Справочник Пользователя для Samsung 3.5" hard disk drives

DISK DRIVE OPERATION 

 

SpinPoint V40 Product Manual

71

 

 
This command causes the drive to set BSY, enter the Standby Mode, clear BSY, and assert INTRQ. INTRQ 
is asserted even though the device may not have fully transitioned to Standby Mode. 
 
If the Sector Count register is non-zero, then the Standby Timer is enabled. The value in the Sector Count 
register shall be used to determine the time programmed into the Standby Mode. 
 
The value in the Sector Count register when the STANDBY command is issued shall determine the time 
period programmed into the Standby Timer. See Table 6-7. 
 

 
Individual SMART commands are identified by the value placed in the Feature resister. Table 6-10 shows 
these Feature register values. 
 

Table 6-10 SMART Feature register values 

Value 

Command 

00h-CFh Reserved 
D0h 

SMART READ DATA 

D1h 

SMART READ ATTRIBUTE THRESHOLDS 

D2h 

SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE 

D3h 

SMART SAVE ATTRIBUTE VALUES 

D4h 

SMART EXECUTE OFF-LINE IMMEDIATE 

D5h 

SMART READ LOG SECTOR 

D6h 

SMART WRITE LOG SECTOR 

D7h Obsolete 
D8h 

SMART ENABLE OPERATIONS 

D9h 

SMART DISABLE OPERATIONS 

DAh 

SMART RETURN STATUS 

DBh 

SMART ENABLE / DISABLE AUTOMATIC OFF-LINE  

DCh-DFh Reserved 
E0h-FFh Vendor 

specific 

 
 

 
This command disables all SMART capabilities within the device including any and timer and event count 
functions related exclusively to this feature. After receipt of this command the device shall disable all 
SMART operations. SMART data shall no longer be monitored or saved by the device. The state of SMART 
(either enabled or disabled) shall be preserved by the device across power cycles. 
 
After receipt of this command by the device, all other SMART commands (including SMART DISABLE 
OPERATIONS commands), with the exception of SMART ENABLE OPERATIONS, are disabled and 
invalid and shall be command aborted by the device.