Ideally, you want data distributed across drives evenly and at an optimum size so that it can be efficiently accessed. When you create a striped set, chunks of data from the same file are distributed across the drives. (See File system formats available in Disk Utility.)Ĭlick the “Chunk size” pop-up menu, then choose a disk chunk size that you want used for all the disks.

Select the checkboxes of the disks you want to include in the set.įor each disk, click the pop-up menu in the Role column and choose “RAID slice” or “Spare” to designate the disk as a standard member or spare in the set, then click Next.Įnter a name for the RAID set in the RAID Name field.Ĭlick the Format pop-up menu, then choose a volume format that you want for all the disks in the set. If you need one large disk, but you have several smaller disks, you can create a concatenated disk set to use as one large disk. You can’t create a RAID set on your startup disk you must first start up your computer from another disk.Ĭoncatenated (JBOD) set: Increase storage space with a concatenated disk set. When you create a mirrored RAID set, your data is written to multiple disks so the information is stored redundantly. Mirrored (RAID 1) set: Protect your data against hardware failure with a mirrored RAID set. You can’t create a RAID set on your startup disk you must first start up your computer from another disk. Striped (RAID 0) set: A striped RAID set can speed up access to your data. In this mode, you can selectively recover thousands of files like the the screenshot below.In the Disk Utility app on your Mac, choose File > RAID Assistant. If you don't find your wanted data from the scanned results, there is a 'Deep Scan' option for you to let the program scan deep into your external drive and find more recoverable files. Select the folder where you want to save the recovered files. After selecting, you can just click 'Recover' button on top of the window. From there, you can just select the specific ones that you want to recover. Step 3: In this software, you have the option to preview all your files. After doing that, click the 'Start' button to proceed with the scanning process. Step 2: Select the external hard drive disk that you formatted or want to recover. From the main window of the program, choose the data types that you hope to recover. Step 1: After you've plugged your external hard drive into your computer, you then need to run Recoverit (IS) for Mac. 3.2 Recover MacBook Pro External Hard DriveĤ.2.6 Seagate Backup Plus External Hard Driveģ.2.1 Western Digital External Hard Drive.1.3 Recover Data from External Hard DriveĢ.1.2 Recover Files from External Hard Drive.1.1 Top External Hard Drive Recovery Software.

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