Techniques for block storage using a hybrid memory device are described. In at least some embodiments, a hybrid memory device includes a volatile memory portion, such as dynamic random access memory (DRAM). The hybrid memory device further includes non-volatile memory portion, such as flash memory. In at least some embodiments, the hybrid memory device can be embodied as a non-volatile dual in-line memory module, or NVDIMM. Techniques discussed herein employ various functionalities to enable the hybrid memory device to be exposed to various entities as an available block storage device.