Abstract: An extensible wire-reeling cigarette clamp specifically used in a car includes an extensible rod, a reel, a reel slider and a clamping spring. The extensible rod is fixed on a fixing board locked on a bracket of a rear-view mirror of a car, the reel is connected at an end of the extensible rod, the reel slider is connected to a wire in the reel, and the clamping spring is connected with the reel slider. To smoke a cigarette, a smoker in the car only needs to pull the reel slider gently and then the cigarette on the clamping spring can be drawn into the smoker's mouth for smoking. After smoking, the smoker only tugs the reel slider and then the reel can wind the reel slider automatically to its original position. As the smoker smokes without glancing at the cigarette clamp, the safety of driving is assured.

Abstract: The invention discloses an indexing device for a data storage system which comprises a plurality of data storage devices. The indexing device generates an I/O descriptor index number according to a target data storage device, where the I/O descriptor index number corresponds to a device ID number and a queued command tag number. After receiving from the target data storage device an information packet containing the queued command tag number and a second connection request data frame including the device ID number, the indexing device can calculate the I/O descriptor index number according to the device ID number and the queued command tag number.

Abstract: The invention discloses an indexing device for a data storage system which comprises a plurality of data storage devices. The indexing device generates an I/O descriptor index number according to a target data storage device, where the I/O descriptor index number corresponds to a device ID number and a queued command tag number. After receiving from the target data storage device an information packet containing the queued command tag number and a second connection request data frame including the device ID number, the indexing device can calculate the I/O descriptor index number according to the device ID number and the queued command tag number.