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| | RAID (Redundant Array of Independent Disks) |
 | | RAID level 1 is at a high cost because you write the same information to all of the disks in the array, which wastes drive space. | | | Array capacity is equal to the capacity of one member disk. | | | RAID level 4 takes up the same amount of space as RAID level 5, but level 5 has many advantages over level 4 which is why it is not supported. |
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http://www.redhat.com/docs/manuals/linux/RHL-6.2-Manual/ref-guide/ch-raid.html
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| | RAID (Redundant Array of Independent Disks) |
| | RAID is a purpose of storing the same data in different places on multiple hard disks and improves storage subsystem performance. | | | The disk array data capacity is equal to the number of members times the smallest member capacity. | | | RAID level 0, which is the fastest drive array you can have, is a performance-oriented disk mapping method. |
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http://usa.aopen.com/tech/techinside/RAID.htm
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| | RAID - Free Computer Science Tutorials - Provided by Laynetworks.com - Lay Networks |
| | The only problem that level 4 RAID arrays have is that there is a bottleneck when writing data since the parity drive does not benefit from the performance enhancement of data striping. | | | Level 1 RAID arrays are also known as 'Mirroring and Duplexing.' Though they are both forms of the same technology, level 1 RAID arrays provide none of the same benefits of level 0 arrays. | | | With a level 1 RAID array, the data is written to every drive in the array simultaneously. |
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http://www.laynetworks.com/RAID-Tutorial.htm
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| | RAID: Redundant Array of [IndependentInexpensive] Disks at Matt Croydon::Postneo 2.0 |
| | RAID 5 is the most commonly deployed configuration [7] in commercial settings and distributes the parity blocks evenly across all disks [2]. | | | RAID can be accomplished on either the hardware or software level. | | | RAID 5 requires a “read-modify-write” [2] cycle to calculate and write parity information, so RAID 5 is less than optimal when it comes to many small writes. |
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http://www.postneo.com/2005/06/03/raid-redundant-array-of-independent-disks-paper
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| | Redundant array of independent disks - Wikimedia Commons |
| | In computing, a redundant array of inexpensive disks (more commonly known as a RAID) is a system of using multiple hard drives for sharing or replicating data among the drives. | | | Depending on the version chosen the benefit of RAID is a one or more of increased data integrity, fault-tolerance, throughput or capacity compared to single drives. | | | Redundant array of independent disks - Wikimedia Commons |
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http://commons.wikimedia.org/wiki/Redundant_array_of_independent_disks
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| | What is RAID by RaidWeb |
| | RAID boxes provide the user a way to access multiple individual hard disks as if they were one larger disk, spreading data access out over the multiple disks, which reduces the risk of losing all data if one drive fails. | | | Data sectors are distributed as with disk stripping, redundant information is interspersed with user data. | | | The array capacity is N-1, with a minimum of 3 drives required. |
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http://www.raidweb.com/whatis.html
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| | RAID - Redundant Array of Independent Disks |
| | Once a failed disk was replaced, either by a human operator or by electronic switching, data would be reconstructed onto it automatically. | | | RAID is a configuration of 2 or more hard drives, that uses various algorithms that are based on two concepts: | | | RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate disk drive |
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http://www.infocellar.com/hardware/raid.htm
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| | RAID (redundant array of independent disks) |
| | RAID uses a collection of disks of the same type to provide data protection, spreading data across the disks in such a way as to maximize the recoverability of the data if there is a single disk failure. | | | In effect, the RAID controller aggregates the disks and presents a single disk image to host operating systems so that applications never have to know where or how the data are being placed on the storage media. | | | A RAID subsystem is an example of aggregation combined with virtualization. |
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http://www.networkworld.com/details/728.html
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| | Clouten: Sharing Expertise and Resources |
| | Hard disk drives in computers have developed rapidly in their storage capacity. | | | Multi-volume, multi-media encyclopedia on a single disk.) CD-ROMs and other memory devices are now capable of storing vast quantities of full-text, which can be scanned into electronic form. | | | It is likely that more often those resources will include the full-text of books and periodicals that we will never own, but which are stored somewhere out there in cyberspace--it could be anywhere on the face of the earth--that we access from a computer workstation or terminal in our library. |
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http://www.asdal.org/minutes/share.html
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