Feeds

Hardware hacker proves Apple Fusion Drive works on older Macs

New role for OS X 10.7 Lion's CoreStorage logical volume manager

Secure remote control for conventional and virtual desktops

Top marks to hardware hacker Patrick Stein who has discovered that Apple’s Fusion Drive technology, which combines separate SSD and HDD storage into a single volume, can be added to old Macs. And he’s added one to his own Mac Pro.

Patrick’s test set-up included a 120GB SSD linked into the desktop’s internal Sata connector plus a 750GB hard drive hooked up externally by USB 2.0.

Apple Fusion Drive logo

Integrating the two proved to be simply a matter of then running command line code:

diskutil cs create bla disk1 disk7

‘disk1’ is the SSD, ‘disk7’ the USB-connected HDD.

Mac OS X unmounts the two drives, partitions them and maps them into a “Logical Volume Group”, which is the volume presented to the user as a single storage entity.

Of course, OS X knows that there’s a combination of drives in there and is able to install operating system and apps on the Flash drive, and data on the HDD.

Knowing this is all very well - what matters is that you can build your own Fusion Drive system using third-party parts for much less than Apple is going to charge you - it's a build-to-order option.

All this is part of Apple’s CoreStorage sub-system, a Logical Volume Manager, which was added to the OS with 2011’s 10.7 Lion release. It provides a modern volume manager capable of bypassing the limits of Apple’s long-in-the-tooth Hierarchical File System (HFS). Most other operating systems have had an LVM of their own for years, so Apple is playing catch-up here.

CoreStorage uses Logical Volume Groups (LVGs) to abstract various physical storage elements, disk images or AppleRAID sets all of which are mapped onto Logical Volumes (LVs), assigned to one or more Logical Volume Families (LVFs) and pooled in an LVG. It allows OS X to maintain a consistent filesystem image even when storage devices change.

Right now, Apple seems to be using this only to enable OS X’s FileVault 2 full-disk encryption and for Fusion Drive SSD-HDD combos, but there’s no reason why it can’t be extended to cloud storage, allowing a users’ local storage to be linked to integrated into iCloud. Likewise, a local drive can theoretically be extended with Nas storage.

CoreStorage is accessible through a new version of Apple’s Disk Utility app that will ship with the new machines that offer Fusion Drive as an option: the upcoming new iMac, for instance. But it’s presence in both Lion and 10.8 Mountain Lion means CoreStorage features are available through the command line tool diskutil.

You can the inside info on diskutil from its man page. ®

The essential guide to IT transformation

More from The Register

next story
So, Apple won't sell cheap kit? Prepare the iOS garden wall WRECKING BALL
It can throw the low cost race if it looks to the cloud
Samsung Gear S: Quick, LAUNCH IT – before Apple straps on iWatch
Full specs for wrist-mounted device here ... but who'll buy it?
Apple promises to lift Curse of the Drained iPhone 5 Battery
Have you tried turning it off and...? Never mind, here's a replacement
Now that's FIRE WIRE: HP recalls 6 MILLION burn-risk laptop cables
Right in the middle of Burning Mains Man week
HUGE iPAD? Maybe. HUGE ADVERTS? That's for SURE
Noo! Hand not big enough! Don't look at meee!
Intel unleashed octo-core speed demon for the power-crazed crowd
Haswell-E processors designed for gamers and workstation crowds
AMD unveils 'single purpose' graphics card for PC gamers and NO ONE else
Chip maker claims the Radeon R9 285 is 'best in its class'
Tim Cook in Applerexia fears: New MacBook THINNER THAN EVER
'Supply chain sources' give up the goss on new iLappy
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
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?