IBM DTLA-305040 Hard Drive Specifications - Page 105

Advanced Power Management feature set APM, 14 Automatic Acoustic Management feature set AAM

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The IDENTIFY DEVICE information indicates the states as follows: Ÿ identify device information is complete or incomplete Ÿ this feature set is implemented Ÿ this feature set is enabled or disabled Ÿ the device needs the Set Features command to spin-up into active state 10.13 Advanced Power Management feature set (APM) This feature allows the host to select an advanced power management level. The advanced power management level is a scale from the lowest power consumption setting of 01h to the maximum performance level of FEh. Device performance may increase with increasing advanced power management levels. Device power consumption may increase with increasing advanced power management levels. The advanced power management levels contain discrete bands described in the section of Set Feature command in detail. This feature set uses the following functions: 1. A SET FEATURES subcommand to enable Advanced Power Management 2. A SET FEATURES subcommand to disable Advanced Power Management Advanced Power Management, Automatic Acoustic Management, and the Standby timer setting are independent functions. The device shall enter Standby mode if any of the following are true: 1. The Standby timer has been set and times out 2. Automatic Power Management is enabled, and the associated algorithm indicates that the Standby mode should be entered to save power 3. Automatic Acoustic Management is enabled, and the associated algorithm indicates that the Standby mode should be entered to reduce acoustical emanations The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management feature is supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if set. Word 91, bits 7-0 contains the current Advanced Power Management level if it is enabled. 10.14 Automatic Acoustic Management feature set (AAM) This feature set allows the host to select an acoustic management level. The acoustic management level may range from the lowest acoustic emanation setting of 01h to the maximum performance level of FEh. Device performance and acoustic emanation may increase with increasing acoustic management levels. The acoustic management levels may contain discrete bands. Automatic Acoustic Management levels 80h and higher do not permit the device to enter Standby mode as a result of the Automatic Acoustic Management algorithm. The Automatic Acoustic Management feature set uses the following functions: 1. A SET FEATURES subcommand to enable Automatic Acoustic Management 2. A SET FEATURES subcommand to disable Automatic Acoustic Management Advanced Power Management, Automatic Acoustic Management, and the Standby timer setting are independent functions. The device shall enter Standby mode if any of the following are true: 1. The Standby timer has been set and times out. 2. Automatic Power Management is enabled and the associated algorithm indicates that the Standby mode should be entered to save power. Deskstar 40GV & 75GXP hard disk drive specifications 93

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The IDENTIFY DEVICE information indicates the states as follows:
°
identify device information is complete or incomplete
°
this feature set is implemented
°
this feature set is enabled or disabled
°
the device needs the Set Features command to spin-up into active state
10.13
Advanced Power Management feature set (APM)
This feature allows the host to select an advanced power management level. The advanced power man-
agement level is a scale from the lowest power consumption setting of 01h to the maximum performance
level of FEh. Device performance may increase with increasing advanced power management levels.
Device power consumption may increase with increasing advanced power management levels. The ad-
vanced power management levels contain discrete bands described in the section of Set Feature com-
mand in detail. This feature set uses the following functions:
1.
A SET FEATURES subcommand to enable Advanced Power Management
2.
A SET FEATURES subcommand to disable Advanced Power Management
Advanced Power Management, Automatic Acoustic Management, and the Standby timer setting are inde-
pendent functions. The device shall enter Standby mode if any of the following are true:
1.
The Standby timer has been set and times out
2.
Automatic Power Management is enabled, and the associated algorithm indicates that the Standby
mode should be entered to save power
3.
Automatic Acoustic Management is enabled, and the associated algorithm indicates that the
Standby mode should be entered to reduce acoustical emanations
The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management feature is
supported if set. Word 86, bit 3 indicates that Advanced Power Management is enabled if set. Word 91,
bits 7-0 contains the current Advanced Power Management level if it is enabled.
10.14 Automatic Acoustic Management feature set (AAM)
This feature set allows the host to select an acoustic management level. The acoustic management level
may range from the lowest acoustic emanation setting of 01h to the maximum performance level of FEh.
Device performance and acoustic emanation may increase with increasing acoustic management levels.
The acoustic management levels may contain discrete bands. Automatic Acoustic Management levels
80h and higher do not permit the device to enter Standby mode as a result of the Automatic Acoustic
Management algorithm. The Automatic Acoustic Management feature set uses the following functions:
1.
A SET FEATURES subcommand to enable Automatic Acoustic Management
2.
A SET FEATURES subcommand to disable Automatic Acoustic Management
Advanced Power Management, Automatic Acoustic Management, and the Standby timer setting are
independent functions. The device shall enter Standby mode if any of the following are true:
1.
The Standby timer has been set and times out.
2.
Automatic Power Management is enabled and the associated algorithm indicates that the Standby
mode should be entered to save power.
Deskstar 40GV & 75GXP hard disk drive specifications
93