To provide a method and device for dynamically adjusting head currents.

The efficiency and data integrity of a data storage device are improved by dynamically adjusting a particular operation parameter to its optimal value during the operation of the storage device. The physical properties of the storage device such as a hard disk drive are measured during the process of manufacturing, thereby obtaining the dependency of the storage device on environmental conditions, under which the storage device is operated. The effects of the physical properties and the operation environment of the storage device on its performance are obtained, and a writing current optimal value of the storage device is stored in a lookup table. A temperature in which the storage device is operated is used as a reference to data stored in the lookup table. The optimal value of pre-compensation delay is also stored. During the operation of the storage device, the temperature of an operation environment is sensed, and used as a reference to the lookup table. The optimal values of a writing current and pre-compensation delay corresponding to the sensed temperature are taken out, and the writing current and the pre-compensation delay of the storage device are accordingly adjusted.