THE WHATIS.COM WORD-OF-THE-DAY May 28, 2004 RAID
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Apply now and the $1495 registration fee will be waived: http://smartcrmconference.techtarget.com/html/registration.htm?track=NL-34&ad=483891 ______________________ TODAY'S WORD: RAID Read our complete definition with hyperlinks at http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci214332,00.html?track=NL-34&ad=483891 RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O operations can overlap in a balanced way, improving performance. Since multiple disks increases the mean time between failure (MTBF), storing data redundantly also increases fault-tolerance. A RAID appears to the operating system to be a single logical hard disk. RAID employs the technique of striping, which involves partitioning each drive's storage space into units ranging from a sector (512 bytes) up to several megabytes. The stripes of all the disks are interleaved and addressed in order. In a single-user system where large records, such as medical or other scientific images, are stored, the stripes are typically set up to be small (perhaps 512 bytes) so that a single record spans all disks and can be accessed quickly by reading all disks at the same time. In a multi-user system, better performance requires establishing a stripe wide enough to hold the typical or maximum size record. This allows overlapped disk I/O across drives. There are at least nine types of RAID plus a non-redundant array (RAID-0). See our complete definition for a list of RAID types: http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci214332,00.html?track=NL-34&ad=483891 ______________________ RELATED TERMS: hard disk http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci212227,00.html?track=NL-34&ad=483891 operating system http://whatis.techtarget.com/definition/0,,sid9_gci212714,00.html?track=NL-34&ad=483891 ______________________ SELECTED LINKS: SearchStorage.com has put together "The essential RAID primer." http://searchstorage.techtarget.com/originalContent/0,289142,sid5_gci939868,00.html?track=NL-34&ad=483891 SearchStorage.com has a Best Web Link category for more information about RAID. http://searchstorage.techtarget.com/bestWebLinks/0,289521,sid5_tax420,00.html?track=NL-34&ad=483891 _____________________ TODAY'S TECH NEWS: GRID 'EARLY ADOPTERS' TO REAP MAJOR BENEFITS Grid computing will take a giant leap in acceptance within the next few years as better technology ups productivity and reduces costs. http://search390.techtarget.com/originalContent/0,289142,sid10_gci967366,00.html?track=NL-34&ad=483891 RELATIONAL DBMS MARKET REBOUNDS Find out who won the annual Gartner Research DBMS survery, and what Linux is doing for Oracle. http://searchdatabase.techtarget.com/originalContent/0,289142,sid13_gci967432,00.html?track=NL-34&ad=483891 BIG BLUE'S GRID STRATEGY CLARIFIED AT GT'O4 IBM says that grid computing is delivering business value in many industries today, despite the obstacles that some companies face when it comes to deploying the technology. http://search390.techtarget.com/originalContent/0,289142,sid10_gci967455,00.html?track=NL-34&ad=483891 >> Catch up on all the latest IT news at http://searchtechtarget.techtarget.com?track=NL-34&ad=483891 ______________________ SECRET WORD-OF-THE-DAY | What is IT? The abbreviation for this legislation sounds like footware; it regulates what types of records companies can store and for how long. Do you think you know the Secret Word? Click to see if you're right! http://searchcio.techtarget.com/gDefinition/0,294236,sid19_gci920030,00.html?track=NL-34&ad=483891&Offer=ciofact ______________________ GEEK TRIVIA | Because you're smarter than the average bear What famous keystroke combination was invented by IBM engineer David Bradley? http://searchwin2000.techtarget.com/sDefinition/0,,sid1_gci947105,00.html?track=NL-34&ad=483891&Offer=ciofact ______________________ INTRODUCING: SearchSmallBizIT.com SearchSmallBizIT.com is a Web resource for IT professionals working in companies with 50 to 1,000 employees. The site provides comprehensive advice on how to perform the wide range of tasks that are expected of IT pros in smaller companies. These include everything from contract negotiation and skills development to the details of setting up a wireless network. Unlike other small business computing sites, which have a strong news orientation, TechTarget's newest site stresses hands-on advice as well as news. It relies on our network of more than 120 technical experts as well as our strong user community to build tutorials and provide step-by-step instructions that IT professionals need to become proficient in new areas quickly. >> Stop by and visit SearchSmallBizIT today! http://searchsmallbizit.com?track=NL-34&ad=483891 ______________________________ RECENT ADDITIONS AND UPDATES (1) storage at the edge http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci965712,00.html?track=NL-34&ad=483891 (2) depository http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci964710,00.html?track=NL-34&ad=483891 (3) zettabyte http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci963097,00.html?track=NL-34&ad=483891 (4) gray http://whatis.techtarget.com/definition/0,,sid9_gci548160,00.html?track=NL-34&ad=483891 (5) Minix http://searchenterpriselinux.techtarget.com/sDefinition/0,,sid39_gci884703,00.html?track=NL-34&ad=483891 ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: MARGARET ROUSE, Site Editor ([EMAIL PROTECTED]) IVY WIGMORE, Consulting Editor ([EMAIL PROTECTED]) LOWELL THING, Consulting Editor and Founder ([EMAIL PROTECTED]) GABRIELLE DERUSSY, Advertising ([EMAIL PROTECTED]) ::::::::::::::::::::: ABOUT THIS NEWSLETTER :::::::::::::::::::::: This e-newsletter is published by WhatIs.com, a targeted Web site from TechTarget, the most targeted IT media and events company. 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