Holographic Data Storage

Transcription

1 Holographic Data Storage Seminar Report Submitted in partial fulfilment of the requirements for the award of the degree of Bachelor of Technology in Computer Science Engineering of Cochin University Of Science And Technology by MAZIN ISMAIL ( ) DIVISION OF COMPUTER SCIENCE SCHOOL OF ENGINEERING COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY KOCHI AUGUST 2010

2 DIVISION OF COMPUTER SCIENCE SCHOOL OF ENGINEERING COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY KOCHI Certificate Certified that this is a bonafide record of the seminar entitled HOLOGRAPHIC DATA STORAGE presented by the following student MAZIN ISMAIL of the VII th semester, Computer Science and Engineering in the year 2010 in partial fulfillment of the requirements in the award of Degree of Bachelor of Technology in Computer Science and Engineering of Cochin University of Science and Technology. Mr. SUDHEEP ELAYIDOM SEMINAR GUIDE Dr. DAVID PETER HEAD OF DIVISION

3 ACKNOWLEDGEMENT I thank GOD almighty for guiding me throughout the seminar. I would like to thank all those who have contributed to the completion of t he seminar and helped me with valuable suggestions for improvement. I am extremely grateful to Dr. David Peter, Head Of Division, Division of Computer Science, for providing me with best facilities and atmosphere for the creative work guidance and encouragement. I would like to thank my coordinator and guide, Mr. Sudheep Elayidom, Sr. Lecturer, Division of Computer Science, for all help and support extend to me. I thank all Staff members of my college and friends for extending their cooperation during my seminar. Above all I would like to thank my parents without whose blessings; I would not have been able to accomplish my goal. MAZIN ISMAIL

4 ABSTRACT The growing demands of high definition digital video content, fixed content data, and compliance and security application will soon outstrip the capabilities of current storage technologies to keep up the demand. Clearly a new storage paradigm is needed to meet the growing storage demands. So what is it going to be? With its omnipresent computer, all connected via the internet, the information age has led to an explosion of information available to users. The decreasing cost of storing data and the increasing storage capability of the same small device footprint have been key enablers of this revolution. While current storage needs are being met, storage technology must continue to improve in order to keep pace with the rapidly increasing demand. So how is it going to be? Both magnetic and conventional optical data storage technologies, where individual bits are stored as distinct magnetic or optical changes on the surface of a recording medium are approaching physical limits beyond which individual bits may be too small or too difficult to store. So what next step is going to be? Storing information throughout the volume of a medium, not just on its surface is an intriguing solution to our entire problem regarding storage. So this is it, Holographic Data Storage. Holographic Data Storage is a volumetric approach which, although conceived decades ago, has made recent progress towards practicality with the appearance of lower-cost enabling technologies, significant results from longstanding research efforts and progress in holographic recording materials. This is a quest to find the answer to these entire questions, the technology and the story behind the next revolution in data storage.

5 PREFACE This is the report of the seminar conducted by me during my seventh semester of my college study in School of Engineering, Cochin University Of Science And Technology for Bachelor Degree in Computer Science Engineering. The seminar is on Holographic Data Storage, a revolutionary idea in the field of data storage system. The report has been carefully created such that it conveys the idea right from the basics to the higher level of the topic. First an introduction about the topic is given. The history of the Holographic Data Storage follows the introduction. Then the basic working of the Holographic Data Storage is discussed. And then the principle behind the Holographic Data Storage is discussed in detail. The topic such as searching the data, system architecture, various ways of multiplexing, coding and signal processing is discussed thereafter. The biggest challenge in realization of the Holographic Data Storage is to find a suitable media for storage. The problem and the solution during the quest to find the media for Holographic Data Storage are discussed in detail. The report concludes by comparing the Holographic Data Storage with the other systems that exist today and discussing about the application part of it. I have found this topic to be very interesting and have spend large amount of time trying to understand more about Holographic Data Storage and for updating my knowledge with the latest development in the field. I hope that you will also find this as a very interesting piece of technology.

