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) | |
Acoustic mode (Slow Seek) | |
Abort | |
Non Operate | 00h, FFh |
|
|
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 |
|
| 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 |
|
| after issuing this set features shall be verified. |
- | Reserved (Abort) |