/26.67 cm) reels
– Standard for large computers
• Univac
– First commercial data tap...
• IBM Formats
– Used ferrous-oxide coated tape
– Magnetic tape dimensions were 0.5 inch
– Wound on removable reels up to 1...
• DEC Tape I
– 0.75in wide tape, having:
• 6 data tracks
• 2 mark tracks
• 2 clock tracks
– Data recorded at roughly 350 b...
• Cartridges and Cassettes
– Cassette
• An enclosure that holds two reels
• Single span of magnetic tape
– Cartridge
• A s...
Technical details
• Tape Width
– Half inch
• Recording Method
– Linear
• Linear Serpentine
– Scanning
• Transverse
• Accurate
• Helical
Line...
• Data Blocks
– Data is written on tape in blocks
– Important to keep up with data rate
• Data Buffer
• Modern tapes offer...
• Access Time
– Tape
• Long latency for random accesses
– Alternatives available
• Indexing
• Marking blocks with a tape m...
Companies Venturing in Data Tapes
• 3M
• DEC
• Sony
• HP
• Quantum
• Storage Tek
• Maxell
• IBM
• Etc
Tape Products Available at ODSI
• 8 MM Tape
• AIT Tape
• Barcode Labels
• Cleaning Cartridges
• DDS Tape
• DLT Tape
• DTF Tape
• Enterprise Tape
• LTO Tap...
8MM Tapes
• Magnetic data storage
• Pioneered by Exabyte
• D8 – Abbreviation used by SONY
• Dual reels in cartridge
• First Commerci...
Advanced Intelligent Tape (AIT)
• Developed by SONY
• Dual reels in cartridge
• Provides backward and forward compatibility
• Uses helical scanning
• S-AI...
Barcode Labels
• Barcodes has adhesive backing
• Use for effective management of data tapes
• Alphanumeric coding
Cleaning Cartridges
Digital Data Storage Tapes (DDS)
• Store digital data on DAT Tape
• Tape width is 3.8mm
• Latest formats are 8mm wide
• Helical scan recording method
• Len...
Digital Linear Tapes (DLT)
• Magnetic tape data storage technology
• Owned by Quantum Corp.
• Linear serpentine recording
• Half-inch wide tape
• Tap...
Digital Tape Format (DTF)
• Magnetic tape data storage format
• Developed by Sony
• Uses a 1/2in wide tape
• Cassette with two reels
• Helical scan ...
Enterprise Tapes
• Half-inch tape technology
• Few are able to encrypt data
• Leading brands
– Sun
– Imation
– Fuji
– IBM
Linear Tape Open (LTO)
• Magnetic tape data storage
– Open standards
– Part of quantum corp.
– Developed as a replacement for DLT
– Standard form...
Optical Cartridges
• Capable of writing and rewriting data
• Available in 130 mm and 90 mm forms
• The disc consists of a ferromagnetic mater...
Quarter Inch Cartridge (QIC)
• Magnetic tape data storage format
• Enclosed in a package of aluminum and plastic
– Holds two tape reels driven by a sin...
RDX Cartridges
• Features a removable hard disk cartridge
– A docking station for operating the cartridge
• The highest capacity is 1 TB
...
SLR-MLR Tape
• Perfect backup for:
– Mid-sized servers
– Small data centers
– Workstations
• Named by Tandberg Data for its line of QIC...
T10000 Tape
• Latest Oracle/Sun Storage Tek tape drive
• Used with large computer system
• Tape cartridges are 1⁄2 in (13 mm) wide
• S...
Travan Tape
• 8 mm magnetic tape cartridge
• Developed by the 3M company
• 750 inch length
• Linear track recording technology
• Trava...
Tape Storage Cases
VAX Tape
• “Packet technology” data format
• Helical scan technology
• 2 read heads for Each stripe
– Each stripe starts with a uni...
Thank You
Website: www.odsi.co.uk Contact: +44 (0) 203 005 9500 Email: Sales@odsi.co.uk
Source: Wikipedia
Introduction to Data tapes
Introduction to Data tapes
Introduction to Data tapes
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Introduction to Data tapes

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Brief introduction to the mechanism behind data tape technology.
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Introduction to Data tapes

  1. 1. What are Data Tapes?
