DNA Molecular Data Storage System HelixVault: 1 Gram of DNA Stores 215 PB of Data with Over 1,000-Year Preservation

DNA Molecular Data Storage System HelixVault: 1 Gram of DNA Stores 215 PB of Data with Over 1,000-Year Preservation

Global data volumes are growing at 25% annually, while traditional storage media—hard drives, tape, SSDs—have seen their density improvement rates significantly slow. The HelixVault system, developed jointly by Microsoft Research and synthetic biology company Twist Bioscience, attempts to solve this contradiction using nature's oldest information carrier: DNA.

How It Works

HelixVault converts digital files into DNA base sequences (A, T, G, C corresponding to binary 00, 01, 10, 11), then writes the sequences into synthetic DNA fragments using Twist Bioscience's high-throughput DNA synthesis technology. Reading is performed using nanopore sequencers to restore base sequences to digital information.

The system's core innovation lies in error-correction coding. Both DNA synthesis and sequencing can introduce errors—base substitutions, insertions, or deletions. Microsoft Research senior researcher Karin Strauss revealed that the team developed an error-correction code called "HelixCode" that adds 15% redundant bases to each information block, enabling the system to perfectly recover original data even with single-base error rates as high as 5%.

Performance Metrics

HelixVault achieves storage density of 215 petabytes per gram of DNA, equivalent to approximately 430,000 5TB hard drives. Write speed is 4 KB per second (limited by DNA synthesis speed), and read speed is 150 MB per second (limited by sequencing speed). Write cost is currently approximately $8,000 per GB, with read cost at $50 per GB.

"Write cost is the biggest bottleneck," Strauss admitted. "But DNA synthesis costs are declining faster than semiconductor manufacturing. We expect write costs to fall below $10 per GB by 2035."

Preservation is another major advantage of DNA storage. Under cold, dry conditions, DNA's theoretical preservation lifespan exceeds 1,000 years—a Copenhagen research team once extracted usable DNA from 2-million-year-old Greenland permafrost. By comparison, hard drives typically last 5 years and tape lasts 30 years.

First Users

Norway became HelixVault's first official user, storing a copy of the National Library's digital archive in DNA form at the Svalbard permafrost facility. "This is an insurance policy," said National Library director Aslak Sira Myhre. "Even if all electronic devices fail, as long as someone can sequence DNA, this knowledge won't be lost."

The US National Center for Biotechnology Information (NCBI) is evaluating HelixVault for storing its 30 PB genomic database backup.

Technical Challenges

The system's greatest technical challenge is random access. Unlike hard drives that can instantly locate any data block, DNA storage requires retrieving target sequences from large pools of mixed DNA fragments, currently achievable only through PCR amplification—slow and consumptive of samples. The Microsoft team is developing a CRISPR-based targeted retrieval approach, aiming to reduce random access times from hours to minutes.

HelixVault's open-source SDK is available on GitHub. Microsoft expects to launch an enterprise managed storage service in 2032.