Mobile appliances are going to be used in more area as the time goes by. The devices should be small, thus they can not have enough storage capacity. To alleviate these problems, we developed MobileStor, a iSCSI based remote storage system, for providing the allocation of a mass storage space to each mobile client through networks. The iSCSI protocol enables a client's block-level access to the data on remote storage over an existing IP infrastructure. However, the performance of the system for mobile appliances was dropped in wireless networks, since the protocol was originally developed for wired networks. Especially when we use default parameters values suggested in standard, the performance is decreased. This paper presents a remote storage system named MobileStor. Our experiments which are performed to investigate the best performance values of iSCSI parameters for iSCSI based remote storage system are taken out in CDMA networks in order to realize the access to a remote storage system anytime and anywhere. And after the experiment, we suggest the optimal value of parameters. The experiment results from several test cases show us the best values are not the default values specified in the iSCSI standard.