March 22, Seagate demonstrated at the Open Compute Computing Summit The world's fastest mechanical hard disk.
The redesigned HDD is actually based on a very simple principle, that is, 'heavy people pick up firewood high flame'. Two driver arms (Mach.2 technology) are introduced, each motor arm has 8 heads, and operates independently after power on.
Compared to the traditional single-motor 8-disc, 16-drive, dual-motor arm means that it can transfer/retrieve data twice as much, that is, double the read/write performance (similar to Raid 0).
Take the demonstration disk as an example. Its continuous data transfer speed has reached 480MB/s, which is more than 7200rpm, and the SATA3 hard disk limit (235MB/s) doubles directly. Even with the highest 15K (15,000 rpm), it is 60% faster.
At the same time, Seagate also showed another muscle, announced another key unit of the HDD 'disk surface' technology, HAMR (heat-assisted magnetic recording) reached the industrial standard.
HAMR is Seagate's solution to increase storage density by using a special laser near the Curie point temperature (138°C, the temperature at which the magnetic material permanently loses magnetism) to heat the magnetic storage media (instantaneously over 400°C), thereby reducing the write Coercivity when entering data.
Seagate has manufactured a 20TB HAMR drive with a density of 2Tb per square inch (no current PMR/SMR exceeds 1.5Tb).
In terms of reliability, HAMR hard disk head life has reached 6000 hours (equivalent to record 3.2PB data) , is 20 times the current industry standard.
Even more forceful is that Seagate is preparing to introduce HAMR and Mach.2 technology at the same time as the Exos enterprise-class product line. However, the specific listing date is unknown. According to previous comments, the second half of 2019 will be the fastest.
