Abstract: A storage management method, a storage management apparatus, and a storage device are provided. The method is applied to a virtual machine system, where a logical disk is allocated to a virtual machine in the virtual machine system, and the logical disk includes at least two types of physical disks. The method includes obtaining logical disk composition information of the virtual machine, where the logical disk composition information of the virtual machine identifies a distribution status, in each type of physical disk, of logical disk storage space of the virtual machine, and adjusting the logical disk composition information of the virtual machine according to a preset load balancing policy. Adjusting the logical disk composition information of the virtual machine does not need to create a new logical disk, and therefore does not need to migrate a logical disk between hosts.