A method for managing read/write (R/W) operations on an electronic device with hard disks, includes: upon receipt of R/W operation information related to an intended R/W operation, configuring a processor to decide which of the hard disks will be read/written with reference to the R/W operation information and sets of pre-established performance information. The sets respectively correspond to R/W operation settings. Each set includes multiple pieces of information each containing a performance indication related to a corresponding one of candidate combinations of the hard disks under the corresponding R/W operation setting. The decision is made with reference to the set, the R/W operation setting corresponding to which matches the R/W operation information.