To use Mirroring among servers, check the following notes when designing the system.
Items
Reference
Design
"3.9 Mirroring among Servers [4.3A40 or later] [RHEL6]"
Disk swap
"7.3.3 Swapping Disks of Netmirror Group"
Operation and Maintenance
"7.15 Mirroring Among Servers [4.3A40 or later] [RHEL6]"