Fujitsu MJA2500BH - Mobile 500 GB Hard Drive Product/Maintenance Manual page 194

Interface
Table 5.34 Features field values and settable modes (2/2)
Features
Field
X '88' Undefined (Note 1)
X '8B' Disable Write-Read-Verify feature set.
X '90' Disables the Serial ATA function.
X '99' Undefined (Note 1)
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: Disabled
Software Settings Preservation:
5-120
Drive operation mode
Enabled
PIO Mode-4, Multiworld
DMA Mode-2
Enabled (Mode-1)
State keeping
Enabled
Disabled
Enabled
*5
C141-E293