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- #Mac os disk utility cannot load disk how to#
- #Mac os disk utility cannot load disk mac os#
- #Mac os disk utility cannot load disk mac#
Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. Not sure what version you are using? Click here to determine your version of macOS. This article applies to the following versions of macOS: The following is not an exhaustive list of error messages, so you may not find your specific error here. When the setup is done, you should see the screen below, and your RAID will be available for you to use.This article covers some of the common error messages and questions you might encounter while using Disk Utility. This involves reformatting and partitions your disks and creating the RAID.
#Mac os disk utility cannot load disk mac#
You’ll see a screen like the one below as your Mac goes to work configuring your RAID. Double-check your properties, then click Next.Once you click Next, your Mac will start to configure your RAID array, so don’t click it until you are ready. If you don’t, you rebuild the RAID using the Disk Utility app. If you are building a RAID 1, you’ll see an option to “Automatically rebuild.” This means that if a drive is removed and then replaced, the data will automatically be restored to the new drive.If you are a more general purpose user who does email, writes, or works in spreadsheets or databases, choose 32K or 64K. If you work with large files, like with video or 3D graphics, choose 128K or 256K. Chuck size determines the size of those pieces. Chunk size: Since data is written across drives, it is broken into pieces.
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Capacity: This is based on the drives you selected in the previous step.Type: This is what you selected back at the beginning of the procedure.
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#Mac os disk utility cannot load disk mac os#
Select Mac OS Extended (Case-Sensitive, Journaled) if you want files with the same name but with different case treatments (Science Report.txt and science report.txt, for example) to be saved as separate files. Format: Most people should select Mac OS Extended (Journaled).Name: Give your RAID a name, like you would your hard drive. Now you need to set the properties for your RAID. If you have more than two, you can set one as Spare.Ĭlick the Next button after you’ve selected your disks. If you have two drives, they each need to be set as RAID Slice. A Spare is a drive that sits in waiting until a Slice fails, then data is mirrored to the spare automatically. A RAID Slice means the drive is an active part of the array and mirrors your data. When setting up a RAID 1, you have to decide if a drive should be a RAID Slice or a Spare. When you select a disk, all the partitions are automatically selected. (When you take the space of a storage device and divide it during formatting, you are creating partitions.)Ĭlick on the checkbox next to the disks you want to include in the RAID. The app shows the disk, and underneath each disk is a list of the partitions on that device. Disk Utility will show the drives eligible for the RAID format you select. The next step is to select your storage devices. It doesn’t offer data protection or better speed.Ĭhoosing a RAID format in macOS Sierra’s Disk Utility. Concatenated (JBOD): This simply takes your drives and uses them to create one storage volume.When your Mac needs to read a file, the performance is faster because the data can be read by multiple drives. (Mirrored) RAID 1: The same data is written to all the drives.But if backup isn’t an issue and you need the performance, go with RAID 0. It doesn’t offer data protection, so you’ll need to rely on another backup system, like Time Machine. (Striped) RAID 0: This one’s all about speed. On the opening screen of the RAID Assistant, you select the RAID type.
#Mac os disk utility cannot load disk how to#
How to access the RAID Assistant in macOS Sierra’s Disk Utility. To get to the RAID tools, click on the File menu and select RAID Assistant. With Disk Utility open, you should see the main window. You can also press Shift-Command-U or select the Go > Utilities menu while in the Finder. It’s located in the Utilities folder, which resides in your Applications folder. After you connect your storage devices to your Mac, launch Disk Utility.