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Long-term Inactive Data Retention through Tape Storage Technology
Ivan VicanMetronet telecommunications d.d., Croatia
Ph.D. Hrvoje Stančić, assistant prof.Department of Information Sciences, Faculty of Humanities and Social Sciences, University of Zagreb
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Contents
1. Expanding the volume of digital data
2. Relevance of data over time
3. Tape systems
4. Tape standards: A. Linear Tape-Open technology
B. Enterprise Tape technology
5. Archiving capabilities
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1. Expanding the volume of digital data
• Digital data long-term retention for legal, administrative, historical or cultural heritage purposes
• Hyper production of digital data + digitization of conventional data
• How to sustain growth and accumulation of retained digital data?
• Tape storage technology as an adequate solution?
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2. Relevance of data over time
• Important variable that influences the choice of storage technology is frequency of reuse
• Data lifecycle is providing insight in data value fluctuation, which is measured by frequency in given time (business approach)
• Due to their nature and purpose, in institutions such as archives, museums and libraries data has a constant value
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2. Relevance of data over time …
Source: Horison Information Strategies
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3. Tape systems
• Devices that utilize tape medium• Three types of systems:
1.Tape drive - provides physical and logical structure for reading and writing processes.
2.Tape autoloader - tape drive and an automated tape cartridge exchange system with up to ten tape cartridges in the housing.
3.Tape library - two or more tape drives, depending on the quantity of tape cartridges which can rise up to a few thousand. Cartridges are exchanged with robotic mechanism.
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4. Tape standards: LTO (Linear Tape- Open) technology
• Developed at the end of 1990s by LTO Consortium
• First open format tape standard which features high capacity and performance for archiving purposes.
• Most commonly used tape storage standard
• Features data encryption and Write Once Read Many (WROM) capabilities at the device level
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4. Tape standards: LTO technology …
• Backward compatibility for two generations
• Clearly defined Six generation roadmap
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4. Tape standards: Enterprise tape technology
• Primary developed for the needs of mainframe systems
• Proprietary tape technologies• Used for transactional process with
application such as LOB (Line-Of-Business), OLTP (OnLine Transaction Processing), CRM (Customer Relationship Management) and other high duty cycle applications
• Enterprise tape technology is dominant in the Virtual Tape Libraries (VTL)
• Faster transfer rate and higher capacity
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5. Archiving capabilites
• In the past, reliability was the weakest point of the tape storage technology
• Drawbacks are solved with new technical features and fully automated systems
• Archival life of tape is up to 30 years
• High rate of load/unload cycles
• Entry level LTO-4 libraries are scalable up to native capacity of 20 TB, 40 TB and 2-4 tape drives
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5. Archiving capabilites …
• The tape libraries can be easily reconfigured and upgraded to the new tape technologies
• Open format standard with generation roadmap -> easier planning of digital archives
• Green technology
• Most affordable storage technology
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Conclusion
• Archives, museums and libraries – should hold dual tape systems – virtualization of data at disk storage while it is
being retrieved from tape storage – for users– secondary system (electronic vault) off site – not
for users – disaster recovery – tape storage• How much? 1TB = apx. 100.000 books • Entry LTO-4 (2 drives, 20 tape cartridges) =
apx. € 15,000 for 16TB system• Consider tape technology for large storage
systems!!!
Ivan Vican,[email protected]
Ph.D. Hrvoje Stančić, assistant [email protected]
THANK YOU!
Long-term Inactive Data Retention through Tape Storage Technology