IBM DTNA-22160 - Travelstar 2.1 GB Hard Drive Specifications page 22

3.3.7.2 Operating mode at power on
The device goes to Idle mode after power on or hard reset as an initial state. Initial state may be changed to
Standby mode using pin 47 on the interface connector. Refer to 6.8, " Drive Address Setting" on page 41 for
detail.
3.3.7.3 Adaptive power save control
The transient timing from active mode to Idle mode is adaptively controlled to the access pattern of the host
system.
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O E M Specifications of DTNA-2xxxx 2.5 inch H D D