1. A method comprising: issuing, at a host processor, a write command to a primary storage controller; receiving, at the primary storage controller, the write command; transferring, at the primary storage controller, write data associated with the write command to a primary storage controller memory local to the primary storage controller; resending, at the host processor, the write command to a peer storage controller, wherein the peer storage controller provides redundancy for the primary storage controller; receiving, at the peer storage controller, the write command; transferring, at the peer storage controller, the write data associated with the write command to a peer storage controller memory local to the peer storage controller; writing, by the primary storage controller, the write data from the primary storage controller memory to a storage subsystem; and instructing, by the primary storage controller, the peer storage controller to discard the write data stored in the peer storage controller memory.