Use this dialog to set the way in which you want writes to the remote acknowledged to the system that sent the I/O request.
When the is selected, the on the primary storage array waits until data has been successfully copied to the secondary storage array before sending an I/O completion back to the host system. If the is selected, the primary-side RAID controller module sends an I/O completion to the host system before the data has successfully been copied to the secondary storage array.
Synchronous - This mode offers the best chance of full data from the secondary storage array in the event of a disaster, at the expense of host I/O performance and is the preferred mode of operation.
Asynchronous - This mode offers faster host I/O performance but does not guarantee that data was successfully written to the before indicating a successful write to the host system.
If Asynchronous mode is selected, the Add to write consistency group check box becomes available.
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Select Add to write consistency group check box if you want to ensure that writes to the secondary storage array are completed in the same order as on the primary storage array.
Note: Selecting this option might impact host I/O performance.
Frequently Asked