When a disk device corresponding to a logical volume is started, a disk system determines and starts a disk device and a fan to be started, while comprehensively considering heat quantity generated by the disk device to be started, the cooling capacity of the fan, and the electric power consumption of the fan or the electric power consumption of the disk device.

 
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< Communications channel with programmable coupling

> Active fly height control using radio frequency feedback

> Optimizing tape speed for a sync operation

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