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Topic: RAID

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	AC&NC \| RAID.edu - RAID Levels - RAID Level 5 - RAID 5
		Each entire data block is written on a data disk; parity for blocks in the same rank is generated on Writes, recorded in a distributed location and checked on Reads.
		RAID Level 5 requires a minimum of 3 drives to implement
		Difficult to rebuild in the event of a disk failure (as compared to RAID level 1)
	www.acnc.com /04_01_05.html (117 words)

	RAID - Wikipedia, the free encyclopedia
		RAID 0 is useful for setups such as large read-only NFS servers where mounting many disks is time-consuming or impossible and redundancy is irrelevant.
		RAID 5 implementations suffer from poor performance when faced with a workload which includes many writes which are smaller than the capacity of a single stripe; this is because parity must be updated on each write, requiring read-modify-write sequences for both the data block and the parity block.
		RAID 6 is inefficient when used with a small number of drives but as arrays become bigger and have more drives the loss in storage capacity becomes less important and the probability of two disks failing at once is bigger.
	en.wikipedia.org /wiki/Redundant_array_of_independent_disks (8627 words)

	Raid - Wikipedia, the free encyclopedia
		Raid (military), a sudden attack behind an enemy's lines without the intention of holding ground.
		Raid (game maneuver), a sudden invasion by an allied group in a real life game (such as capture the flag) or in a simulated game.
		Raid group, an instanced or outdoor encounter with a powerful opponent requiring a raiding party of twenty or more players to defeat.
	en.wikipedia.org /wiki/Raid (302 words)

	WoW -> PvP -> Raids
		In some cases, you might be able to encounter a higher-tiered raid boss, but you couldn't actually defeat it until your AC or resists or basic stats were pumped up by acquiring items from lower-level tiered raid bosses.
		So once you form a raid and go into a raid instance, it will be the only version of the instance you are going to be able to enter until it resets.
		She is also going to drop loot that is necessary to beat a higher-tiered raid boss, but that loot can also be fashioned into some of the best equipment in the game.
	www.worldofwarcraft.com /pvp/raid-article.html (2080 words)

	What is RAID by RaidWeb (Site not responding. Last check: )
		RAID (Redundant Array of Independent Disks) is an acronym first used in a 1988.
		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.
		RAID 0: Also known as "Disk Striping", this is technically not a RAID level since it provides no fault tolerance.
	www.raidweb.com /whatis.html (589 words)

	RAID
		RAID performance refers to the time that it takes the hard drive to read and write information; fault-tolerance deals with the means to protect data stored on the hard drive.
		RAID is widely used in audio and video editing, where files are large in size and must be loaded and reloaded during the editing process.
		RAID is becoming more common and is included as a hardware performance solution by some high-end motherboard manufacturers.
	www.infopackets.com /freenewsarticles/raid.htm (887 words)

	RAID at Real-Storage
		The basic idea behind RAID is to combine multiple disk drives into an array that results in a capacity, performance, and reliability level exceeding the capabilities of any single large drive.
		The number of drives in the array and the way the data is split between them is what determines the RAID array level, the capacity of the array, and the overall performance and data protection characteristics of the RAID implementation.
		Most RAID setups consist of a number of physical drives made into a physical array, which is made into a logical array, which is then made into a logical drive.
	www.real-storage.com /raid.html (369 words)

	RAID: (Site not responding. Last check: )
		RAID Level 0 is a term we are using in this paper to refer to an array configuration with no redundancy.
		RAID Level 3 is almost identical to RAID Level 2, with only one optimization.
		RAID Level 1 should be most optimized for small read transaction processing because of the benefit of choosing the fastest access from two different read operations.
	www.ece.utexas.edu /~kettler/reports/RAID.html (5098 words)

	RAID PRIMER
		RAID 2 was not technically feasible, RAID 0+1 was born later and a multitude of marketing RAID levels (RAID 7, RAID 5 +1 and so on) have also hit the streets.
		RAID 0 allows a number of disk drives to be combined and presented as one large disk.
		RAID 5 offers the same level of security as RAID 4: when one disk drive fails, all data is fully available, the missing data is recalculated from the data still available and the parity information.
	www.finitesystems.com /PRODUCT/raid/raidlevel.htm (1857 words)

	Information and help with computer RAID.
		Implemented as striped RAID 0 array whose segments are RAID 3 arrays.
		Excellent solution for those considering RAID 3 as RAID 53 provides additional write performance, however, it is a very expensive solution and requires all drives to have the same synchronization.
		For example, RAID 0/1 would mean that it combines the striping of RAID 0 with the mirroring of RAID 1.
	www.computerhope.com /help/raid.htm (865 words)

	RAID levels (Site not responding. Last check: )
		RAID 0 is ideal for non-critical storage of data that have to be read/written at a high speed, e.g.
		RAID 1 offers excellent read speed and a write-speed that is comparable to that of a single disk.
		RAID 3 is not that common in prepress.
	www.prepressure.com /techno/raid.htm (907 words)

	Basic RAID Organizations
		A RAID 2 system would normally have as many data disks as the word size of the computer, typically 32.
		RAID 10 was not mentioned in the original 1988 article that defined RAID 1 through RAID 5.
		Under RAID 5, each attempted read of the failed drive can be performed only by reading all of the other disks.
	www.ecs.umass.edu /ece/koren/architecture/Raid/basicRAID.html (1884 words)

	FAQ About RAID
		The concept of RAID originated from a paper ("A case for Redundant Arrays of Inexpensive Disks" - 1987) published from the University of California at Berkley, proposing that using multiple small and rather inexpensive disks to replace the use of a single large disk to achieve fault-tolerant data redundancy.
		The parity data or disk is used to reconstruct data to a failed drive by comparing the data for the remaining drives in the array.
		Disk striping with several disks similar to RAID 0, but a small percentage of those disks were set aside to be "check disk," A special Hamming Error Correction Codes is implemented.
	www.recoverdata.com /raidfaq.htm (438 words)

