OS X El Capitan has an updated Disk Utility GUI and RAID has been removed for user safety purpose.
#Mac os disk utility raid el capitan how to
You can check disk information by typing in: diskutil list In this video I cover how to format internal and external hard drives, solid state drives, thumb drives, and SD cards with Disk Utility in Mac OS X 10.11 'El. Make sure that disk2Ĭorrespond to the disks that you have plugged in through the SATA to usb converter cable! Open OS X Terminal and use the command bellow instead of GUI Disk Utility: diskutil appleRAID create stripe Storage JHFS+ disk2 disk3Ĭopy and paste this command into terminal. Please note that the test data in the table above was conducted at "Save Apple Dollars" labs is subject to change and results may differ depending on the Hard Drive technology used in other systems. Increased throughput is the big benefit of RAID 0 versus spanned volume, at the cost of increased vulnerability to drive failures. The concurrent operations make the throughput of most read and write operations equal to the throughput of one disk multiplied by the number of disks. Striping distributes the contents of files roughly equally among all disks in the set, which makes concurrent read or write operations on the multiple disks almost inevitable and results in performance improvements. Thus, failure of one disk causes the loss of the entire RAID 0 volume, with reduced possibilities of data recovery when compared to a broken spanned volume. There is no added redundancy for handling disk failures, just as with a spanned volume.
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The capacity of a RAID 0 volume is the sum of the capacities of the disks in the set, the same as with a spanned volume. Apple removed the ability to manage RAIDs in their Disk Utility with the newest version of the Mac OS. By formatting the drive outside of the RAID process it will split the drives back into being essentially a JBOD (Just a Bunch Of Disks) This is likely due to being on Mac OS 10.11.x El Capitan. RAID 0 consists of striping, without mirroring or parity. Meaning Apple controlled the RAID with Disk Utility.
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RAID is a data storage virtualization technology that combines multiple physical disk drive components into a single logical unit for the purposes of data redundancy, performance improvement, or both. RAID stands for, redundant array of independent disks. Almost Double File Transfer Seed (Transfer 1GB File in 1 Second)