Resynchronizing Virtual Disks
There are two resynchronization methods for remote replications:
•
Manual resynchronization—See "Manually Resynchronizing Virtual Disks"
on page 208.
•
Automatic resynchronization—See "Automatically Resynchronizing
Virtual Disks" on page 208.
For more information about synchronization and resynchronization in remote
replications, see:
•
"Normally Synchronized Virtual Disks" on page 204.
•
"Unsynchronized Virtual Disks" on page 207.
•
"Setting Synchronization Priority and Synchronization Method" on
page 196.
•
"Changing Synchronization Priority and Method" on page 205.
•
"Resynchronizing Virtual Disks" on page 204.
You may need to periodically test the communication between the primary
virtual disk and the secondary virtual disk in a remote replication, especially
after resynchronizing virtual disks. For information about testing the
communication, go to Testing Communication between the Primary and
Secondary Virtual Disk.
Normally Synchronized Virtual Disks
In a normally synchronized remote replication, RAID controller module
owners manage the transfer of data from the primary to the secondary virtual
disk. In a normal remote replication, these events occur:
1 The primary virtual disk receives a write request from a host.
2 The RAID controller module owner on the storage array logs information
about the write operation to a replication repository virtual disk in the
storage array.
3 The RAID controller module owner writes the data to the primary virtual disk.
4 The RAID controller module owner starts a data transfer operation to the
secondary virtual disk on the secondary storage array.
204
Configuration: Premium Feature— Remote Replication