Fujitsu MHN2100AT - Mobile 10 GB Hard Drive Product Manual page 120

Interface
then Automatic Acoustic Management is enabled. The AAM level setting is
preserved by the drive across power on, hardware and software resets.
Standard Seek
Slow Seek
(15) SET MULTIPLE MODE (X'C6')
This command enables the device to perform the READ MULTIPLE and
WRITE MULTIPLE commands. The block count (number of sectors in a
block) for these commands are also specified by the SET MULTIPLE MODE
command.
The number of sectors per block is written into the Sector Count register. The
IDD supports 2, 4, 8, 16 and 32 (sectors) as the block counts.
Upon receipt of this command, the device sets the BSY bit of the Status register
and checks the contents of the Sector Count register. If the contents of the Sector
Count register is valid and is a supported block count, the value is stored for all
subsequent READ MULTIPLE and WRITE MULTIPLE commands. Execution
of these commands is then enabled. If the value of the Sector Count register is
not a supported block count, an ABORTED COMMAND error is posted and the
READ MULTIPLE and WRITE MULTIPLE commands are disabled.
If the contents of the Sector Count register is 0, 1 when the SET MULTIPLE
MODE command is issued, the READ MULTIPLE and WRITE MULTIPLE
commands are disabled.
When the SET MULTIPLE MODE command operation is completed, the device
clears the BSY bit and generates an interrupt.
5-44
AAM Level
Standard Seek
Slow Seek
Reserved
: Maximum performance
: Minimum acoustic emanation
Sector Count register
C0h-FEh, 00h
80h-BFh
01h-7Fh, FFh
C141-E120-02EN