An option available for that will automatically the data on the and , after a link interruption or error causes the to become , is corrected.
When the of the primary virtual disk receives a write request from a , the first logs information about the write to a then writes the data to the primary virtual disk. The RAID controller module then initiates a write operation to copy the affected data to the secondary virtual disk on the remote, secondary .
If a link interruption or virtual disk error prevents communication with the secondary storage array, the RAID controller module owner of the primary virtual disk transitions the mirrored pair into an and sends an I/O completion to the host sending the write request. When connectivity is restored between the primary storage array and the secondary storage array, the blocks of data that have changed on the primary virtual disk during the link interruption will be automatically copied to the secondary virtual disk.