Average BD disc = say 25GB.
Each GB has 1,073,741,824 bytes.
The BD disk is written in bits, so 1,073,741,824 * 8 = 8589934592.
Then times this by say 25 GB, = 214748364800.
That 214 Billion, 748 Million, 364 Thousand and 800 bits of information that you would need to view, record and somhow order into the structure of a disk.
This is the number of bits on the disc, which is exactly 25GB. And each pit on the disc would represent a bit, and then its in multiple layers of dye, which I would assume would be a pain in the ass to read unless you use a laser which had been designed for the very purpose. (A bd drive).
Im not sure how long it would take to record 1000 bits correctly, let alone this impossible number.