The number of different formats available in DVD drives can be confusing to anyone in the market for one. The list is much longer, but to address a few of the common formats, we have DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+RW, DVD-RAM ,DVD+R DL and DVD±RW. Wow! This list of common formats is long enough, no wonder it's confusing!
What's with all the Formats?!
The reason for various recordable DVD formats is that no one group owns the technology and different groups have chosen to support one technology over another. There is no industrial standard for manufacturers to reference, so for the time being consumers will have a few choices.
The first thing to address is DVD itself, which stands for Digital Versatile Disc. Some may argue that the V stands for Video, but with the capability to store video, audio, and data files, Versatile is definitely the keyword.
Start with the Basics
A DVD-ROM drive is the only one we will address that does not record. ROM stands for Read Only Memory, and refers to the typical drive that can merely read DVDs, as well as CDs (all DVD drives can read CDs). The Lite-On LTD-163-DO-R has attributes representative of your typical DVD-ROM drive, and features a maximum DVD read speed of 16x and a maximum CD read speed of 48x.
Before getting into the different recordable formats, let's address the basics of what the R and RW stand for, regardless of whether there is a + or ? in the middle. R stands for Recordable, which indicates that the disk may be recorded to only once. RW stands for ReWritable, which indicates that the disc may be recorded to more than once, and are generally rated for 1000 rewrites under good conditions.
The DVD-R/-RW format was developed by Pioneer, and was the first format compatible with stand alone DVD players. The group that promotes the technology calls itself the DVD Forum, which is "an international association of hardware manufacturers, software firms, content providers, and other users" with notable members such as Hitachi, Samsung, and Toshiba. The DVD-R/-RW format is based on CD-RW technology and uses a similar approach to burning discs.
The DVD+R/+RW format is a newer format, also based on CD-RW technology, and compatible with a large percentage of stand alone DVD players. The +R/+RW technology is not supported by the DVD Forum, and its main backing comes from a group called the DVD+RW Alliance. The Alliance "is a voluntary group of industry-leading personal computing manufacturers, optical storage and electronics manufacturers" with members such as Dell, Hewlett Packard, Sony, and Phillips Electronics.
The DVD-RAM format is based on PD-RW (Phase-Differential) drives, and actually uses a cartridge to hold the media (just like its PD-RW predecessor). Some DVD-RAM cartridges are double sided, making them ideal for companies to use as system backup, hence DVD-RAM is usually found only in commercial applications, and most end-users won't ever need to use or see this type of drive. The DVD-RAM standard is also supported by the DVD Forum just like the DVD-R/RW format. However, because of its use of a cartridge (limiting it's compatibility), and the scarcity and price of the media used, DVD-RAM is a distant third when compared to the DVD+R/+RW and DVD-R/?RW technology.
The +R/+RW and ?R/-RW formats are similar, and the main difference DVD+R technology has is the ability to record to multiple layers (with its new DVD+R DL format), where DVD-R can only record to one layer (not all +R drives are capable of dual layer burning, but no -R drives are). The Plextor PX-504U is an example of an external DVD+R/+RW drive capable of recording single layer discs in the +R/+RW format, but also able to read discs recorded by a DVD-R drive.
What is DVD±RW?
DVD±RW is not actually a separate format, but the designation given to drives capable of both ?R/?RW and +R/+RW operation. This type of drive is typically called a "Dual Drive" (not to be confused with a "Double Layer" drive) since it can write to both the +R/+RW and ?R/?RW formats. The Samsung TS-H552 is a DVD±RW drive capable of reading and writing every format discussed so far, and then some. It takes advantage of DVD+R DL (Double Layer) technology available with the +R format, allowing the appropriate media to store virtually double the 4.37 GB capacity of a typical single layer disc.
The other main thing to consider with DVD burners is selecting the correct media. Media for DVD-R, DVD-RW, DVD+R and DVD+RW media may all look the same, but they are slightly different in order to match the specific recording formats. The price of media for either format is generally the same, with RW media costing a good deal more than R media of either format. Double Layer media is even more expensive, and is the only way for an owner of DVD+R DL drive to take advantage of the tremendous capacity increase. As the amount of Double Layer drives increase in the market, the price of the DVD+R DL media is expected to fall with increased production of the media. DVD Burners (as these drive are often referred to) can be picky about the media supported, so be sure to choose your media wisely.
