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[PConline News] With the development of SSD, HDD seems to have become a product of the previous era, but the rising price of NAND flash memory has made SSD not popularized in the past few years. High prices are always the pain points of SSDs. Therefore, how to lower the price ratio is the breakthrough that HDD manufacturing giants always wanted to seize.
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At present, the mainstream disk uses PMR perpendicular magnetic recording. The current PMR storage density is approaching the limit, and it can only achieve a single disk capacity of 1.5TB, even though Seagate, Western Digital, and HGST have used SMR tile-type magnetic recording technology. Improve storage density, but it can only increase storage density by 25%. The introduction of 14TB hard disks in the existing technology seems to be the limit.
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However, the current situation seems to have made breakthrough progress. Recently, the well-known storage service provider Backblaze reported that Mark Re, CTO (CTO) of Seagate, said that HAMR (Heat-Assisted Magnetic Recording) storage technology has become more and more commercially available.
The capacity density in October of this year is still 2Tbpsi (Caps. per square inch). Mark Re revealed that it has reached 5Tbpsi, which is 3.8 times the current Seagate's largest 12TB hard disk (PMR) 1.3Tbpsi, and HAMR's final design goal is 10Tbpsi. .
In addition, Western Digital announced the MAMR “microwave-assisted magnetic recording” hard disk drive. The difference from HAMR is that it uses microwaves instead of lasers in HAMR as an auxiliary medium. It was shipped in 2019 and claimed to have a density of 4Tb.
Seagate re-emphasized the time node, trial production and display of 16TB HAMR hard disk in 2018, large-scale production of 20TB mechanical hard disk in 2019, increase capacity to over 40TB in 2023, and 100TB in 2030.
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