Comment Re:I have tons of questions on this... (Score 1) 118
Doesn't make any sense.
1) The first paper you linked to was entitled "5D Data Storage by Ultrafast Laser Nanostructuring in Glass" published in 2013 - not the same title as the one referred to by the article: "5D Data Storage by Ultrafast Laser Writing in Glass" due to be published tomorrow (2016).
2) The second paper you linked to mentions a pitch of "up to" 150 nm but was published in 2006.
3) Using the 150 nm pitch figure from the 2006 paper:
25400000 nm per inch / 150 nm pitch = 170000 dots per inch per layer
170000 dots per inch per layer * 3 layers = 510000 dots per inch
510000 dots per inch * 3 bits per dot = 1530000 bits per inch
(1530000 bits per inch)^2 = 2.3 Tb per square inch
2.3 Tb per square inch / 8 bits per byte = 293 GB per square inch
So only twice the density of the latest 10TB HDDs (140 GB per square inch)
3) According to the phys.org article linked in the summary: "The file is written in three layers of nanostructured dots separated by five micrometres (one millionth of a metre)."
25400 um per inch / 5 um pitch = 5000 dots per inch per layer
5000 dots per inch per layer * 3 layers = 15000 dots per inch
15000 dots per inch * 3 bits per dot = 45000 bits per inch
(45000 bits per inch)^2 = 2 Gb per square inch
2 Gb per square inch / 8 bits per byte = 250 MB per square inch
So only 0.0018 times the density of the latest 10TB HDDs (140 GB per square inch)
4) 200kHz laser pulses would give:
200 kb per second / 8 bits per byte = 25 kB per second
360TB claimed data storage / 25 kB per second = 14400000000 seconds
14400000000 seconds / 32 Million seconds per year = 450 years
So 450 years to read or write the disk.