RAID Level Description Advantage Disadvantage Ideal Usage
1
(pre-configured)
Disk Mirroring Maximum level 
of data 
protection; 
identical data is 
written to both 
drives.
Useable storage 
space is 50% of 
total available 
capacity.
Data 
applications 
where data 
security is 
paramount.
JBOD One or more 
logical drives.
Both disks 
are recognized 
as independent 
drives, allowing 
for 1 or 
more logical 
drives, resulting 
in maximum 
storage 
utilization.
No data 
protection or 
fault tolerance.
Applications 
where data 
stored on each 
drive needs to be 
separated.
Changing RAID Configuration
Warning!:
 Changing the RAID configuration will result in data loss.
1. Turn o the G-RAID MIRROR device.
2. Change the Dip-Switch setting to the desired RAID mode.
3. Press and Hold the RAID Mode Setting Switch and turn on the unit.
a. Continue Pressing the RAID Mode Setting Switch for 10 seconds. The front 
LED blinking fast indicates that RAID mode change has registered.
4. Turn the unit o, then back on for the new RAID setting to take aect.
5. Re-initialize the drive.
Initialize G-RAID MIRROR for macOS
G-RAID MIRROR was factory-formatted for use or "Initialized" for macOS. 
You can re-initialize to quickly erase the contents of the drive. Here are 
the steps.
Caution:
 Initializing or Re-Initializing a device will erase all data on the device. Do not 
continue if you wish to retain your information.
Note: Safely disconnect and remove any PRO-BLADE SSD mag from the PRO-BLADE SSD 
mag slot before beginning this process.
1. First, open the Disk Utility program located on your hard drive under 
Applications/Utilities/Disk Utility. The window below will appear. Your 
G-RAID MIRROR will be displayed in the left-hand column.
2.
Select the G-RAID MIRROR by clicking its drive icon in the left-side 
column. Information about the device will be displayed at the bottom 
of the window.
Main Activities
SanDisk Professional
User Manual
9