  2. 2. “Data storage device that reads and writes data on a magnetic tape” • Magnetic Tape – Long and narrow strip of plastic film – Magnetized undercoating of strip – Various levels of magnetized data are stored on strip • Magnetic Tape Data Storage – Digital recording on magnetic tape to store digital information – Commonly enclosed in cartridges and cassettes – Tape Drive performs writing or reading of data
  3. 3. Digitization of Data
  4. 4. • Digital Recording – Digital audio and video are directly recorded on a storage device – Direct encoding of data into the stream of discrete numbers which represents: • Changes in air pressure for audio and chroma & luminance values for video through time • Recording Process – Recording – Playback • Techniques to Record to Commercial Media – Digital Cassettes • Read/write head moves quickly in order to maintain a high enough speed to keep the bits at a manageable size – Optical Disc Recording • A laser is used to burn microscopic holes into the dye layer of the medium • A weaker laser is used to read these signals • Digital Information – Discrete, discontinuous representations of information or works
  5. 5. History of Data Tapes
  6. 6. • Open Reels – Wound on large (10.5 in/26.67 cm) reels – Standard for large computers • Univac – First commercial data tape UNIVAC I - 1951. – Used in UNISERVO – Drive’s recording medium: • A thin metal strip of 0.5 inch wide – Nickel-plated phosphor bronze • Recording density was 128 characters per inch – Linear speed of 100 in/s • Eight tracks: – Six data tracks – One parity track – One timing track
  7. 7. • IBM Formats – Used ferrous-oxide coated tape – Magnetic tape dimensions were 0.5 inch – Wound on removable reels up to 10.5 inches in diameter – Different tape lengths were available • 1200 ft., 2400 ft. • Introduction of half inch tapes – Tape lengths increased in 1980’s • Started using PET film – Early half-inch tape had 7 parallel tracks of data along the length – 9 track tapes supported the new 8-bit characters – Effective recording density increased over time • Common 7-track densities started at 200, then 556, and finally 800 cpi • 9-track tapes had densities of 800, 1600, and 6250 cpi • End of file was designated by a tape mark • End of tape by two tape marks
  8. 8. • DEC Tape I – 0.75in wide tape, having: • 6 data tracks • 2 mark tracks • 2 clock tracks – Data recorded at roughly 350 bits per inch – Durable to be used as the main storage medium for a OS – First time used file sharing system – Shoe shining – 1970’s – Slow disk drive • DEC Tape II – DEC tape II was introduced around 1978 – Same structure but used a much smaller 0.150 in tape – Enclosed in a cartridge – The TU58 DEC tape II drive had an RS232 serial interface • Allowed it to be used with the ordinary serial ports – Low cost floppy disk technology • DEC tape II got obsolete
  9. 9. • Cartridges and Cassettes – Cassette • An enclosure that holds two reels • Single span of magnetic tape – Cartridge • A single reel of tape in a plastic enclosure
  10. 10. Technical details
  11. 11. • Tape Width – Half inch • Recording Method – Linear • Linear Serpentine – Scanning • Transverse • Accurate • Helical Linear Recording Linear Serpentine Recording
  12. 12. • Data Blocks – Data is written on tape in blocks – Important to keep up with data rate • Data Buffer • Modern tapes offer speed matching feature • Sequential Access to Data – Tape provides sequential access to data • Takes 10s to reposition the tape head – Hard disk performs the action in 10s of milliseconds • Offers random access to data
  13. 13. • Access Time – Tape • Long latency for random accesses – Alternatives available • Indexing • Marking blocks with a tape mark • Data Compression – A ratio of 2:1 is typical – Some enterprise tape drives can encrypt data
  14. 14. Companies Venturing in Data Tapes
  15. 15. • 3M • DEC • Sony • HP • Quantum • Storage Tek • Maxell • IBM • Etc
  16. 16. Tape Products Available at ODSI
  17. 17. • 8 MM Tape • AIT Tape • Barcode Labels • Cleaning Cartridges • DDS Tape • DLT Tape • DTF Tape • Enterprise Tape • LTO Tape • T10000 Tape • Traven Tape • Tape Storage Cases • VXA Tape • Optical Cartridges • QIC Tape • RDX Cartridges • SDLT Tapes • SLR-MLR Tapes
  18. 18. 8MM Tapes
  19. 19. • Magnetic data storage • Pioneered by Exabyte • D8 – Abbreviation used by SONY • Dual reels in cartridge • First Commercial Helical Scan recording • Backward compatibility • 170m length can store up to 170 GB • Enhance length of 225m length stores 250 GB • Tape Mediums: – Metal Particles Tape – Advanced Metal Evaporated Tape (AME) – AME with Smart Clean
