What’s your experience with RAID?ĭo you have any horror stories or difficulties utilizing the technology? We want to hear from you in the comments.This version of OS X El Capitan is for users running OS X Snow Leopard or OS X Lion who would like to upgrade to macOS High Sierra. Make certain the data is no longer needed or backed up before proceeding. Note: Breaking the RAID array can and most likely will render the data on the disk useless and unrecoverable. Execute the following command from Terminal to delete the RAID array and split the disks back to their previous standalone format ( Figure E). Identify the RAID volume’s disk ID and make a note of it.Ģ. Once it’s done, rerun the command from step 1 to verify the newly created RAID volume ( Figure D).ġ. To select RAID 1 (Backup), execute the command below ( Figure C).ĭiskutil appleRAID create mirror Backup JHFS+ diskID1 diskID2ģ. RAID1 does slow down performance at the cost of the redundancy.
If one drive dies, the remaining drive will continue to function without loss of data.
Data is written to both drives at the same time so each drive has a valid copy of the data stored.
To select RAID 0 (Storage), execute the command below ( Figure B).ĭiskutil appleRAID create stripe Storage JHFS+ diskID1 diskID2īy contrast, a mirrored array (RAID 1) features fault tolerance by design. RAID 0 offers no fault tolerance, so when one disk dies the data is lost - be sure to keep backups aplenty. A striped array (RAID 0) is developed for performance since it combines two or more disks into one virtual one and the data is written across the drives simultaneously, speeding up the read/write times. Making a note of the disk IDs for which disks will be part of the array, next run you’ll need to decide which type of RAID array to build: Striped (Storage) or Mirrored (Backup). Launch Terminal and execute the following command to obtain the disk IDs since we will need those to complete the build process ( Figure A).Ģ. SEE: OS X El Capitan: The smart person’s guide Building a RAID arrayġ. However, RAID support is still alive and well in Terminal. The next SQL Server: Interview with Asad Khan of MicrosoftĮl Capitan’s redesign of Disk Utility changed everything, including the removal of RAID volume management through the GUI. How to set, change, and recover your MySQL root password How to create a virtual machine in Google Cloud Platform Up until El Capitan, RAID volume creation was as simple as selecting the tab in Disk Utility and a few clicks later, your RAID or concatenated volume would be ready.ĭata warehouse services: What to consider before choosing a vendor RAID management in OS X has existed throughout multiple iterations of the popular Mac OS. Learn the commands necessary to build and destroy RAID volumes in El Capitan. If Apple's elimination of RAID volumes from the retooled Disk Utility has got you down, fret not.
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