IBM DBCA-204860 Hard Drive Specifications - Page 73
General Operation Descriptions
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10.0 General Operation Descriptions 10.1 Reset Response There are three types of reset in ATA as follows: Power On Reset (POR) The device executes a series of electrical circuitry diagnostics, spins up the HDA, tests speed and other mechanical parametric, and sets default values. Hard Reset (Hardware Reset) RESET- signal is negated in ATA Bus. The device executes a series of electrical circuitry diagnostics, spins up the HDA, tests speed and other mechanical parametric, and sets default values. Soft Reset (Software Reset) SRST bit in the Device Control Register is set, then is reset. The device resets the interface circuitry according to the Set Features requirement. The actions of each reset is shown in Figure 45 on page 66. © Copyright IBM Corp. 1998 65