Seagate Enterprise Performance 10K HDD v9 Product Manual, Rev. D (Draft 2)
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6.1.1
PowerChoice reporting methods
PowerChoice
TM
provides these reporting methods for tracking purposes:
Request Sense command reports
• Current power condition
• Method of entry
Note.
Processing the Request Sense command does not impact the drive’s power save state.
Mode Sense command reports (mode page 0x1A)
• Idle conditions enabled / disabled
• Idle condition timer values (100ms increments) (default, saved, current, changeable)
Power Condition Vital Product Data (VPD) Page (VPD page 0x8A)
• Supported power conditions
• Typical recovery time from power conditions (1ms increments)
Start/Stop Cycle Counter Log Page reports (log page 0x0E)
• Specified and accumulated Start/Stops and Load/Unload cycles
Power Condition Transitions Log Page reports (log page 0x1A, subpage 0x00)
• Accumulated transitions to Active, Idle_A, Idle_B, Idle_C, Standby_Y, Standby_Z
6.2
Power Balance
• Mode page 01h byte 6 bits 0 & 1 define the Active Level
• Active Levels - 00b Default,11b Lowest active power level
6.3
AC power consumption
None.
6.4
DC power consumption
The DC current measurements below are based on an average of drives tested under nominal operating conditions using 5V and 12V
input voltage at the drive interface connector.
Standard and SED drive models have identical hardware, however the encryption block of the controller ASIC is active for SED
models. This represents a small additional current draw on the 5V supply of about 30mA. There is no additional current draw on the
12V supply.
Operation at 6.0Gb mode reduces the +5V supply load by 15mA with a commensurate power reduction of 75mW.
Note
There is no measurable impact to the 12V supply load when running at lower interface speeds.
