Microsoft has refined its long-term data storage technology, Project Silica, to utilize readily available borosilicate glass – the same material found in common Pyrex cookware – capable of preserving data for over 10,000 years. The advancement, detailed in a recent paper published in the journal Nature, addresses the inherent limitations of current archival storage methods like magnetic tape and hard disks, which are susceptible to degradation and require periodic data migration.
Previously, Project Silica relied on a specialized type of fused glass, suitable for research but impractical for widespread adoption. The shift to borosilicate glass significantly lowers the barrier to commercialization, according to Microsoft. The system encodes data by using a femtosecond laser to create tiny deformations, known as voxels, within the glass. These voxels represent bits of data, arranged in layers just 2 millimeters thick.
“It has incredible durability and incredible longevity. So once the data is safely inside the glass, it’s good for a really long time,” said Richard Black, the research director of Project Silica, according to reporting from The Guardian.
The latest iteration of Project Silica also incorporates improvements in the data writing process. Microsoft researchers have moved beyond encoding data based on the polarization of the glass to a method utilizing “phase voxels,” which leverages phase changes within the material. This new approach allows for more efficient and parallel writing of data. The company has streamlined the writing process for polarization voxels, reducing it to a pair of laser pulses.
Machine learning algorithms have also been applied to optimize symbol encodings and predict data aging within the glass, enhancing the reliability and longevity of the stored information. This addresses the issue of “bit rot,” the gradual decay of data integrity that affects traditional storage media like hard drives and optical discs.
Microsoft has demonstrated the technology’s capabilities by archiving content such as movies and music onto the glass, showcasing its potential for preserving cultural and historical artifacts. However, the company has not yet announced a timeline for the commercial deployment of Project Silica. In a blog post, Microsoft stated it will “consider learnings” from its research.
The long-term viability of the technology hinges not only on the durability of the storage medium but also on the ability of future generations to access and interpret the data. As noted by GovTech, the question remains whether the technology will avoid the fate of earlier archival formats, such as the Zip drive, becoming obsolete due to a lack of compatible readers.