  20. 20. Advanced Intelligent Tape (AIT)
  21. 21. • Developed by SONY • Dual reels in cartridge • Provides backward and forward compatibility • Uses helical scanning • S-AIT is a variant – Wider tape in larger cartridge – Single reel • 25GB to 1040GB • Technical Features: – AME (Advanced metal evaporated) – MIC (Memory in chip) – R-MIC (Remote memory in cassette) – WORM (Write once read many)
  22. 22. Barcode Labels
  23. 23. • Barcodes has adhesive backing • Use for effective management of data tapes • Alphanumeric coding
  24. 24. Cleaning Cartridges
  25. 25. Digital Data Storage Tapes (DDS)
  26. 26. • Store digital data on DAT Tape • Tape width is 3.8mm • Latest formats are 8mm wide • Helical scan recording method • Length can be increased • 2GB to 160GB • DAT Tape: – Developed by SONY – Sequential transmission of data – Ability to record digital data at: • Higher lower and equal sampling rate
  27. 27. Digital Linear Tapes (DLT)
  28. 28. • Magnetic tape data storage technology • Owned by Quantum Corp. • Linear serpentine recording • Half-inch wide tape • Tape material is metal particle tape (MP/AMP) • Cartridges contain a single reel • Reel motors controls tape speed and tension – No capstan • DLT includes WORM capability • 2:1 data compression • SDLT is a variant
  29. 29. Digital Tape Format (DTF)
  30. 30. • Magnetic tape data storage format • Developed by Sony • Uses a 1/2in wide tape • Cassette with two reels • Helical scan process • Two sizes of tape cassettes; "S" and "L” • Highest capacity DTF 1 media tape is 42 GB • DTF 2 tape delivers storage capacity of 200 GB
  31. 31. Enterprise Tapes
  32. 32. • Half-inch tape technology • Few are able to encrypt data • Leading brands – Sun – Imation – Fuji – IBM
  33. 33. Linear Tape Open (LTO)
  34. 34. • Magnetic tape data storage – Open standards – Part of quantum corp. – Developed as a replacement for DLT – Standard form-factor goes by the name Ultrium • LTO version 6 holds 2.5tb – 1⁄2-inch wide tape in a single reel cartridge. • Ultrium drive reads data: – From a cartridge in its own generation – From cartridges of at least the two prior generations. • An Ultrium drive writes data: – To a cartridge in its own generation – To a cartridge from the immediate prior generation
  35. 35. Optical Cartridges
  36. 36. • Capable of writing and rewriting data • Available in 130 mm and 90 mm forms • The disc consists of a ferromagnetic material – Sealed beneath a plastic coating – Reliable and inexpensive medium – Designed in rewritable and WORM formats • Leading companies offering magneto optical cartridges: – Sony, verbatim, IBM, HP, Sony, Philips, Imation, Maxell
  37. 37. Quarter Inch Cartridge (QIC)
  38. 38. • Magnetic tape data storage format • Enclosed in a package of aluminum and plastic – Holds two tape reels driven by a single belt • The tape was originally 1⁄4-inch wide • Length is 300 to 1,500 feet – Motorized capstan • Data is written linearly along the length • Could also be written in "serpentine”
  39. 39. RDX Cartridges
  40. 40. • Features a removable hard disk cartridge – A docking station for operating the cartridge • The highest capacity is 1 TB • Shock-proof 2.5-inch Serial ATA hard disk drives
  41. 41. SLR-MLR Tape
  42. 42. • Perfect backup for: – Mid-sized servers – Small data centers – Workstations • Named by Tandberg Data for its line of QIC • The earliest SLR drive has a capacity of 250 MB • Latest drive has a capacity of 70 GB
  43. 43. T10000 Tape
  44. 44. • Latest Oracle/Sun Storage Tek tape drive • Used with large computer system • Tape cartridges are 1⁄2 in (13 mm) wide • Storage Capacity: – T10000A has a native capacity of 500 GB – T10000B drive support 1 TB – T10000C tape drive stores 5 TB natively
  45. 45. Travan Tape
  46. 46. • 8 mm magnetic tape cartridge • Developed by the 3M company • 750 inch length • Linear track recording technology • Travan does not verify data after writing • The tape is not attached to the hubs – Wrapped and held by friction
  47. 47. Tape Storage Cases
  48. 48. VAX Tape
  49. 49. • “Packet technology” data format • Helical scan technology • 2 read heads for Each stripe – Each stripe starts with a unique packet ID – Ends with an ECC packet checksum • Ensures data integrity
  50. 50. Thank You Website: www.odsi.co.uk Contact: +44 (0) 203 005 9500 Email: Sales@odsi.co.uk Source: Wikipedia

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