	What is RAID (Redundant Array of Independent Disks)?
		RAID, which stands for Redundant Array of Independent (or inexpensive, depending on who you ask) Disks, is a category of disk drives which utilizes two or more hard drives in order to ensure that data is stored safely.
		RAID 4: This type is similar to RAID 0, with the exception that if there is a disk failure, the data from that drive can be recovered by a replacement disk that is created when a fault is found.
		RAID is used extensively throughout high end computers and in business computing environments; it is slowly finding ground in the home as prices continue to decrease.
	www.wisegeek.com /what-is-raid.htm (396 words)

	What is RAID? - A Word Definition From the Webopedia Computer Dictionary
		RAID disk drives are used frequently on servers but aren't generally necessary for personal computers.
		RAID allows you to store the same data redundantly (in multiple paces) in a balanced ay to improve overall performance.
		RAID, or Redundant Array of Independent (or Inexpensive) Disks, used to be the province of geeks and high-end IT departments.
	www.webopedia.com /TERM/R/RAID.html (944 words)

	Redundant Array of Independent Disks - RAID
		The RAID in the earlier history is also implemented by the software to enable the present abilities.
		The RAID system may have an altogether different drive for the sole purpose of replacing the drive that is failed or might have crashed.
		RAID server data recovery is one of the toughest and most challenging processes for any data recovery firm to undertake Read More...
	www.raid-data-recovery.net (990 words)

	RAID!
		RAID (Redundant Array of Inexpensive Disks) is a technique which uses multiple disks to store data.
		By storing the data on more than one disk, RAID is more fault tolerant than storing data on a single disk.
		One approach to RAID breaks data into blocks and stores these blocks on all but one of the disks.
	acm.uva.es /p/v5/509.html (529 words)

	Ars Technica: Skinny on RAID - Page 1 - (5/2000)
		So, if RAID was born forth from the desire for more speed and more data security over 12 years ago, it hasn't really taken the world by storm until recently, due to the fact that the third letter in *RAID* is finally becoming true: disks really are inexpensive.
		It is important to note that this config is not truly a valid RAID implementation because it's not fault-tolerant (and thus does not have the complementary overhead work).
		RAID 0 is a good entry-level to small environment alternative to dumping huge monies on fancier tech, especially in instances where I/O performance is more important than file redundancy.
	arstechnica.com /paedia/r/raid-1.html (984 words)

	The Tech Report - IDE RAID round-up - Page 1
		RAID arracy achieve redundancy by using some of the storage capacity provided by auxiliary drives for mirror or parity data that can be used to rebuild a RAID array in the event of a drive failure.
		RAID 10 is a striped set of mirrored arrays, while RAID 0+1 is a mirrored pair of striped arrays.
		RAID 10 and 0+1 arrays share the same storage capacity, and they're both sufficiently redundant to guard against a single drive failure, but after a single drive failure, RAID 0+1 is vulnerable.
	techreport.com /reviews/2002q4/ideraid/index.x?pg=1 (1904 words)

	Raid
		Although this offers the high performance of RAID 0 and redundancy, it is much more expensive and typically not seen except in environments where cost just doesn't matter.
		RAID 3 can give high performance in dedicated situations where large amounts of data need to be read quickly.
		RAID 5 is less expensive than mirroring (for equivalent storage), can provide very fast reads, particularly with more than 3 drives, and can survive a single drive failure.
	aplawrence.com /Unixart/raid.html (1179 words)

	RAID and Data Protection Solutions for Linux
		RAID, short for Redundant Array of Inexpensive Disks, is a method whereby information is spread across several disks, using techniques such as disk striping (RAID Level 0) and disk mirroring (RAID level 1) to achieve redundancy, lower latency and/or higher bandwidth for reading and/or writing, and recoverability from hard-disk crashes.
		RAID will not help you recover data lost in this way; to mitigate these kinds of losses, you need to perform regular backups (to archive media that aren't easily lost in a fire, stolen, or accidentally erased).
		Linux RAID devices cannot be dynamically resized, nor is it easy to move a RAID array from one set of drives to another.
	linas.org /linux/raid.html (4585 words)

	Combo RAID from Addonics
		Combining the flexibility of the Addonics Combo Hard Drive and the built in RAID function of the Serial ATA interface, the Addonics Combo RAID system is the most innovative RAID solution for building a high availability or a high performance storage system.
		Since the Combo RAID system is built on the Combo Hard Drive platform, you can use any of the hard drive as an external hard drive when it is removed from the computer.
		With RAID 1 setting, either hard drive can be hot swapped on the fly without any interruption to the system operation.
	www.addonics.com /products/external_hdd/combo_raid.asp (760 words)

	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.
	www.networkworld.com /details/728.html (828 words)

	RAID Server Data Recovery and Critical Server Data Salvaging Services Guide
		RAID 0 doesn't offer data redundancy and requires a minimum of two hard drives to be totally restored as a requirement for completing a successful RAID recovery.
		Although RAID 5 does stripe all available drives into a single large volume, space equal to one of its hard drives is used to store parity data.
		Total RAID capacity is calculated by subtracting the space of two drives from the sum of all the hard drives.
	www.salvagedata.com /raid-data-recovery (984 words)

	BBPC News \| BuildOrBuy - RAID Technology - Redundant Array of Independant Disks
		RAID can be achieved in one of 2 ways, either through hardware or software.
		RAID was previously known as Redundant Arrays of "Inexpensive" Disks.
		RAID installations are typically either RAID 0, 1 or RAID 5.
	www.buildorbuy.org /raid.html (1103 words)

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