Automatic Acoustic Management Feature Set (Aam) - Hitachi 7K400 - Deskstar Hard Drive Specifications

10.15 Automatic Acoustic Management feature set (AAM)

This feature set allows the host to select an acoustic management level. The acoustic management level ranges the
setting of 80h to FEh. Device performance and acoustic emanation may increase with increasing acoustic
management levels. The acoustic management levels may contain discrete bands described in the section of the Set
Feature command in detail.
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.
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 9 indicates that Automatic Acoustic Management feature is
supported if set. Word 86, bit 9 indicates that Automatic Acoustic Management is enabled if set. Word 94, bits 7-0s
contains the current Automatic Acoustic Management level if Automatic Acoustic Management is enabled, and bits
8-15 contain the Vendor's recommended AAM level.
Deskstar 7K400 Hard Disk Drive Specification
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