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DVD jukebox technology appeals to CD users. (Tape/Disk/Optical Storage).

Information technology has dramatically altered the demand for data storage and enhanced its value to the workplace. Desktop, department, and enterprise environments have all evolved to the point where data that was once viewed as a static resource is now viewed as a mission critical company asset.

The emergence of key enabling technologies that fuel global competition have significantly impacted the market for mass information storage. These developments can be credited with opening up and accelerating the opportunities within the optical disc storage segment of the mass storage market. More specifically, these opportunities include record-once and rewriteable CD and DVD DVD: see digital versatile disc.
 in full digital video disc or digital versatile disc

Type of optical disc. The DVD represents the second generation of compact-disc (CD) technology.
 technologies housed within jukebox A storage device for multiple sets of CD-ROMs, DVDs, tape cartridges or disk modules. Using carousels, robot arms and other methods, a jukebox physically moves the storage medium from its assigned location to an optical or magnetic station for reading and writing.  storage devices.

CD-R (CD-Recordable) A writable CD technology using a type of compact disc that can be recorded, but not erased (CD-Rs are "write once" discs). CD-R discs are used to master CD-ROMs, to back up data and to make copies of data for distribution.  (recordable) and CD-RW (CD-ReWritable) The only rewritable CD technology. CD-RW disks look like other CD media, but with close inspection, they have a more polished surface with a very dark blue-gray cast.  (rewritable) technologies have been integrated into automated jukeboxes, allowing data access to and from banks of media using multiple drives within the same physical unit. CD-R and CD-RW media could be easily created and then accessed, stored in disc slots within magazines for later access, or exported from the jukebox to be read by CDROM See CD-ROM.  drives or simply archived to another location. CD-R and CD-RW technologies in jukeboxes provide companies with the ultimate industry-standard gigabyte storage solution.

With the introduction of recordable and rewritable DVD technologies including rewriteable DVD-RAM A rewritable DVD disc endorsed by the DVD Forum. Using phase change technology, DVD-RAMs are like removable hard disks, and the media can be rewritten 100,000 times compared to 1,000 times for DVD-RW and DVD+RW. The first DVD-RAM drives with a capacity of 2.6GB (single sided) or 5. , recordable DVD-R (DVD-Recordable) A write-once (read only) DVD disc for both movies and data endorsed by the DVD Forum. DVD-Rs are often called "DVD Dash Rs" or "DVD Minus Rs" to distinguish them from the competing "Plus R" format (see DVD+R).  or DVD+R (DVD+Recordable) A write-once (read only) version of the DVD+RW optical disc from the DVD+RW Alliance. DVD+Rs hold up to 4.7GB of data per side and can be read by DVD-Video players and computer DVD-ROM drives. A DVD+R DL disc is a "dual layer" DVD+R that holds a total of 8.5GB. , and rewriteable DVD-RW (DVD-Read Write) A rewritable (re-recordable) DVD disc for both movies and data from the DVD Forum. Also called "DVD Dash RW" and "DVD Minus RW," DVD-RW uses phase change recording. The media hold 4.7GB per side and can be rewritten 1,000 times.  and DVD+RW (DVD+Read Write) A rewritable (re-recordable) DVD disc for both movies and data from the DVD+RW Alliance. DVD+RW media can be read on DVD-Video players and computer DVD-ROM drives. , 4.7GB and 9.4GB disc capacities are realized, and a new terabyte storage solution has appeared. This capacity increase represented more than 7 and 14 times the storage capacity of a 650MB CD-R and CD-RW, respectively. Initially, DVD recording jukeboxes were not able to record CDs, which made it difficult for users to replace their CD jukeboxes A CD player that holds multiple audio CDs. The term may also refer to a CD-ROM jukebox. See CD-ROM server and digital jukebox. , and the first-to-market DVD technology called DVD-RAM could not be exported and read in standard DYD-ROM drives. Jukebox vendors used both CD and DVD drives DVD drives come in a variety of speeds and options. The original drive (1x) transferred data at 1.35MB per second. By doubling the spindle speed (RPMs) for 2x drives, the transfer rate increased to 2.7MB/sec and has been increasing ever since.  within the same unit to accommodate CD write functionality along with DVD writing capability. Software application vendors were forced to supply complicated drivers to handle the insertion of a CD into a CD drive and insert a DVD into a DVD drive. Today, despite the fact that there are still multiple writable DVD See DVD-R, DVD-RAM, DVD-RW and DVD+RW.  formats, most DVD jukeboxes See jukebox and digital media server.  include drives t hat can write and rewrite DVD media that can be read in most DVD drives, as well as write and rewrite CD based media. An added benefit is that software vendors have produced reliable and automated disc-handling software. By allowing recordable and rewritable DVD jukeboxes to support both reading and writing of DYDs and CDs we have effectively replaced the need for a CD-R- and CD-RW-only jukebox.

