Feeds

Toshiba looks ahead, sees a 14TB disk

Sifting through the bit pattern

Internet Security Threat Report 2014

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. ®

Internet Security Threat Report 2014

More from The Register

next story
Docker's app containers are coming to Windows Server, says Microsoft
MS chases app deployment speeds already enjoyed by Linux devs
IBM storage revenues sink: 'We are disappointed,' says CEO
Time to put the storage biz up for sale?
'Hmm, why CAN'T I run a water pipe through that rack of media servers?'
Leaving Las Vegas for Armenia kludging and Dubai dune bashing
Facebook slurps 'paste sites' for STOLEN passwords, sprinkles on hash and salt
Zuck's ad empire DOESN'T see details in plain text. Phew!
Windows 10: Forget Cloudobile, put Security and Privacy First
But - dammit - It would be insane to say 'don't collect, because NSA'
Symantec backs out of Backup Exec: Plans to can appliance in Jan
Will still provide support to existing customers
VMware's tool to harden virtual networks: a spreadsheet
NSX security guide lands in intriguing format
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.