INTERFACE COMMANDS
7 – 6
Mode Set/Check Commands
Mode Set/Check Commands
Mode Set/Check Commands
Mode Set/Check Commands
Mode Set/Check Commands
Set Features Mode
Set Features Mode
Set Features Mode
Set Features Mode
Set Features Mode
Enables or disables features supported by the drive. When the drive receives this command it:
1. Sets BSY,
2. Checks the contents of the Features register,
3. Clears BSY and
4. Generates an interrupt.
If the value of the register is not a feature supported by the drive, the command is aborted.
The acceptable values in the Features register are defined as follows:
VAL UE
DESC RIPTION
02 h
Enab led Wri te Cache
03 h
Se t Transfer Mod e ba se d on va lue i n Sector Count r egi ster
05 h
Ena ble Advance d Power Manageme nt
42 h
Enable Auto matic Acousti c Management. The se ctor co unt r egi ste r c ontai ns the
Auto mati c Ac ous ti c Man ag ement leve l.
SEC TOR
LEVEL
F Fh
Maxtor specifi c
FEh
Maxi mum p erforma nce
81h-FD h
Inte rmed i ate acousti c manag ement levels
80 h
Mi ni mum aco usti c e ma na tion le vel
00 h- 7 Fh
reserved
44 h
Le ngth of data append ed on Read Long/Wr i te L ong co mmand s sp eci fie d in the
Id entify D evi ce i nfor ma ti o n
55 h
Disable Re ad Lo ok-ahe ad feature
66 h
Di sa ble re ver ting to Powe r-on defaults
82 h
D i sabl e Write Cache
85 h
Disa ble Ad vanced Po wer Mana gement
AAh
Enab le Read L ook-a hea d fea ture
BBh
4 bytes of Maxtor speci fic data app end ed on Read Long /W ri te Lo ng co mma nds
C2h
D i sable Au to ma ti c Acousti c Ma nageme nt
CC h
Ena ble rever tin g to Power- on defaults
