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

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.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.1377 ◽

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.

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Next-generation fabrication technologies for optical pickup devices in high-density optical disk storage systems

10.1117/12.347712 ◽

1999 ◽

Author(s):

Shigeru Hosoe

Keyword(s):

Storage Systems ◽

Optical Disk ◽

High Density ◽

Next Generation ◽

Optical Pickup ◽

Disk Storage

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HS-RAID2: Optimizing Small Write Performance in HS-RAID

Journal of Electrical and Computer Engineering ◽

10.1155/2016/7341735 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Yongfeng Dong ◽

Jingyu Liu ◽

Jie Yan ◽

Hongpu Liu ◽

Youxi Wu

Keyword(s):

Storage Systems ◽

Experimental Results

HS-RAID (Hybrid Semi-RAID), a power-aware RAID, saves energy by grouping disks in the array. All of the write operations in HS-RAID are small write which degrade the storage system’s performance severely. In this paper, we propose a redundancy algorithm, data incremental parity algorithm (DIP), which employs HS-RAID to minimize the write penalty and improves the performance and reliability of the storage systems. The experimental results show that HS-RAID2(HS-RAID with DIP) is faster and has higher reliability than HS-RAID remarkably.

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Energy-Saving Techniques for Disk Storage Systems

Handbook of Energy-Aware and Green Computing, Volume 1 ◽

10.1201/b11643-14 ◽

2012 ◽

pp. 165-186

Keyword(s):

Energy Saving ◽

Storage Systems ◽

Disk Storage

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A File Allocation Strategy for Energy-Efficient Disk Storage Systems

10.2172/934979 ◽

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

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Reparo: A Fast RAID Recovery Scheme for Ultra-large SSDs

ACM Transactions on Storage ◽

10.1145/3450977 ◽

2021 ◽

Vol 17 (3) ◽

pp. 1-24

Author(s):

Duwon Hong ◽

Keonsoo Ha ◽

Minseok Ko ◽

Myoungjun Chun ◽

Yoona Kim ◽

...

Keyword(s):

Storage Systems ◽

Storage System ◽

Experimental Results ◽

Huge Amount ◽

Failure Characteristics ◽

System A ◽

Recovery Scheme ◽

Cost Efficient ◽

Recovery Schemes ◽

Multi Core Processor

A recent ultra-large SSD (e.g., a 32-TB SSD) provides many benefits in building cost-efficient enterprise storage systems. Owing to its large capacity, however, when such SSDs fail in a RAID storage system, a long rebuild overhead is inevitable for RAID reconstruction that requires a huge amount of data copies among SSDs. Motivated by modern SSD failure characteristics, we propose a new recovery scheme, called reparo , for a RAID storage system with ultra-large SSDs. Unlike existing RAID recovery schemes, reparo repairs a failed SSD at the NAND die granularity without replacing it with a new SSD, thus avoiding most of the inter-SSD data copies during a RAID recovery step. When a NAND die of an SSD fails, reparo exploits a multi-core processor of the SSD controller in identifying failed LBAs from the failed NAND die and recovering data from the failed LBAs. Furthermore, reparo ensures no negative post-recovery impact on the performance and lifetime of the repaired SSD. Experimental results using 32-TB enterprise SSDs show that reparo can recover from a NAND die failure about 57 times faster than the existing rebuild method while little degradation on the SSD performance and lifetime is observed after recovery.

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Storage Systems for Data Warehousing

Encyclopedia of Data Warehousing and Mining, Second Edition ◽

10.4018/978-1-60566-010-3.ch284 ◽

2011 ◽

pp. 1859-1864 ◽

Cited By ~ 1

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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