Double Your Storage with Dual-Layer DVDs

By · Monday, April 19th, 2010

USDM Dual Layer DVD DiscsRecordable DVD discs hold a lot of information, but what do you do when 4.7GB just isn’t enough? Extended length projects such as a video lecture series or movie can easily run over two hours in length. Splitting the project on two separate discs is one option, however this is not always cost effective. Fortunately, dual-layer recordable DVDs are a great solution.

With 8.5GB of space, a dual layer DVD features almost twice the storage capacity of a regular DVD. Dual-layer discs are available in both DVD+R and DVD-R formats, depending on your needs. These discs make it possible to store up to 4 hours of DVD quality video on a single disc!

This means that you don’t have to add a second disc to your project, or upgrade from single to double DVD cases, or pay a slightly higher shipping cost for each unit. When you get right down to it, dual-layer discs can save you a bundle!

To understand how a dual-layer DVD works, one must first understand how a regular DVD-R/DVD+R disc works. A DVD disc is made up of an organic dye layer sandwiched between two pieces of polycarbonate plastic. The plastic protects the dye layer and gives the DVD its strength, while the dye contains the stored information as a series of pits and grooves. This is similar to how a vinyl record works, but because DVDs use a laser instead of a needle, the pits and grooves are packed in much more densely than a record.

A double layer DVD works on the same principles as a single layer disc, but contains an additional dye layer on the same side of the disc. The information is written to the first layer like normal, then the laser changes its focus by moving up or down. From there, it can continue writing information to the second layer.

There will always be a slight pause with dual-layer discs because of how the DVD hardware works. This is also why some store-bought movies contain a warning about a short pause on the packaging – it is because they are dual-layer discs.

The majority of DVD burners and players on the market today fully support dual-layer DVD-R and DVD+R discs. In rare cases, older players may have trouble reading the discs and some very old burners may not be able to record them. Most DVD authoring software packages also support creating dual-layer discs.

The one downside to dual-layer discs is that they have been priced slightly higher than their single-layer counterparts in the past. It’s just the price you pay for the extra storage space and convenience. However, a new line of blank dual layer DVDs from CDROM2GO aims to change that.

They carry a large selection of recordable DVD media that’s cheap in price, but not cheap in quality. That’s because CDROM2GO carries discs by Grade A manufacturers including Taiyo Yuden, Mitsui, Verbatim, and US Digital Media. They buy in bulk to get the best prices and then pass the savings on directly to you!

Check out their full selection of blank DVD+R dual layer discs and DVD-R DL discs to start enjoying the benefits of extra storage space today!


By James Greene on April 22nd, 2010 at 7:27 am

How do I know which dual-layer dvd to get? DVD+R or DVD-R. Thank you.

DVD+R discs use a different tracking system for reading data than DVD-R, one that is supposedly less susceptible to read errors. Another difference is that DVD+R has better error correction than DVD-R, which again helps discs play back smoothly.

However, DVD-R discs are inexpensive and available almost everywhere, whereas DVD+R discs are slightly more expensive and not quite as easy to come by in some markets.