How DNA Turns Into a Data Drive

Transcript

DNA data storage follows a simple three-step pipeline. First, a computer file becomes binary data. An encoder maps those bits into sequences using the four DNA bases, while adding addresses and error-correcting redundancy. The data is split into many short blocks, because very long DNA molecules are difficult to assemble. Next comes synthesis. A DNA synthesizer chemically builds each short, single-stranded molecule in the specified order. The molecules can be pooled together and preserved for long-term storage. To retrieve the file, the sample is prepared for sequencing. The sequencer produces many short reads, which may arrive out of order. Software groups them using their identifiers, compares repeated observations, corrects errors, and translates the bases back into bits. Those bits are reassembled into the original file. DNA storage is attractive for archival use because it is compact and durable, but writing and reading it require chemical synthesis, sequencing equipment, and computational decoding, making the process slower and costlier than conventional storage.