![]() OS X automatically defragments files less than 20 MBs in size, so unless you have a disk full of very large files there’s little need for defragmenting the hard drive except when trying to install Boot Camp on a fragmented drive. But you don’t need to buy third-party software. All you need is a spare external hard drive and Carbon Copy Cloner. ![]() You will have to backup your OS X partition to an external drive, boot from the external drive, use Disk Utility to repartition and reformat your hard drive back to a single volume, then restore your backup to the internal hard drive. You will use Carbon Copy Cloner to create the backup and to restore it.ġ. Get an empty external hard drive and clone your internal drive to theĤ. Restore the external clone to the internal hard drive.Ĭlone the internal drive to the external driveĢ. Select the Source volume from the left side dropdown menu.ģ. Select the Destination volume from the left side dropdown menu.Ĥ. Be sure the Block Copy button is not depressed or is ghosted.ĭestination means the external backup drive. Restart the computer and after the chime press and hold down the OPTION key until the boot manager appears. Select the icon for the external drive and click on the upward pointing arrow button.ġ. After DU loads select your internal hard drive (this is the entry with the Open Disk Utility in your Utilities folder.Ģ. Mfgr.’s ID and size) from the left side list. Note the SMART status of theĭrive in DU’s status area. If it does not say ‘Verified’ then the drive isįailing or has failed and will need replacing. Otherwise, click on the Partition tab in theģ. (Journaled.) Click on the Options button, set the partition scheme to Under the Volume Scheme heading set the number of partitions from theĭrop down menu to one.
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