The abstract of the report “Towards practical, high-capacity, low-maintenance information storage in synthesized DNA“:
This challenge has focused some interest on DNA as an attractive
target for information storage because of its capacity for high-
density information encoding, longevity under easily achieved
conditions and proven track record as an information bearer.
[…]We encoded computer files totalling 739 kilobytes of hard-disk storage and with
an estimated Shannon information10 of 5.2x10^6 bits into a DNA
code, synthesized this DNA, sequenced it and reconstructed the
original files with 100% accuracy.
The article is behind the paywall, but Gizmodo writes the the results published:
[…] they can store 2.2 petabytes of information in a single gram of DNA, and recover it with 100 percent accuracy.
Original title and link: Petabyte Reliable DNA Storage ( ©myNoSQL)