Method for improving SSD utilization rate, storage device and SSD controller

The invention discloses a device for improving the utilization rate of a solid state disk. The device comprises a solid state disk SSD controller and a storage medium array, wherein the SSD controller comprises a receiving unit and a processing unit, the storage medium array comprises at least one PU, and the PU is divided into a main area MA and/or a lease area LA; the receiving unit is used for receiving at least one service issued by at least one host or virtual machine; the processing unit is used for determining the required minimum number of concurrent units (PU) for each service; the processing unit is further configured to allocate traffic to the MA or LA of the least number of PUs. 一种提升固态硬盘利用率的装置，装置包括：固态硬盘SSD控制器和存储介质阵列；其中，SSD控制器包括接收单元和处理单元，存储介质阵列至少一个PU，PU划分为主区MA和/或出租区LA；接收单元，用于接收至少一个主机或虚拟机下发的至少一个业务；处理单元，用于针对每个业务，确定所需最少并发单元PU数；处理单元还用于，将业务分配至最少PU数个PU的MA或LA。