SMR is a new hard drive recording technology. In the simplest terms, Shingled Magnetic Recording (SMR) is a new hard drive technology that allows the tracks on a platter to be layered on top of each other, just like roof shingles on a house, to increase platter density or tracks per inch (TPI). As with helium-filled drives, SMR technology allows for higher capacity on hard drives than traditional storage methods.
With SMR, it’s easy to see where the writer width isn’t a problem, and how a more narrow read head can benefit capacity over time so that capacity gains are only limited by the ability to shrink the reader and grain sizes.
The reader and writer elements of today’s perpendicular magnetic recording HDDs have reached a physical limitation. Without future recording technologies, they cannot become smaller, nor can the tracks they read and write.
SMR also achieves higher areal densities by squeezing tracks closer together. Tracks overlap one another, like shingles on a roof, allowing more data to be written to the same space. As new data is written, the drive tracks are trimmed, or shingled. Because the reader element on the drive head is smaller than the writer, all data can still be read off the trimmed track without compromise to data integrity or reliability. In addition, traditional reader and writer elements can be used for SMR. This does not require significant new production capital to be used in a product, and will enable SMR-enabled HDDs to help keep costs low.
Here another information about this SMR hard drive.
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