The storage war is going on fiercely, and the solid-state disk (SSD) has the upper hand with its super fast speed and falling price. Hard disk drives maintain an advantage in terms of price per gigabyte, and manufacturers strive to shift to a 10 chip design, and their capacity will become better. In the past few years, hard disk manufacturers have adopted new thermal assisted magnetic recording and shingled magnetic recording technology. Although the capacity has been greatly improved, the performance and reliability of hard disk manufacturers have fallen into disrepute and even got into legal trouble. < / P > < p > another way to increase storage density is to increase the number of disks per hard disk. Since Toshiba increased the number of disks per hard disk to nine, it has become the industry’s flagship hard disk standard. According to a report from storage newsletters, manufacturers are preparing to go one step further and jump to a design that encapsulates ten disks in a single hard disk. This has also been confirmed by market analysts at trendfocus, who recently said that HDD manufacturers have requested samples of new magnetic substrates less than 0.5mm thick. Manufacturers like Seagate are planning to limit the production of 20tb hard drives later this year on glass rather than aluminum. < / P > < p > in the end, hard disk manufacturers can cram up to 12 disks into a single hard disk. Trendfocus predicts that 24tb hard drives will be commercially available by 2022, but they are likely to use only 10 disks. At the same time, Seagate is providing very low volume of magnetic recording (eamr) and magnetic disks to assist in recording data. Apple extends AppleCare + purchase period: users can decide within 60 days