What’s the future of mechanical hard drives? In short, it’s nothing more than writing on heads and platters to push up capacity and speed up transmission. The new breakthrough number of Seagate’s double read-write arm Mach.2 is second to none, while the disc technology is dominated by EAMR (Energy Auxiliary Magnetic Record), specifically, Seagate developed HAMR (thermal auxiliary magnetic recording) and the Western side is MAMR (microwave-assisted magnetic record).
Compared with HAMR requires new materials and hard disk structure design, the complexity is high, the cost is expensive, the reliability is unstable, MAMR is much simpler. Western Number had planned to produce an 18TB MAMR drive by the end of the year, but the plan changed.
According to Siva Sivaram, president of Western Digital Strategy Technology, the 18TB hard drive is actually used in a variant of MAMR technology, “EPMR (energy-enhanced PMR, energy-enhanced vertical magnetic recording). Western says they need to introduce the right technology at the right time, as does the 24TB and 30TB final technology route options.
EPMR is easier to deploy than MAMR because ITMR does not require a critical spin moment oscillator in MAMR technology.
Western stressed that the company’s large technology roadmap will not change, but only partial fine-tuning. It is reported that EPMR commercial’s first product will be ultrastar HC550 data center hard drive, up to 20TB capacity.
It is not known how EPMR will perform compared to SMR (stacked tile magnetic recording).