THE WHATIS.COM WORD-OF-THE-DAY June 10, 2002 X (compact disc access time) ______________ TODAY'S SPONSOR: The .tv Corporation
Save 30% on Web addresses! Not only will you get a great deal on your Web addresses, but you'll also get superior customer service, innovative products and services and a place that is easy to register and manage your Web addresses. Great names are still available. Register the names you want before someone else does! Check it out now: http://WhatIs.com/r/0,,3808,00.htm?the.tvcorporation ______________ TODAY'S WORD: X (compact disc access time) See our definition with hyperlinks and table at http://whatis.techtarget.com/definition/0,,sid9_gci214118,00.html In compact disc (CD) and digital versatile disc (DVD) technology, X is a base multiplier that expresses the time it took to read data from the compact disc in its original version, which was 150 kilobytes (KB) per second. As successively faster CDs arrived, they adopted the convention of indicating the read time in terms of the original speed. Thus, a 2X CD had a read access time of 300 KB and so forth. Our table relates each common drive speed to its read access time. It also shows the range of revolutions per minute (RPM) used to make the read access time possible. CD/DVD Maximum Data RPMs Drive Speed Transfer Rate (revolutions per minute) 1X CD-ROM 150 KB/sec 200 - 530 2X CD-ROM 300 KB/sec 400 - 1060 4X CD-ROM 600 KB/sec 800 - 2120 8X - 12X CD-ROM 1.2 MB/sec 1600 - 4240 24X - 50X 1.8 - 6 MB/sec 2400 - 6360 (approximately) 1X DVD-ROM 1.25 MB/sec No exact data, but much slower than 1X CD-ROM There are only minor increases in speed as one moves from the 24X, 32X, and 40X drives. The high rotation speeds produced can create noise and vibrations, and performance may vary from drive to drive. It seems unlikely, because of these vibrations and performance variations, that speeds will increase much above present levels. Even though a hard drive can reach much faster speeds of rotation, its enclosure stabilizes the entire mechanism and therefore avoids much of the noise and vibration inherent in the open CD-ROM drive. RELATED TERMS: compact disc http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci507072,00.html digital versatile disc http://whatis.techtarget.com/definition/0,,sid9_gci213923,00.html ______________________ WHATIS DISCUSSION FORUM | Challenge #2 THE SCENARIO: Company Beta held a meeting to inform employees that they would begin monitoring employee e-mail. Management says it's their duty to prevent improper use of e-mail. Employees are concerned that monitoring e-mail will change the culture of the company. Who's right? You be the judge! http://whatis.discussions.techtarget.com/WebX?[EMAIL PROTECTED]^5@.1dcf9e64/63!viewtype= ______________________ QUIZ #27 | Security awareness for end users Studies show that a company's biggest security threat is its own employees. The SANS Institute recommends that organizations should take time to educate their employees about computer security and periodically test employees to make sure they understand the basics. To help you in your efforts to raise security awareness in your organization, we've created the following quiz: http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci826572,00.html _________________________________________________________ LESS THAN 2 WEEKS UNTIL OUR FREE SECURITY DECISIONS EVENT Time's running out to attend Security Decisions June 19-21 at the Hilton Chicago Hotel. There are still seats left but you should act now or risk being shut out. FREE attendance available at: http://www.securityconf.com/html/registration.htm Benefit from top strategies to make the most cost-effective security purchases, expert tactics to close specific security holes in your system, and the most effective ways to manage network security (without breaking the bank). Apply today! ______________________________ RECENT ADDITIONS AND UPDATES [1] subset symbol http://whatis.techtarget.com/definition/0,,sid9_gci831748,00.html [2] gap analysis http://whatis.techtarget.com/definition/0,,sid9_gci831294,00.html [3] XSD http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci831325,00.html [4] PersonalJava http://searchsolaris.techtarget.com/sDefinition/0,,sid12_gci831420,00.html [5] Resilient Packet Ring http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci754865,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Assistant Editor ([EMAIL PROTECTED]) ___________________________________________________________________ :::::::::::::::::::: ABOUT THIS NEWSLETTER ::::::::::::::::::::: Created by TechTarget (http://www.techtarget.com) TechTarget - The Most Targeted IT Media Copyright 2002, All Rights Reserved. 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