Western Digital My Cloud EX4 User Manual - Manual (Page 158)

APPENDIX
153 WD MY CLOUD EX4 PERSONAL CLOUD STORAGE
USER MANUAL
Appendix D: Supported RAID Modes
Provided below is a chart identifying those modes that are supported for RAID storage.
Appendix E: RAID Migrations
The chart provided below identifies the RAID migration paths allowed on your WD My Cloud
EX4 device.
Note: RAID 1 + Spanning migration to RAID 5 is not supported.
Supported RAID Modes 1 Disk 2 Disks 3 Disks 4 Disks
Spanning No Yes Yes Yes
RAID 0 No Yes Yes Yes
RAID 1 No Yes No Yes, 2 RAIDs
RAID 5 No No Yes Yes
RAID 10 No No No Yes
Hot Spare (for RAID 5 only) No No No Yes
JBOD Yes Yes Yes Yes
From To
JBOD (1 Disk) • RAID 1 (2 disks)
• RAID 5 (3 disks)
• RAID 5 (4 disks)
RAID 1 (2 Disks) • RAID 5 (3 disks)
• RAID 5 (4 disks)
RAID 1 (2 DIsks with
spare) • RAID 5 (3 disks)
• RAID 5 (4 disks)