A small manufacturing customer has data center that is prone of flooding. The customer has a limited budget. The customer has two HP 3PAR StoreServ 7000 Storage systems in the primary data center…

5 Mb half-duplex is insufficient, as the calculated average bandwidth required is approximately 9.48 Mbps, and half-duplex is less efficient for continuous data transfer.

To calculate the minimum bandwidth, first determine the daily data change: 0.5% of 20 TB (two 10 TB systems) is 0.005 * 20 * 1024 GB = 102.4 GB. Averaging this over 24 hours gives 102.4 GB / (24 hours * 3600 seconds/hour) = 1.185 MB/s. Converting to bits per second, 1.185 MB/s * 8 bits/byte = 9.48 Mbps, making 10 Mb full-duplex the closest and most appropriate minimum link speed for continuous asynchronous replication.

20 Mb full-duplex would be sufficient but is not the *minimum* required bandwidth, as 10 Mb full-duplex is closer to the calculated average.

40 Mb half-duplex is significantly higher than the minimum required bandwidth, and half-duplex is less efficient than full-duplex for continuous replication traffic.