Feeds

Toshiba looks ahead, sees a 14TB disk

Sifting through the bit pattern

Beginner's guide to SSL certificates

Comment Earlier this month Toshiba researchers presented a couple of papers concerning bit-patterned media (BPM) and associated head technologies at a Magnetism and Magnetic Materials Intermag conference in Washington DC. They have been working towards an areal density of 5Tbit/sq in for hard disk drives and this was by way of a progress report.

One paper with the somewhat lengthy title of "Fabrication of Ridge-and Groove Servo Pattern Consisting Self-Assembled Dots for High-Density Bit Pattern Media" discussed how bit-patterned media (BPM) composed of 1 bit size magnetic dots on a recording surface was made in a self-assembly process. This achieved a 2.5Tbit/sq in density and the dots were laid out in tracks along with servo signal patterns.

A second paper discussed advanced read/write head technology and was called "MR Ratio and RA Design of CCP-GMR Film for Over 2Tb/in2 Read Sensors."

Toshiba has extended its Nano Contact Magneto-Resistive (NCMR) head technology to enable ultra-high sensitivity with a nano magnetic domain wall. The paper described research simulation results and key specifications of CCP-GMR (Current Confined Path - Giant Magneto-Resistance) and the resistance range for 2-to-5 Tbit/sq in NCMR heads.

Toshiba's MK6465GSX 2.5-inch hard disk drive has an areal density of 528.5Gbit/sq in meaning 320GB per platter and 640GB in the 2-platter product. The BPM paper talks about 2.5Tbit/sq in, roughly five times denser. If it were applied to Toshiba's current 2.5-inch drive it would give us 1.6TB/platter and a 3.2TB product. Extrapolate that to the 3.5-inch format and the numbers are even larger.

For example, Seagate's Barracuda XT offers 2TB with four 500GB platters and a 347Gbit/sq in areal density, seven times less than the Toshiba researcher's 2.5Tbit/sq in. If the Barracuda used the Toshiba researcher's BPM then the resulting capacity would be 14TB. Toshiba has indicated it wants to enter the 3.5-inch drive market.

Such areal density improvement delights won't be appearing in products for several years. The hard disk drive industry might achieve a doubling of capacity every three years say, and that would deliver a 14TB 3.5-inch drive in 2018. You could plug in a different capacity doubling period to this algorithm and get a different year. Seagate reckons we have another two or three perpendicular magnetic recording (PMR) media generations ahead of us before we need to move to new technologies such as BPM though. ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
The cloud that goes puff: Seagate Central home NAS woes
4TB of home storage is great, until you wake up to a dead device
Azure TITSUP caused by INFINITE LOOP
Fat fingered geo-block kept Aussies in the dark
You think the CLOUD's insecure? It's BETTER than UK.GOV's DATA CENTRES
We don't even know where some of them ARE – Maude
Want to STUFF Facebook with blatant ADVERTISING? Fine! But you must PAY
Pony up or push off, Zuck tells social marketeers
Yahoo! blames! MONSTER! email! OUTAGE! on! CUT! CABLE! bungle!
Weekend woe for BT as telco struggles to restore service
Oi, Europe! Tell US feds to GTFO of our servers, say Microsoft and pals
By writing a really angry letter about how it's harming our cloud business, ta
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Internet Security Threat Report 2014
An overview and analysis of the year in global threat activity: identify, analyze, and provide commentary on emerging trends in the dynamic threat landscape.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.