What is the future of mechanical hard disk? In short, it is nothing more than making an article on the magnetic head and disk to push up the capacity and speed up the transmission speed.
The magnetic head is second to none in the number of Seagate’s dual read-write arm mach. 2. In terms of disk technology, eamr (energy assisted magnetic recording) is the main focus. Specifically, Seagate’s research and development is HAMR (thermal assisted magnetic recording), and the western side is mamr (microwave assisted magnetic recording).
Compared with HAMR, which requires new materials and hard disk structure design, it has high complexity, expensive cost and unstable reliability, while mamr is much simpler. Western Digital had planned to sample 18tb mamr hard disk at the end of the year, but the plan has changed.
According to Siva sivaram, President of Western Digital strategic technology, this 18tb hard disk actually applies the variant of mamr technology “epmr (energy enhanced PMR)”. Western Digital said that they need to introduce the right technology at the right time, and so does the final technology route choice of 24tb and 30tb.
Epmr is easier to deploy than mamr because epmr does not require the key spin moment oscillator in mamr technology.
Western Digital stressed that the company’s large technology roadmap will not change, but only local fine-tuning. It is reported that the first commercial product of epmr will be ultrastar hc550 data center hard disk, with a maximum capacity of 20tb.
I don’t know the final performance of epmr compared with SMR (laminated magnetic recording).