Western Digital My Cloud EX2 User Manual - Manual (Page 88)

MANAGING STORAGE ON WD MY CLOUD EX2
83 WD MY CLOUD EX4 PERSONAL CLOUD STORAGE
USER MANUAL
RAID Storage
RAID (Redundant Array of Independent Disks) allows you to store the same data in different
places on multiple hard drives, providing necessary redundancy, greater performance, and
data integrity. There are several different levels of RAID, each one providing a different
method of sharing or distributing data among the drives. Your WD My Cloud EX2 device
allows you to select from the following storage modes:
RAID Mode Description
JBOD The use of one or more drives not in a RAID configuration but managed as
separate logical volumes.
Spanning Combination of drives in a linear fashion to create one large logical volume.
RAID 0 RAID 0 mode provides disk striping across all drives in the RAID drive group.
RAID 0 does not provide data redundancy but does provide the best performance
of any RAID levels. RAID 0 breaks up data into smaller segments and stripes the
data segments across each drive in the drive group.
RAID 1 In RAID 1 mode, the RAID controller duplicates all data from one drive to a second
drive in the drive group. RAID 1 provides complete data redundancy but cuts the
required storage capacity in half.
Viewing the Current RAID Mode
Use the following steps to view the RAID mode currently being used on your device.
1. On the navigation bar, click Storage to display the Storage screen.
2. Click RAID, if not already selected.
3. In the RAID Profile, the following information displays:
 RAID Health
 Auto-Rebuild status
 RAID Volume