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5.3 Host Commands
C141-E262 5-125
*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)
Acoustic mode (Slow Seek)
Abort
Non Operate
C0h-FEh
80h-BFh
01h-7Fh
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)
SN SC 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)