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7 6 TYPES Read Only Read-Write.15 7 MORE ON HVD Competing Technologies HVD Adoption HSD Forum Standards Storage Capacity HVD at a Glance COMPARISON DEVELOPMENT ISSUES HOLOGRAPHIC STORAGE PRODUCTS Inphase Technologies Holographic Roadmap Turner on-air demonstration Polaroid Spinoff Aprilis CONCLUSIION.26 REFERENCE..27

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31 10. HOLOGRAPHIC STORAGE PRODUCTS 10.1 Inphase Technologies Only recently has there been a convergence of factors which have allowed InPhase to develop a commercially-viable holographic storage device. Among these is the availability of key components such as blue lasers as well as SLMs and camera chips with sufficiently high resolution. Another key factor is the development of Tapestry media with appropriate optical qualities, manufacturability, and archive life. Finally, techniques such as polytopic multiplexing enable significantly higher storage densities, ensuring competitive storage capacities and prices. The initial InPhase holographic storage drive will be a WORM drive that is capable of sequential writes and random reads. It contains a large 2 GB buffer to cache the writes, in order to optimize performance through long uninterrupted write sessions. The drive is capable of emulating a variety of existing storage devices such as LTO tape and magneto-optical (MO) drives. Initially, the drive will have a SCSI interface, although the modular design of the drive enables future interfaces to be of an almost unlimited variety, including Fiber Channel, Giga Ethernet, SATA, SAS,USB 2, SAS and others. The result of these standard interfaces and drive emulations means that existing applications can easily interface to the holographic drive as if it were a tape, with no changes to the application.

32 10.2Holographic Roadmap The first holographic storage products from InPhase Technologies will target the professional archive and near-line storage markets, with WORM drives and media. These initial products will have a capacity of 300 GB of uncompressed data, with read and write transfer rates of 20 MB/s. Subsequent generations of WORM devices will increase the capacity to 800 GB and the transfer rates to 80 MB/s and then to 1.6 TB and 120 MB/s respectively. InPhase is also developing rewritable holographic media, which will enable media to be erased and reused. The initial rewritable product will have an 800 GB capacity and a transfer rate of 80 MB/s, increasing to 1.6 TB and 120 MB/s respectively. Finally, holographic storage is also highly adaptable to low-cost read-only applications. Holographic readers can be developed very cheaply, since they do not need to contain expensive optics. Duplication technology is fast and very inexpensive. Although not shown in Fig. 4, InPhase is also developing a portable handheld holographic device for consumer use.

33 10.3 Turner on-air demonstration In October 2005, Turner Network Television (TNT) became the first television network to air content originating on holographic storage media. Engineers from InPhase Technologies and Turner Broadcasting System (TBS) Inc. ingested a promotional advertisement into an InPhase s TapestryTM holographic disk as a data file. The advert was recorded by InPhase s holographic prototype drive onto the holographic disk which was then electronically migrated to a server and played back to air at the scheduled time. This promotional ad. remains active in Turner s system and is aired whenever called for by the programme schedule of TNT. The benefits of the InPhase holographic solution, as described by Turner, include large capacity, random access to content, high bandwidth as well as inexpensive, secure and portable media Polaroid Spinoff Aprilis Read-only holographic storage seems poised to take a step ahead on Tuesday, when Polaroid spinoff Aprilis will announce that it is providing its write-once holographic media to customers in Japan and Korea. Aprilis, like rivals InPhase Technologies and Japan's Optware, are pushing forward on so-called holographic storage, which optically records data bits in three dimensions rather then on a flat plane. Depending upon how the bits are organized, Aprilis claims a single 120-mm CD-like disc can store between 60 to 200 Gbytes. Aprilis has begun delivering its Holographic Media Disk (HMD) media to a "major electronics player in Korea and a few in Japan", according to John Berg, president and chief executive officer of Aprilis.

34 For now, Aprilis is developing a method to allow manufacturers to write to the media once, while permitting unlimited reads--similar to the CD-ROMs in use today. The company's argument is that as more and more digital content is created, consumers will want ever better quality, such as the digital cinemas used to show the recent Star Wars film. That, in turn, means larger file sizes. Today, DVD-ROMs are the most common form of storing digital content like movies, and a DVD-ROM can store between about 4 and 15 Gbytes, depending upon the number of recording layers used. In February, nine of the world's largest consumer electronics manufacturers agreed to develop blue laser or "Blu-Ray" technology, which would initially allow 27 Gbytes of data to be stored on a single disc,. Later, the group said, 30 Gbytes could be crammed onto a single-sided, single-layer disc and over 50 Gbytes onto a single-sided, doublelayer disc. That's where Aprilis could come in. "We're thinking of the next step beyond DVD," Berg said. Berg said that Aprilis has begun making media in low volume, and will move to a more refined process in the second half of the year. "The media is available today," Berg said. "We are producing samples now and are doing pilot production on our first generation equipment now. Our second generation production equipment is currently being assembled at Aprilis and we will start exercising that before the end of the year. Our production rate is less than 4 minutes per disk in low volume." Aprilis will also deliver its media in a card format, although Berg said he didn't believe that form factor would be popular enough to turn into a product.

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