Seagate ST3660A Product Manual - Page 14

6 Medalist XE Family Product Manual, Rev. B The Idle and Standby timers are disabled at the factory. Use the computer's setup utility to enable and set the timer delays. When the Idle timer is enabled, it is initialized each time the drive completes a read, write or seek. If the Idle timer reaches zero before any drive activity is required, the drive goes into the Idle mode, and the Standby timer, if it is enabled, is initialized. If the Standby timer reaches zero before any drive activity is required, the drive goes into the Standby mode. See the Seagate ATA Interface Reference Manual, publication number 36111-xxx for details. In both the Idle and Standby modes, the drive accepts all commands and returns to the Active mode any time disc access is necessary. There may be a slight delay between the time the drive receives the command and drive activity begins. 1.7.3.2 Power dissipation The following guidelines are used to measure power dissipation: • All measurements are taken at sea level with an ambient temperature of 25°C. • All typical measurements are taken using nominal voltages; the peak startup power is measured using the nominal voltages. • Seek current measurements are taken using an RMS meter while the drive is randomly seeking with two spindle rotations between each seek. Mode Spinup (peak) Active Seeking (typ) Read/write (typ) Idle1 (typ) Standby1 (typ) Sleep1 (typ) Current (amps) +12V +5V 1.2 0.35 0.34 0.145 0.12 0.025 0.025 0.23 0.32 0.085 0.085 0.070 Power (watts) 8.52 5.23 3.34 1.865 0.725 0.650 1. These power dissipation values apply only when power management is enabled. To enable power management, use the computer setup utility. 2. Spinup power is averaged over 3 seconds.