Fujitsu MHV2060BH, MHV2120BH, MHV2100BH, MHV2080BH Features field values and settable modes 2/2

5.3 Host Commands

	Table 5.26 Features field values and settable modes (2/2)
Features	Drive operation mode
Field
X ' 90’	Disables the Serial ATA function.
X ' AA '	Enables the read cache function.
X ' BB '	Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
	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)
X ' DF '	Clearing DRQ bit to zero when error bit is set is disabled.
	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	: Enabled
Transfer mode	: PIO Mode-4, Multiworld DMA Mode-2
Advanced power
management function	: Enabled (Mode-1)
Acoustic
management function	: State keeping
Read cache function	: Enabled

At power-on or COMRESET, the default mode of Serial ATA function is set as follows:

DMA Setup FIS Auto-Activate optimization	: Disabled
Device-initiated interface power state Transitions	: Disabled
Software Settings Preservation	: Enabled

C141-E224 5-105