Fujitsu MHV2120BH Product Manual page 179

Table 5.26 Features field values and settable modes (2/2)
Features
Field
X ' 90' Disables the Serial ATA function.
X ' AA ' Enables the read cache function.
Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
X ' BB '
commands. (Note 1)
X ' C2 ' Disables the Acoustic management function.
X ' CC ' Enables the reverting to power-on default settings after software reset. (Note 1)
Clearing DRQ bit to zero when error bit is set is disabled.
X ' DF '
The drive executes the dummy transferring. (Note 2)
Note 1: Although there is a response to the command, nothing is done.
Note 2: Although there is a response to the command and this command reflects on Identify
Device information, DRQ bit is always cleared to zero when error is occurred in PIO
read command (This drive always doesn't the dummy transferring).
At power-on, the default mode is set as follows:
Write cache function
Transfer mode
Advanced power
management function
Acoustic
management function
Read cache function
At power-on or COMRESET, the default mode of Serial ATA function is set as
follows:
DMA Setup FIS Auto-Activate optimization
Device-initiated interface power state Transitions
Software Settings Preservation
C141-E224
Drive operation mode
: Enabled
: PIO Mode-4, Multiworld DMA Mode-2
: Enabled (Mode-1)
: State keeping
: Enabled
: Disabled
: Disabled
: Enabled
5.3 Host Commands
5-105