5.3 Host Commands

*4) Automatic Acoustic Management (AAM)

The host writes to the Sector Count filed with the requested acoustic management level and executes this command with subcommand code 42h, and then Automatic Acoustic Management is enabled. The AAM level setting is preserved by the drive across power on and COMRESET.

AAM Level

Sector Count Filed

 

 

Performance mode (Fast Seek)

C0h-FEh

Acoustic mode (Slow Seek)

80h-BFh

Abort

01h-7Fh

Non Operate

00h, FFh

 

 

High-speed seek to which gives priority to the performance operates as for "Performance mode", and low-speed seek by which the seek sound is suppressed operates as for "Acoustic mode".

Setting the seek mode by this command is applied to the seek operation in all command processing.

*5) Write-Read-Verify feature (optional)

Table 5.36 Write-Read-Verify feature sector counts

SC

SN

Description

00h (Mode 0)

-

Enabled Always

01h (Mode 1)

-

The first 65,536 logical sectors written by the host

 

 

after every spin-up (or reset) or after issuing this

 

 

set features shall be verified.

02h (Mode 2)

-

Device may determine, for itself, how many logical

 

 

sectors to do.

03h (Mode 3)

Verify count

The first (Verify Sector Count x 1024) logical

 

 

sectors written by the host after every spin-up or

 

 

after issuing this set features shall be verified.

04h-FFh

-

Reserved (Abort)

C141-E249

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Fujitsu MHW2060BS, MHW2100BS, MHW2080BS, MHW2120BS Automatic Acoustic Management AAM, Write-Read-Verify feature optional