BD-R

Blu-ray Disc Recordable (or BD-R) refers to two direct to disc optical disc recording technologies that can be recorded on to an optical disc with an optical disc recorder. BD-R discs can be written to once, whereas BD-RE (Blu-ray Disc Recordable Erasable) can be erased and re-recorded multiple times. Disc capacities are 25 GB for single-layer discs, 50 GB for double-layer discs, 100 GB for triple-layer, and 128 GB for quadruple-layer (in BD-R only).

The minimum speed at which a Blu-ray Disc can be written is 36 megabits (4.5 megabytes) per second.

There are four versions of Blu-ray Disc Recordable Erasable (BD-RE) and three versions of Blu-ray Disc Recordable (BD-R). Each version includes three Parts (a.k.a. Books): Basic Format Specifications, File System Specifications, Audio Visual Basic Specifications. Each part has sub-versions (e.g. R2 Format Specification includes Part 3: Audio Visual Basic Specifications Ver.3.02, Part 2: File System Specifications Ver. 1.11, Part 1: Basic Format Specifications Ver. 1.3).

Note: Add extra time for disc verification phase and time for erasing the disc in the case of BD-RE.

As of July 2013^[update] (approximate pricing)

As of February 2014^[update] (approximate pricing)

As of February 2014^[update] (approximate pricing)

As of November 2016 (approximate pricing)

BD-R LTH is a write-once Blu-ray Disc format that features an organic dye recording layer. "Low To High" refers to the reflectivity changing from low to high during the burning process, which is the opposite of normal. The advantage of BD-R LTH is it can protect a manufacturer's investment in DVD-R/CD-R manufacturing equipment. The manufacturer need only modify current equipment; it need not invest in new production lines. This is expected to lower the cost of disc manufacturing.

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