Hitachi demonstrated a 4 Layers Blu Ray disc

Hitachi demonstrated reading from a 100 GB Blu Ray disc, comprising four layers of data. It is probably in reaction to the upcoming adoption of triple layer HD-DVD. The good news is that this technology seems close at hand: the device used to read is very close to the LG GBW-H10N that we tested. A firmware modification was all it took to allow all four layers to be read.