Data Bases • Custom Term Papers • Free Term Papers • Free Research Papers • Free Essays • Free Book Reports • Plagiarism? Links • Top 100 Term Paper Sites • Top 25 Essay Sites • Top 50 Essay Sites • Search 97,000 Papers @ DirectEssays.com • Search 101,000 Papers @ ExampleEssays.com • Search 90,000 Papers @ MegaEssays.com Free Essays • Term Paper Sites • Chuck III's Free Essays • Free College Essays • TermPaperSites.com • My Term Papers • Get Free Essays • Essay World • Planet Papers	Search Lots of Essays Back to Subjects - Computers RAID TECHNOLOGY RAID TECHNOLOGY RAID technology is a fault tolerance for avoiding hard disk failure for the Windows NT server. RAID standing for Redundant Array of Inexpensive Disks is part of Windows NT and doesn’t require additional software. There are three levels in which RAID works levels 0, 1, and 5. There are levels 2, 3, and 4 but the server does not utilize them. RAID level 0 is called a stripe set, which means that your data is written over many disks opposed to one. This means that the data you have to save gets partitioned over several disks to enlarge hard disk performance. The RAID will allow you to save a large amount of data quicker by taking the amount of disks you have and dividing the amount of information evenly over the disks at the same time. This does not have fault tolerance and is only used if you want to increase your hard disk performance, which means if your partition fails on any disk you lose all the information. RAID level 1 is a different story, this provides mirror set. Mirror set means that you have two hard disks that mirror each other, meaning that if you save information on one disk it is saved on the other disk. This allows for no network downtime if one of them isn’t working, because the other one will process the data needed. This level also provides the best hard disk performance and makes your cost only two hard disks as to multi-disks in level 0. The one disadvantage to this is that if you have two drives at 1 gigabyte instead of two gigabytes you only utilize one gigabyte. RAID level 5 is similar to level 0 in that it also saves in a stripe set. Level 5 though also saves the parity information across the disks. This parity gives Windows NT server fault-tolerance protection. If one disk fails the system can rebuild it using the parity information. This is more efficient in your hard space but will slow up the network if one disk fails because the system has to rebuild the information. This can cause the network some strain on requests and memory. Read operation will be slower, because it requires three times as much memory due to the parity calculations. This level requires a minimum of 16-bytes of RAM to work and is generally used for large networks. RAID offers options for the network administrator to make the most of his/her network. RAID level 0 is best for very small networks, level 1 makes good for LAN’s , and level 5 provides good protection for WAN’s . If working in Windows NT this information is valuable to stop problems over the network and make it as efficient as it can be. This information was provided by http://www.elementkjournals.com/zdnetpit/ewn50014.htm Bibliography: Word Count: 473
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