Western Digital mentioned on the OCP World Summit final week that greater than half of 2023 information middle arduous drives will use Shingled Magnetic Recording (SMR) know-how. At the moment, Western Digital is the one supplier of SMR HDDs managed by hosts. The know-how is supported by , software program and functions.
SMR know-how to extend the capability of arduous drives comparatively simply, however at the price of some efficiency issues because of the read-modify-write cycle launched by twisted tracks. As information middle operators are concerned about maximizing their storage capability, they have a tendency to spend money on software program that may cut back the specifics of SMR. A couple of years after the launch of Western Digital's first host-managed SMR arduous drives, increasingly more firms are adopting them. At the moment, the overwhelming majority of arduous drives within the information middle are based mostly on vertical magnetic recording know-how, however WD claims that SMR arduous drives will depart behind PMR drives in 4 years' time.
In fact, utilizing SMR shouldn’t be the one option to improve the capability of arduous drives. Power-assisted PMR applied sciences (eg MAMR, HAMR, and so forth.) are additionally utilized by Western Digital. Within the coming quarters, the corporate intends to launch 16MB (ePMR) and 18TB (eSMR) capability MAMR-based arduous drives. The corporate additionally plans to introduce 20TB arduous drives by 2020.
In line with Western Digital, high-capacity arduous drives won’t get replaced by high-capacity SSDs within the close to future. HDDs proceed to value quite a bit much less on TB than SSDs. Due to this fact, in 2023 they’re used to retailer 6.5 occasions extra information than information middle SSDs.