Hitachi travelstar hds723020bla642 用户手册

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7K200 SATA OEM Specification 
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14.2.3 
DEVICE CONFIGURATION IDENTIFY (subcommand 
C2h)  
The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO 
data-in transfer. The content of this data structure indicates the selectable commands, modes, and 
feature sets that the device is capable of supporting. If a DEVICE CONFIGURATION SET command 
has been issued reducing the capabilities, the response to an IDENTIFY DEVICE or IDENTIFY 
PACKET DEVICE command will reflect the reduced set of capabilities, while the DEVICE 
CONFIGURATION IDENTIFY command will reflect the entire set of selectable capabilities.   
The format of the Device Configuration Overlay data structure is shown on next page.   
14.2.4 
DEVICE CONFIGURATION SET (subcommand C3h)   
The DEVICE CONFIGURATION SET command allows a device manufacturer or a personal 
computer system manufacturer to reduce the set of optional commands, modes, or feature sets 
supported by a device as indicated by a DEVICE CONFIGURATION IDENTIFY command. The 
DEVICE CONFIGURATION SET command transfers an overlay that modifies some of the bits set 
in words 63, 78, 79, 82, 83, 84, and 88 of the IDENTIFY DEVICE command response. When the bits 
in these words are cleared, the device no longer supports the indicated command, mode, or feature 
set. If a bit is set in the overlay transmitted by the device that is not set in the overlay received from 
a DEVICE CONFIGURATION IDENTIFY command, no action is taken for that bit.   
The format of the overlay transmitted by the device is described in the table at next page. The 
restrictions on changing these bits are described in the text following that table. If any of the bit 
modification restrictions described are violated or any setting is changed with DEVICE 
CONFIGURATION SET command, the device shall return command aborted. At that case, error 
reason code is returned to sector count register, invalid word location is returned to LBA High 
register, and invalid bit location is returned to LBA Mid register. The Definition of error information 
is shown on the next page.   
ERROR INFORMATION EXAMPLE 1:   
After establish a protected area with SET MAX address, if a user attempts to execute DC SET or DC 
RESTORE, device abort that command and return error reason code as below.   
LBA High 
: 03h 
= word 3 is invalid 
LBA Mid 
: 00h 
this register is not assigned in this case 
Sector count 
: 06h 
= Protected area is now established 
ERROR INFORMATION EXAMPLE 2:   
When device is enabled the Security feature set, if user attempts to disable that feature, device abort 
that command and return error reason code as below.   
LBA High 
: 07h 
= word 7 is invalid 
LBA Mid 
: 08h 
= bit 3 is invalid 
Sector count 
: 04h 
= now Security feature set is enabled