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DKT27

Future Hard Drives Will be Made of Glass

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DKT27    6,698
DKT27

6ukdrEe.jpg

 

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.

 

RUXbKDR.jpg

Mock-ups incorporating Hoya’s glass substrate. The right and left mock-ups use 10 0.5mm-thick glass substrates and nine 0.635mm-thick glass substrates, respectively.

A Japanese company, Hoya, believes that current HDD manufacturers will adopt its glass disks for 3.5-inch drives (glass is already used for 2.5-inch laptop drives). Hoya has prototyped glass platters that are 0.5mm and 0.381mm thick, compared with the 0.635mm platters currently in use. While each drive platter must have a gap between itself and the next platter, cutting the platter size by 40 percent means you can pack more platters into the same drive capacity. Glass substrates are also useful for HAMR (Heat-Assisted Magnetic Recording), which uses a laser to heat the part of the disk being written to. Seagate wants to introduce HAMR-equipped HDDs by 2018 and hit 20TB of available storage by 2020.

 

Banking on Capacity

 

One reason I suspect Nikkei is right about glass substrates being more widely adopted in 3.5-inch drives is because the hard drive industry really only has one card to play against SSDs — sheer storage capacity. The explosion in cloud services and the advent of so many comprehensive backup solutions means enterprise demand for back-end storage is going to continue to grow. Companies may use SSDs and NAND to cache data; we’ve even seen some interesting proposals for using NAND as a replacement for DRAM in cache servers. But while companies like Samsung sometimes make headlines for creating enormous NAND drives that dwarf anything hard drives can offer, they don’t bring those products to market for good reason: Nobody could afford them at the price they’d have to charge.

 

XyJOjRR.jpg

The last two blue dots show consumer capacity in 2011 and 2014. The red dot shows the density growth rate at 20TB in 2020, Seagate’s stated goal for its own HAMR introduction.

As the cost gap between hard drives and SSDs has fallen, we’ve seen SSDs muscling into what was traditionally the turf of higher capacity hard drives. The consumer market is clearly moving to NAND flash in the long run, with enthusiasts still buying some hard drives for local backups and archival purposes.

 

Long-term, however, HDDs are going to be seen as cold (or at least cool) storage options. That means driving up capacities is the most important way to expand their appeal, and the businesses that adopt them won’t be put off, even if glass platters require a higher cost. SSDs aren’t going to be cost-effective if you need 100 to 500TB of storage in the near-term. With the total amount of data created worldwide continuing to grow, there’s no sign of slowing the world demand for data any time soon.

 

:view:View: Original Article

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pc71520    1,067
pc71520
Quote

Future Hard Drives Will be Made of Glass

That's means...Transparency...:tooth:

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JimmySvert    184
JimmySvert

Don't know about u guys, but won't glass platters be more fragile? Won't read heads easily 'cause scratches or damage to it?

At first i thought the article was about HDDs that will be made the same way like in Minority Report movie (a tablet / plate of glass will be an HDD - i know it's still a piece of glass, but it's still enough hard, ain't it? :P).

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pc71520    1,067
pc71520
On 18/9/2017 at 0:36 PM, JimmySvert said:

won't glass platters be more fragile?

Must be something else...;)

Edited by pc71520

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BEngEE    59
BEngEE

yeah, don't drop kick one :P

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pc71520    1,067
pc71520
10 hours ago, BEngEE said:

yeah, don't drop kick one :P

:oops:it fell...:pos:

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Jogs    163
Jogs

They are not simple glass, but toughened glass, this makes them quite hard.

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DKT27    6,698
DKT27
23 hours ago, JimmySvert said:

Don't know about u guys, but won't glass platters be more fragile? Won't read heads easily 'cause scratches or damage to it?

At first i thought the article was about HDDs that will be made the same way like in Minority Report movie (a tablet / plate of glass will be an HDD - i know it's still a piece of glass, but it's still enough hard, ain't it? :P).

 

As jogs mentioned, the article says that one, it's already being used in laptop HDDs and two, the article says that it will be more tougher, smoother and better than aluminum - which the article suggests is being used currently.

 

Still, the scratches is very much an valid question, are they going to use a treated one which is found in phone's displays or just normal ones out there.

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JimmySvert    184
JimmySvert
40 minutes ago, DKT27 said:

 

As jogs mentioned, the article says that one, it's already being used in laptop HDDs and two, the article says that it will be more tougher, smoother and better than aluminum - which the article suggests is being used currently.

 

Still, the scratches is very much an valid question, are they going to use a treated one which is found in phone's displays or just normal ones out there.

 

hope glass will help with hdd durability & longevity too...

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Jogs    163
Jogs

If they use plexiglass then it will become virtually unbreakable although plexiglass may not work as its more of a plastic than real glass.

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pc71520    1,067
pc71520
On 19/9/2017 at 11:00 AM, Jogs said:

They are not simple glass, but toughened glass, this makes them quite hard.

I know...I was just joking. :tooth:

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