Techniques for replicating a write-back cache are provided. In one embodiment, a first computer system can receive a write request from a virtual machine (VM) that includes data to be written to a shared storage device. The first computer system can further save the data in a local cache device and transmit, via a network interface controller (NIC), a data packet including the data to a second computer system. Upon determining that the data packet has been transmitted via the NIC, the first computer system can communicate an acknowledgment to the VM indicating that the write request has been successfully processed.