Present performance and future directions in two-photon addressed write once read many (WORM) volumetric optical disk storage systems

2003 ◽  
Author(s):  
Sadik C. Esener ◽  
Edwin P. Walker ◽  
Yi Zhang ◽  
Alexander S. Dvornikov ◽  
Peter M. Rentzepis
Keyword(s):  
Storage Systems ◽  
Optical Disk ◽  
Future Directions ◽  
Disk Storage ◽  
Two Photon

Two-photon volumetric optical disk storage systems experimental results and potentials

2003 ◽  
Author(s):  
Edwin P. Walker ◽  
Yi Zhang ◽  
Alexandr Dvornik ◽  
Peter Rentzepis ◽  
Sadik Esener
Keyword(s):  
Storage Systems ◽  
Optical Disk ◽  
Experimental Results ◽  
Disk Storage ◽  
Two Photon

scholarly journals IUE Studies of Hot Binary Stars

1992 ◽  
Vol 135 ◽  
pp. 393-395
Author(s):  
David J. Stickland
Keyword(s):  
Binary Stars ◽  
Storage Systems ◽  
Optical Disk ◽  
Public Access ◽  
High Dispersion ◽  
Disk Storage ◽  
International Ultraviolet Explorer ◽  
On Line ◽  
To Come ◽  
Reduced Data

The International Ultraviolet Explorer (IUE) was launched on 26th January 1978 and is still fully operational today, with several more years hopefully to come. After six months, the fully–reduced data is consigned to public–access archives maintained by the project agencies (NASA, ESA, and SERC). Thus, in addition to observations from current and future programmes, there are ~12,000 high–dispersion (Δλ ~ 0.15Å) spectra readily available now for research on stars hotter than about mid-B type. Furthermore, a uniform reprocessing, with optimum schemes, of all past IUE images has begun, to create the Final Archive which will be made accessible on–line through optical disk storage systems and will ensure the value of IUE data well into the future.

Research on the Application of DVD Pick-Up Head in Three-Dimensional Optical Storage

2011 ◽  
Vol 291-294 ◽  
pp. 1377-1380
Author(s):  
Jian Wen Cai ◽  
Fei Meng ◽  
Ya Feng Zhang ◽  
Mei Feng Zhang ◽  
Xue Tao Pan
Keyword(s):  
Data Storage ◽  
Storage System ◽  
Three Dimensional ◽  
Optical Storage ◽  
Optical Disk ◽  
Photon Absorption ◽  
Optical Data ◽  
Error Signal ◽  
Disk Storage ◽  
Two Photon

Two-photon three-dimensional optical data storage is an effective method for high capacity data storage. Based on DVD pick-up head and two-photon absorption, two-photon three-dimensional optical disk storage system is built, and operating principle of the overall system is in detail. In the servo module of three-dimensional optical disk storage system, DVD circuit control board (MT1389SE) is conducted on three-point improvement: extract focus servo error signal and servo error signal, increase four communications interfaces，increase photoelectric detectors; the extraction of focus and track servo signal on reading and writing module is analyzed in detailed. The measured principles and methods of the voice coil motor characteristic curve of Sanyo DVD pick-up head (SF-HD60S) are analyzed in detailed by using dual-frequency laser interferometer, which can be well meet the layer selection requirements of three-dimensional optical storage. DVD pick-up head applied in three-dimensional optical storage overcomes the limitations of three-dimensional scanning stage, integrates with existing DVD servo technology, and lays a solid foundation for practical use of two-photon three-dimensional optical storage.

scholarly journals A File Allocation Strategy for Energy-Efficient Disk Storage Systems

2008 ◽  
Author(s):  
Ekow J Otoo ◽  
Ekow J. Otoo ◽  
Doron Rotem ◽  
Ali Pinar ◽  
Shi-Chiang Tsao
Keyword(s):  
Energy Efficient ◽  
Storage Systems ◽  
Allocation Strategy ◽  
Disk Storage ◽  
File Allocation

Storage Systems for Data Warehousing

2011 ◽  
pp. 1859-1864 ◽  
Author(s):  
Alexander Thomasian
Keyword(s):  
Data Storage ◽  
Concurrency Control ◽  
Storage Systems ◽  
Large Data ◽  
Cost Effective ◽  
Background Information ◽  
Disk Storage ◽  
Large Databases ◽  
Database Size ◽  
Time Required

Data storage requirements have consistently increased over time. According to the latest WinterCorp survey (http://www/WinterCorp.com), “The size of the world’s largest databases has tripled every two years since 2001.” With database size in excess of 1 terabyte, there is a clear need for storage systems that are both cost effective and highly reliable. Historically, large databases are implemented on mainframe systems. These systems are large and expensive to purchase and maintain. In recent years, large data warehouse applications are being deployed on Linux and Windows hosts, as replacements for the existing mainframe systems. These systems are significantly less expensive to purchase while requiring less resources to run and maintain. With large databases it is less feasible, and less cost effective, to use tapes for backup and restore. The time required to copy terabytes of data from a database to a serial medium (streaming tape) is measured in hours, which would significantly degrade performance and decreases availability. Alternatives to serial backup include local replication, mirroring, or geoplexing of data. The increasing demands of larger databases must be met by less expensive disk storage systems, which are yet highly reliable and less susceptible to data loss. This article is organized into five sections. The first section provides background information that serves to introduce the concepts of disk arrays. The following three sections detail the concepts used to build complex storage systems. The focus of these sections is to detail: (i) Redundant Arrays of Independent Disks (RAID) arrays; (ii) multilevel RAID (MRAID); (iii) concurrency control and storage transactions. The conclusion contains a brief survey of modular storage prototypes.

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