DVD in a Nutshell
DVD-ROM : Reads DVD discs
DVD+R : Writes to DVD+R media (will also typically write to CD-R and CD-RW media)
DVD+RW : Writes to DVD+RW media (will also typically write to DVD+R, CD-R and CD-RW media)
DVD+R DL : Writes to DVD+R DL (Double Layer) media (will also typically write to DVD+R, DVD+RW, CD-R and CD-RW media; many Double Layer drives are ALSO dual drives ? that is, able to write to BOTH +R/RW and ?R/RW media)
DVD-RAM : Writes to DVD-RAM cartridges (not in wide use on consumer market ? mainly a business format; can also read PD-RW discs. Will not usually be able to write to any other format including CD-R or CD-RW)
DVD-R : Writes to DVD-R media (will also typically write to CD-R and CD-RW media)
DVD-RW : Writes to DVD-RW media (will also typically write to DVD-R, CD-R and CD-RW media)
DVD±RW : Writes to DVD-RW and DVD+RW media (will also typically write to DVD-R, DVD+R, CD-R and CD-RW media; typically called "Dual Drives" since it can burn to two different DVD formats)
Final Words
This article took a look at the more common formats of DVD drives in order to shed some light on all the choices available. The differences between them all may be subtle, but the compatibility issues can be quite frustrating. The simple answer to anyone considering a drive is to forget about + and ? by themselves, and shoot for universal compatibility with a good DVD±RW with DVD+R DL support.
http://www.geeks.com/pix/techtips.htm
We all know what it is like when that message... Read More
There is two types of transformers in the market- linear... Read More
Nowadays, more and more monitor comes in with flyback transformers... Read More
As 2005 begins, there are a number of products on... Read More
The data on your hard drive is the most critical... Read More
Many people simply go to the retail store and get... Read More
It appears we need to further streamline health care and... Read More
It's most peoples worst computing nightmare. You wake up in... Read More
So you finally have that new laptop you have been... Read More
Much has been written about solid state disks (SSDs) becoming... Read More
We all know that computers change more then any other... Read More
Looking for a real bargain on laptop batteries? How do... Read More
If you have not seen the newest addition to the... Read More
Before you upgrade your PC hardware it's best to search... Read More
When comparing refurbished laptop models, ask about these specifications:Central Processing... Read More
Do You Feel Used by Computers?A look at second-user computer... Read More
We all know that we should back up our system... Read More
Hewlett-Packard is, along with Brother and Samsung, one of the... Read More
Should you buy an extended warranty with your laptop? You... Read More
Many small businesses have considered connecting computers and other devices... Read More
Who needs an LCD display? Well, if you're like me,... Read More
The gaming laptop is coming of age! It is steadily... Read More
This article focuses on frequently asked questions by buyers of... Read More
There are three refurbished laptop battery types, each named for... Read More
Brother is right up there with HP and Samsung as... Read More
Get ready everyone, home computers are about to set new... Read More
1) Mechanical: This is a type of computer mouse that... Read More
The following is a list of tips to help safeguard... Read More
Many technicians are confused on how to really read a... Read More
Nvidia has done it again, with it's newest video card,... Read More
IBM boasts a very large array of older and newer... Read More
Used laptop computers are everywhere these days. How can you... Read More
Have you ever come across power problem where once you... Read More
If you are tight on budget, go for Inkjet Printer.... Read More
As 2005 begins, there are a number of products on... Read More
Are you captivated by the stunning Case Mods you've seen... Read More
You can purchase an inkjet printer for as little as... Read More
Data loss is an expensive reality. It's a hard fact... Read More
Compatible Laser Toner CartridgesRecently, there has been a huge legal... Read More
When you're studying for your CCNA exams, you're going to... Read More
As the proud owner of a laptop computer, you'll want... Read More
What is so important about cables anyway?One of the most... Read More
Looking for a real bargain on laptop batteries? How do... Read More
Personal asset preventive maintenance software exists to help people manage... Read More
The Power Supply convert's your regular household current into low... Read More
Inkjet printers were born in the 1980s, replacing the popular... Read More
There are three refurbished laptop battery types, each named for... Read More
PC cooling systems are one of the hottest - and... Read More
It is the most annoying thing when one day you... Read More
It is true. You can save a lot of time... Read More
In today's age, building computers on yourself is often chosen... Read More
DVD CD ROMs have become predominantly the most used CD... Read More
Data Centers are the core of the Internet. The computer... Read More
This article focuses on frequently asked questions by buyers of... Read More
Think you got a great deal on a printer? Like... Read More
Ever wonder where all the cool gadgets come from? Ever... Read More
For Video cards - Most PC video cards these days... Read More
Computers and their accompanying printers were huge years ago. In... Read More
Hewlett-Packard is, along with Brother and Samsung, one of the... Read More
Soon the human brain will be completely interfaced with the... Read More
Human beings are scaling new heights day by day. Markets... Read More
RAID is short for Redundant Array of Independent (or Inexpensive)... Read More
Take a good look at your notebook computer screen. Do... Read More
With all the technical terms out there, it is becoming... Read More
Blu ray is a next generation optical media format developed... Read More
Even with the popularity of digital technology, and the availability... Read More
Computer Hardware |