6
This content is rated TV-MA, and is for viewers 18 years or older. Are you of age?
Sorry, you are not old enough to view this content.

Tech Culture: Build a RAID with Disk Utility

About Video Transcript

Tech Culture: Build a RAID with Disk Utility

2:51 /

If you have a Mac and some spare hard drives lying around, you can find out how to build your own either superfast or super-resilient RAID using Disk Utility.

>> Wilson: So you saw Brian Cooley's Insider Secret on building your own Raid Array [assumed spelling] out of an old computer and some spare internal hard drives but you say, hey, I'm too lazy and too cheap to take apart a computer to do all that. Well, I've got an Insider Secret on how you can do nearly the same thing with a Mac and some random external drives. ^M00:00:16 [ Music ] ^M00:00:25 >> Wilson: We've all got some external spare hard drives laying around that your geek friends bought you for Christmas, you can even use spare USB drive sticks, but keep in mind one thing, your Raid Array will only be as large as the smallest drive you have attached to it so if you pair up a 1G USB stick with a 250G hard drive you've just wasted 249 Gigabytes. So, first things first, attach your drives into whatever port you want it doesn't matter it could be Firewire, USB, [inaudible] or any combination Mac OS10 doesn't care. Next, start up Disk Utility, you'll find this in the Utility folder of your applications folder, select the drives on the left side panel and a tab labeled Raid will appear in the main panel, select that. Here you can configure a Raid Array, give it a catchy name then select the file system type, Mac OS Extended Journal is just fine. There are several kinds of Raids but Mac OS10 offers 3 choices, a mirrored array automatically backs up one drive to another bit for bit, they're no speedier than [inaudible] and you lose half your storage but you can be sure that your data's safe. The second kind is striped; striped arrays take half the data and put it on one drive and the other half the data and put it on the other drive at the same time. It has much faster read and write performance than a single hard drive but if one drive fails you, you lose all your data. Finally, the [inaudible] Disk Set option is available if you want to combine a mirrored array with a striped array for faster drive speeds and backed up data at the same time. So drag both your disks or any number of disks from the left panel over into the Raid Section, be sure to drag the disk and not the partition, which is right underneath the disk. Under Options you can select Raid Block Size, if you deal with a bunch of big files then go with a larger block size, if you've got a database or a bunch of Word documents small block sizes are totally fine, they'll get faster seat times but slower speed. Finally, I like to leave the automatically built Raid Mirror Sets option on, occasionally power will fluctuate on a single drive and cause it not to perfectly mirror the data. In this case, Disk Utility will automatically rebuild the drive for you, hit Create and you're ready to go. A couple of notes, this is a software based Raid, meaning it will suck up CPU cycles as it puts together the data for you but I told it was cheap. Second of all, as cool as Disk Utility is it will not tell you when a disk has failed on a Raid Array so check periodically if a drive has killed itself. I'm Wilson Tang and this has been an Insider Secret. ^M00:02:46 [ Music ]

New releases

How the Samsung Galaxy Note got its pen in CNET UK podcast 412
20:16 November 27, 2014
The Samsung Galaxy Note almost came with a toothpick, we're going back to Jurassic World, and BT has its sights on O2 -- or maybe...
Play video
Apple looks to Virtual Reality
4:55 November 26, 2014
Apple is pursuing virtual reality harder than it ever has before. The iPhone 6 can play 4K video, and the best Black Friday deals for...
Play video
Olympus E-PL7's mainstream appeal
2:24 November 26, 2014
A good interchangeable-lens series for budding enthusiasts gets better.
Play video
Tomorrow Daily 093: Underwater cities, MST3K's new website, robot security guards and more
23:17 November 26, 2014
On today's show, we discuss a Japanese design firm's plans for a futuristic underwater city, the newest way to watch your favorite...
Play video
Sparing no expense, 'Jurassic World' features Gear smartwatch
2:56 November 26, 2014
Samsung products find a way into the latest "Jurassic Park" movie, Amazon launches Local Services, and Twitter tests coupon offers...
Play video
Tablet tips for traveling with kids
2:47 November 26, 2014
Learn how to use the tech you already have to entertain your kids during a long trip.
Play video
Razor scooters drive electric
1:54 November 26, 2014
Razor's small E100 and larger E300 electric scooters make for a fun ride, but don't expect much in the way of features.
Play video
A time machine for your kitchen? We take it for a test drive
1:57 November 26, 2014
The "Tim3 Machin3" makes one-pot meals a cinch -- no flux capacitor necessary.
Play video