HGST Working With Helium To Inflate Hard Drive Capacities

Subject: Storage | September 19, 2012 - 11:27 AM |
Tagged: western digital, WD, patter density, hitachi, hgst, helium, Hard Drive, 6tb

Western Digital-owned Hitachi Global Storage (HGST) recently announced that it is pursuing the mass production of helium-filled hard drives. The culmination of six-plus years of research and development, Hitachi’s engineers have come up with a workable solution to craft a sealed enclosure to contain the helium and internal drive hardware over the long term and in a way that can be mass produced. While the company is not ready to talk specifics or announce individual products, HGST (Western Digital) is going on record in stating that its helium-filled “hard drive platform” will offer up performance, power efficiency, and capacity improvements in a 3.5" form factor (with up to seven platters) sometime in 2013.

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Don't try this at home folks, it won't actually work :).

The current crop of hard drives have small holes on the top to allow air pressure equalization, as the drives are not a fully-sealed design (and is why dunking them in oil is a bad idea). The proposed helium-filled hard drives would change that design, by being fully sealed from the outside environment after being filled with the noble gas. Steve Campbell, CTO at HGST stated the following in the company's press release:

 “The benefits of operating a HDD with helium fill have been known for a long time. The breakthrough is in the product and process design, which seals the helium inside the HDD enclosure cost effectively in high-volume manufacturing,”

But why exactly is helium better for hard drives? In short, the gas is one-seventh (1/7) as dense as the air around us. This reduction in density allows for the platters to spin faster, or at the same spindle speeds at today's drives while experiencing less resistance and turbulance from versus an air-filled hard drive. Thanks to the reduced drag force, Hitachi can pack the platters closer together, which means that it can place more platters into the 3.5" hard drive form factor than ever before – up to seven with the current design. Further, the motor does not have to work as hard to drive the platters which results in quieter operation and more power savings. HGST also claims that using helium allows for better thermal conductivity, and allows the helium-filled hard drives to run up to 4°C cooler than an equivalently-configured air-equalized drive. Granted, 4°C is not that much of an improvement when looking at a single drive (or even a few in a desktop system), but it can add up to some decent cooling savings when these drives are utilized in datacenters.

Hitachi Global Storage does not yet have any specific products to announce publicly, but the company did offer up a few performance numbers that certainly seem promising – an in line with the company's goal of reducing the "total cost of ownership," or TCO. In addition tot he temperature improvements, the company claims up to 23% power reduction versus air. And when HGST factors in its seven-platter design, they have managed to bring the Watts-per-Terabyte (W/TB) 45% versus current drives. Assuming the helium-aided hard drives use the same (or more) amount of platter area as the company's previous drives, Hitachi/Western Digital could offer up to 7TB hard drives when combined with the company's 1TB per platter areal density improvements.

It has the potential to get even better, however. Should the engineers be able to integrate Heat Assisted Magnetic Recording (HAMR) – similar to what Seagate is pursuing – helium hard drives could offer up approximately 85TB 3.5" drives thanks to the additional two platters. Previously, Seagate envisioned up to 60TB HAMR hard drives in the 3.5" form factor. Those numbers are fairly far off in the future (and theoretical), however. On the other hand, Seagate believes that 6TB HAMR hard drives are reasonably close to public consumption, and if a HAMR drive could also benefit from the extra platters, potential spindle speed improvements, and power savings of using helium, I think 8TB+ is not out of the question while using less power than a traditional air-equalized (not sealed) 6TB HAMR-equipped hard drive.

Extremetech does bring up an interestng point about pricing, though. Mainly that helium is much more expensive than simply using the air around us! And as it is used up, it will only get more expensive, which are likely costs that will be passed onto consumers. Fortunately, it should not be too much of a premium that customers would have to pay (over a traditional hard drive) because a 3.5" hard drive will need only a small amount of the helium gas to realize the benefits, according to PC Perspective's resident storage guru Allyn Malventano.

What do you think about the prospects of a heluim-filled hard drive? Will we see such devices within our lifetimes, and just how much will these things cost? I suppose we'll have to wait until next year to find out!

Source: HGST

September 19, 2012 | 12:25 PM - Posted by gloomfrost

Wow interesting concept. I wonder if making a low speed low platter drive with this system could extend drive life into the Decades (double digit years). I want longevity over performance, for storage anyways.

September 19, 2012 | 01:53 PM - Posted by Tim Verry

Hmm, well if they keep the drive at the same spindle speed as current drives, the internals will likely experience less wear over the same amount of time. I imagine they could use this to extend drive life, htough it's hard to say by how much.

September 19, 2012 | 12:29 PM - Posted by Anonymous (not verified)

can't wait!!!!!!!!!

September 19, 2012 | 01:39 PM - Posted by YTECH (not verified)

Question; How will HGST overcome the current issue with limited resources of Helium and the increased cost of Helium?
HGST may have to resort to the use of Nitrogen.

September 19, 2012 | 01:54 PM - Posted by Tim Verry

Yes, that may be an issue in the future, though hopefully we've just moved to flash storage by the time the cost of helium becomes too prohibative for hard drive companies to use it and be profitable :).

September 19, 2012 | 05:07 PM - Posted by JSL

...except Nitrogen is NOT an inert gas. Nitrogen reacts in some form or fashion with most metals - especially lithium; it will cause it to physically ignite. It is almost as dense as Oxygen (atomic mass difference of 1.9927 less than O). The benefits, as stated from using Helium, would no longer exist.

September 19, 2012 | 01:45 PM - Posted by mtrush (not verified)

use a vacuum instead void if air? what would be the thermal interface? i don't know.

September 19, 2012 | 05:11 PM - Posted by JSL

There would be no thermal interference (but would be a problem for heat dissipation as heat doesnt transfer in a vaccuum), and it would be much harder to maintain a vacuum over time. It's not as hard to keep something pressurized or contained.

September 20, 2012 | 02:38 PM - Posted by Anonymous (not verified)

In a vacuum, How are the read/write heads going to float over the platter with no fluid (AIR) to ride on!

September 19, 2012 | 01:58 PM - Posted by Anonymous (not verified)

I feel sorry for the data recovery people; if this takes off perhaps they'll constantly have high pitched voices.

September 19, 2012 | 05:20 PM - Posted by Anonymous (not verified)

we don't have a helium problem

September 20, 2012 | 01:11 AM - Posted by JSL


Actually there is.

September 20, 2012 | 11:13 AM - Posted by Anonymous (not verified)

there is no helium shortage. All helium on Earth is a product of radioactive decay within the Earth's crust. The helium accumulates in the same places for the same reasons that natural gas does, and is pumped out of the ground along with the natural gas. As long as stuff keeps decaying in the crust and we keep pumping natural gas out of the ground, we won't run out of helium.

What there is is lack of production systems. The US dumped a crap load on the market which essentially drove producers out of the market. Now that its starting to be scarce you will see producers start to process, store and sell it at more reasonable pricing.

September 20, 2012 | 12:24 AM - Posted by elel (not verified)

The concern I'd have is that helium has a reputation as a 'slippery' gas. That is, its atom size is so small that it can go through most systems meant to contain it, given enough time. I wonder how long the drives are able to keep going before the helium in them is no longer pure enough to sustain the drive's operation? Maybe they have a slower fallback mode if the drive develops a leak in one of its seals?

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