There are other market reasons for why writable DVD jukeboxes can replace writable CD jukeboxes. A number of broad interrelated in·ter·re·late  
tr. & intr.v. in·ter·re·lat·ed, in·ter·re·lat·ing, in·ter·re·lates
To place in or come into mutual relationship.

 factors can be identified that are shaping information requirements The information needed to support a business or other activity. Systems analysts turn information requirements (the what and when) into functional specifications (the how) of an information system.  and the way businesses want to use data. Within each of these emerging markets, DVD jukeboxes are playing a critical role in satisfying these needs and it is simple enough to say that DYD DYD Don't You Dare  offers higher capacity and faster access times while retaining the ability to read and write CDs and read them in standard CD- or DVD-ROM DVD-ROM: see digital versatile disc.

A read-only DVD disc used to permanently store data files. DVD-ROM discs are widely used to distribute large software applications that exceed the capacity of a CD-ROM disc.

Growth of the Internet and intranets: The explosion in Internet and intranet use by businesses is supporting the creation of vast amounts of information and multimedia content. The need to have online or near-line access to this information and media is becoming a mission-critical activity for the modem enterprise.

Data warehousing See data warehouse.

data warehousing - data warehouse
 and mining: Data collection and the ability to manipulate and analyze that data has become a valuable commodity in itself and an important dimension. Mass storage devices that facilitate access to such databases form an integral part of any storage strategy.

Multimedia content and applications: The creation of new media forms has dramatically increased the need for storage solutions to accommodate the growing sizes of applications and data files. Broadcasting, entertainment and publishing are all examples of industries undergoing rapid change with respect to types of media and how it is being stored for purposes of production and distribution.

Migration to digital medium: Digital technologies are quickly becoming the standard not only for traditional information storage but as the media of choice for audio, visual, and network-based industries as well. The quality, integrity, and reproductive accuracy made possible by these digital standards face few obstacles to widespread use other than being affordable. DVD storage devices, and, in particular, jukebox devices represent an important enabling technology.

Declining storage costs: The emergence of affordable DVD drives and new, low-cost DVD recording techniques have made DVD disc creation inexpensive and the opportunity to own such systems available to a very sizeable market. As accessibility to DVD technologies becomes available to more market segments, businesses that require such technology will grow, further fueling the market opportunity for DVD storage devices.

Faster access to greater amounts of data: This is the most compelling force driving the demand for DYD storage devices. As enterprises cope with greater amounts of information, the ability to store, retrieve, and disseminate data becomes a critical factor in the execution of daily tasks and long-term strategic planning Strategic planning is an organization's process of defining its strategy, or direction, and making decisions on allocating its resources to pursue this strategy, including its capital and people. .

The key benefits of using DVD jukebox storage are the following:

* Managing data across not only local and department levels, but also the divisional and corporate levels;

* Handling the vast quantities of data entered and being generated by the organization

* Performance of the storage and processing devices relative to the needs of the users and cost-per-megabyte

* Reliability of media and drives as well as jukebox solution

* Data integrity of the media Organizations can rely on DVD jukeboxes. in order to satisfy their information storage needs. DVD jukeboxes are deployed in varying configurations today. From a single drive, 100-disc jukebox, to a 28drive, 1,000-disc jukebox. The nature of the information to be stored and the life cycle of the information typically drive the selection of a storage device. At certain stages in its life cycle, information is subject to different usage patterns. DYD can accommodate such life cycle usage as it uses rewritable media for frequently changing information and write once media for archived data. Thus, the combination of reusability, longevity, stability, and remove-ability makes it a comprehensive data storage solution.

As the demand for data storage grows, more and more organizations are turning to DVD as their storage solution. Along with increased acceptance, DVD jukebox and software products are adapting to meet the data storage needs of many organizations. This combination of growth and change is providing customers with greater benefits while the changes taking place to adopt DVD technology is a natural migration from the CD.
Figure 1

Comparison of CD and DVD media technologies

                           CD-R   CD-RW   DVD-R     DVD-RAM    DVD-RW
                                          DVD+R                DVD+RW

Capacity                   650MB  650MB  4.7GB SS  4.7GB SS,  4.7GB SS
                                                   9.4GB DS

Record Once                 Yes    No      Yes        No         No

Rewritable                  No     Yes      No        Yes       Yes

Record Speed                40x    12x   2x/2.4x      2x      1x-2.4x

Read compatible with        Yes    Yes      No        No         No
CD-ROM and CD players *

Read compatible With
DVD-ROM and DVD players *   Yes    Yes     Yes        No        Yes

Maxell media                Yes    Yes     Yes        Yes       Yes


* Media must be formatted using OSTA's Universal Disc Format (UDF) or
ISO9660 format. Compatibility is subject to media and drive vendor tests
and does not represent the author's test results.

* Record speeds are the maximum speeds at the time of this writing and
reflect the current generation of media only. DVD-R/+R and DVD-RW/+RW
media is single-sided since one side of the disc can be labeled similar
to CD-R/-RW. DVD-RM media can be single-sided bare media or double-sided
cartridge media.

Rich D'Ambrise is senior engineering manager at Maxell Corp. of America (Newark, NJ.)
COPYRIGHT 2002 West World Productions, Inc.
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Author:D'Ambrise, Rich
Publication:Computer Technology Review
Article Type:Industry Overview
Geographic Code:1USA
Date:Oct 1, 2002
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