Each "layer" (a thin polycarbonate disc) holds around 9.4 GB[1] of information, and the wafers are stacked in layers of 20, 25, 100, or more, giving a substantially larger overall data capacity; for example, 100× cartridges could hold 940 GB using the system as announced.
Hitachi Maxell announced the creation of the SVOD standard in 2006, intending to launch it the next year.
It is possible that they in fact developed this "second generation" SVOD for use with standard Blu-ray lasers, with each thin disc having a storage capacity of 25 GB, or a 100-disc cartridge having a storage of 5 TB.
[2] Hitachi Maxell developed systems both for burning to the media using standard DVD optical heads, and pre-recording to the media using a special heat imprint technique they called "nanoimprinting."
[4][2] In 2007, Japanese broadcaster NHK announced a similar system, based on Blu-ray discs, of stacked optical storage media specifically designed to rotate at high speeds, up to 15,000 RPM.