Systems, methods, and other embodiments associated with a unified hybrid input/output adapter are described. According to one embodiment, an apparatus includes an Input/Output (I/O) interconnect configured to connect with a host device and to provide communications with the host device. The apparatus also includes a network adapter connected to the I/O interconnect and configured to communicate with a network storage. The apparatus includes a host adapter connected to the I/O interconnect and configured to communicate with a first storage device and a second storage device. The first storage device has a higher latency than the second storage device. The apparatus further includes a storage logic configured to control the I/O interconnect to cause storage access requests from the host device to be cached in the second storage device via the host adapter.