User Manual

Seagate SkyHawk Serial ATA Product Manual, Rev. B 13
www.seagate.com Drive specifications
PowerChoice provides the following reporting methods for tracking purposes
Check Power Mode Command
 Reports the current power state of the drive
Identify Device Command
 EPC Feature set supported flag
 EPC Feature enabled flag is set if at least one Idle power condition timer is enabled
Power Condition Log reports the following for each power condition
 Nominal recovery time from the power condition to active
 If the power condition is Supported, Changeable, and Savable
 Default enabled state, and timer value
 Saved enabled state, and timer value
 Current enabled state, and timer value
S.M.A.R.T. Read Data Reports
 Attribute 192 - Emergency Retract Count
 Attribute 193 - Load/Unload Cycle Count
PowerChoice Manufacture Default Power Condition Timer Values
Default power condition timer values have been established to assure product reliability and data integrity. A
minimum timer value threshold of two minutes ensures the appropriate amount of background drive maintenance
activities occur. Attempting to set a timer values less than the specified minimum timer value threshold will result in
an aborted EPC "Set Power Condition Timer" subcommand.
Setting power condition timer values less than the manufacturer specified defaults or issuing the EPC "Go to Power
Condition" subcommand at a rate exceeding the default timers may limit this products reliability and data integrity.
PowerChoice Supported Extended Power Condition Feature Subcommands
Power Condition Name Manufacturer Default Timer Values
Idle_a 100 ms
Idle_b 2 min
Idle_c 4 min
Standby_z 15 min
EPC Subcommand Description
00
H
Restore Power Condition Settings
01
H
Go to Power Condition
02
H
Set Power Condition Timer
03
H
Set Power Condition State
04
H
Enable EPC Feature Set
05
H
Disable EPC Feature Set