Chitchat Hard drives in the future will be made of glass

[dr.wailing]

Over the past few years, the rate of hard drive density improvements has dropped significantly. While Seagate and Western Digital have both pushed ahead with larger hard drives (often thanks to more platters and the use of helium), the actual rate of areal density increase has slowed these last few years. As Seagate and Western Digital push towards 20TB, glass substrates could be a critical component of that effort.

Right now, only laptop drives use glass substrates, which have several advantages over aluminum. First, glass is more rigid than aluminum, which allows the platters to be thinner (and lighter). Glass substrates are smoother and flatter than aluminum, which allows them to be packed together more tightly, and they expand less than aluminum under heat, which makes it easier to cope with thermal expansion. The amount of energy required to spin a glass platter at a given spindle speed will also be at least slightly lower than if the same platter was made of aluminum, due to the latter’s higher weight.

Click the following link to read the article in full: https://www.extremetech.com/computing/255048-20tb-hard-drives-made-glass-substrates

 

[俺操汝地娘]

Don't cry when your glass platter got shattered - say by dropping computer or laptop to floor.

Cry no use, just jump roof.

 

[johnny333]

What is more interesting is that the high capacity HDDs are using helium which is less dense than air.