The Pegasus R4i, built for Mac Pro (2019), is a plug-and-play RAID MPX module with four 8TB swappable 7200rpm SATA HDDs, providing 32TB of raw storage. The Pegasus R4i comes preformatted in HW RAID 5. macOS Catalina includes built-in support, too, so you can get started using the volume immediately after installation.
Create a disk set using Disk Utility on Mac. You can create a Redundant Array of Independent Disks (RAID) set to optimize storage performance and increase reliability in case of a disk failure. You can also create a set that concatenates smaller disks to act as one larger disk. To set up a RAID array in Mac OS X, follow these steps: From the RAID tab of Disk Utility, click and drag the disks from the list at the left to the Disk box at the right. Click the RAID Type pop-up menu to specify the type of RAID that you need. Striped RAID Set: Choosing this can speed up your hard drive performance by splitting data between. Reinstalling Mac OS X or Mac OS X Server, you can use the Create RAID Set command and the Create Volume command to set up your RAID storage. To set up RAID sets and volumes manually: 1 Start up the computer using the Mac OS X or Mac OS X Server installation disc that comes with the computer.
Install the Pegasus R4i module in slots 1-2 of Mac Pro
For best performance, Apple recommends that you install the Pegasus R4i module in slots 1-2 of your Mac Pro. You might have to move an existing MPX module from slots 1-2 to slots 3-4 in your Mac Pro. You can also find installation instructions in the quick start guide in the Pegasus R4i package and on the Promise website.
Restart Mac Pro and install the Pegasus Utility Software
Once you've installed the module and restarted your Mac Pro, the Pegasus R4i appears as a volume. When Mac Pro first recognizes the module, you’ll hear a series of tones from the module itself. And you’ll hear another set of tones when you log in and the volume mounts successfully. To manage the Pegasus R4i, install the Pegasus Utility software. The installer is located on the Pegasus volume. For help using the Pegasus Utility to manage your RAID volume, visit the Promise website.
Turn off Power Nap
As a final step, turn off Power Nap on your Mac Pro: in the Finder, choose System Preferences > Energy Saver, then deselect Enable Power Nap.
Raid System For Mac
Before shipping, always remove the Pegasus R4i Storage Module from your Mac Pro to avoid damaging your computer.
Disk Utility User Guide
How to set up a RAID in macOS Sierra’s Disk Utility. This will erase any data that exists on the disks you want to use for the RAID. Back up that data if you want to save it.
You can create a Redundant Array of Independent Disks (RAID) set to optimize storage performance and increase reliability in case of a disk failure. You can also create a set that concatenates smaller disks to act as one larger disk.
Mac Software Raid
In the Disk Utility app on your Mac, choose File > RAID Assistant.
Select a set type:
Striped (RAID 0) set: A striped RAID set can speed up access to your data. You can’t create a RAID set on your startup disk; you must first start up your computer from another disk.
Mirrored (RAID 1) set: Protect your data against hardware failure with a mirrored RAID set. When you create a mirrored RAID set, your data is written to multiple disks so the information is stored redundantly. You can’t create a RAID set on your startup disk; you must first start up your computer from another disk.
Concatenated (JBOD) set: Increase storage space with a concatenated disk 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.
Select the checkboxes of the disks you want to include in the set.
For 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.
Enter a name for the RAID set in the RAID Name field.
Click the Format pop-up menu, then choose a volume format that you want for all the disks in the set. (See File system formats available in Disk Utility.)
Click the “Chunk size” pop-up menu, then choose a disk chunk size that you want used for all the disks.
When you create a striped set, chunks of data from the same file are distributed across the drives. Ideally, you want data distributed across drives evenly and at an optimum size so that it can be efficiently accessed. If you want high data throughput from your set, choose a smaller chunk size so that data is spread across the drives and one drive can be accessing data while another is seeking the next chunk. With mirrored disk sets, choose a chunk size that matches the data you’re accessing. For example, when working with video files, your Mac is accessing large chunks of data, whereas when using a database of many small records, your disks may be accessing smaller chunks of information.
If you are creating a mirrored RAID set, select the “Automatically rebuild” checkbox to allow the set to be automatically rebuilt when member disks are reconnected.
Click Create.
Click Done.
If you have a Mac Pro with a Mac Pro RAID card, use RAID Utility. It uses the RAID card for better performance and to create more types of RAID sets.