Subject: Storage | April 8, 2014 - 11:22 PM | Tim Verry
Tagged: Seagate, sata 6Gbs, SAS, Hard Drive, enterprise, 6tb
Seagate's latest enterprise class hard drive offers up to 6TB of space in a 3.5" form factor. The Enterprise Capacity series drive comes in both SATA III 6Gbps and 12Gbps SAS interfaces. Seagate was able to achieve an impressive 1,000 Gb/inch or about 1.25 TB per platter with the drive's five total platters adding up to the 6TB capacity. Perhaps even more impressively, Seagate was able to offer up a 6TB, five platter, 7,200 RPM drive without using helium.
The 6TB Enterprise Capacity hard drive comes with a 128MB DRAM cache. It is rated at 216 MB/s for sequential transfer speeds and an average latency of 4.16 milliseconds. The drive also supports 256-bit AES encryption and an instant secure erase function which overwrites data multiple times. Seagate further claims the drive is rated for 24/7 workloads at 550TB/year with a MTBF of 1.4 million hours. The drive comes with a five year warranty.
The drive will come in several variants depending on the storage interface. LaCie has already committed to using the new drives in its dual bay external storage products. Seagate has not released pricing on the new 6TB drive, but stated that it would price the drive at the same $/GB as last year's 4TB model. Expect the price to be around $650 MSRP before contract and bulk order deals.
It is a neat drive for sure, and I hope that the technology trickles down to the consumer space quickly, as 4TB has been the maximum single drive capacity for far too long!
For now, the drive will be used in the datacenter, production house, and security/surveillance markets (particularly in the datacenter market where rack space is at a premium).
Subject: Storage | September 19, 2012 - 11:27 AM | Tim Verry
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.
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!
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