Optical Disk Storage Options
Dual Layer DVD-RW
Dual Layer DVDs allow DVDs to store a large amount more data than traditional single-layer discs, up to 8.5 GB per disc. When played back, especially with video files, Dual Layer DVDs often show a slight delay or transitional pause between the two layers – this is normal, especially with older DVD players.
BD-R and BD-RE
‘BD-R’ stands for Blu-Ray Disc Record able and ‘BD-RE’ stands for Blu-Ray Disc Record able Re Writable. These types of Blu-Ray disc can be recorded on using an optical disc recorder, BD-RE as many times as needed and BD-R only once. These discs have similar specifications to regular Blu-Ray discs, coming in single-layer format with 25 GB of storage, or dual-layer with 50 GB of storage. Triple and quadruple layer discs have also been produced in BD-R format, allowing up to 128 GB of storage. Depending on drive speeds, standard 50 GB discs can take anywhere between 190 minutes and 12 minutes to fully write, and are priced fairly reasonably, making them a popular and cost-effective data storage option, especially for high-definition video and audio files.
Different types of optical disk are more suitable for different data storage needs, and so this should be considered accordingly when comparing different options. Cost, data storage, type of file to be stored and availability should all be kept in mind when considering the variations between these types of optical disc storage.
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