Hitachi hard disk 0J11285 500 GB 2.5 " 8 MB 0J11285 Ficha De Dados
Códigos do produto
0J11285
Z5K500 OEM Specifications
Software Setting Preservation Feature Set
65
12.13
When a device is enumerated, software will configure the device using Set Features and other
commands. These software settings are often preserved across software reset but not necessarily
across hardware reset. In Parallel ATA, only commanded hardware resets can occur, thus legacy
software only reprograms settings that are cleared for the particular type of reset it has issued. In Serial
ATA, COMRESET is equivalent to hard reset and a non-commanded COMRESET may occur if there is
an asynchronous loss of signal. Since COMRESET is equivalent to hardware reset, in the case of an
asynchronous loss of signal some software settings may be lost without legacy software knowledge. In
order to avoid losing important software settings without legacy driver knowledge, the software settings
preservation ensures that the value of important software settings is maintained across a COMRESET.
Software settings preservation may be enabled or disabled using Set Features with a subcommand code
of 06h. Software settings preservation is enabled by default.
commands. These software settings are often preserved across software reset but not necessarily
across hardware reset. In Parallel ATA, only commanded hardware resets can occur, thus legacy
software only reprograms settings that are cleared for the particular type of reset it has issued. In Serial
ATA, COMRESET is equivalent to hard reset and a non-commanded COMRESET may occur if there is
an asynchronous loss of signal. Since COMRESET is equivalent to hardware reset, in the case of an
asynchronous loss of signal some software settings may be lost without legacy software knowledge. In
order to avoid losing important software settings without legacy driver knowledge, the software settings
preservation ensures that the value of important software settings is maintained across a COMRESET.
Software settings preservation may be enabled or disabled using Set Features with a subcommand code
of 06h. Software settings preservation is enabled by default.
12.13.1
Preserved software settings
If Software setting preservation is enabled, the following settings are preserved across COMRESET.
Otherwise settings are cleared across COMRESET.
Otherwise settings are cleared across COMRESET.
Setting Contents
Track length
Number of head
Number of cylinder
Initialize device parameters
Capacity
Power Management Feature Set Standby
Timer
Timer
Time to fall into standby mode
Security freeze lock
Security mode state
Security unlock
Set max address
Capacity
Write Cache Enable/Disable
Set Transfer Mode
Advanced Power Management Enable/Disable
Read Look-Ahead
Write Cache Enable/Disable
Set Transfer Mode
Advanced Power Management Enable/Disable
Read Look-Ahead
Set feature
Reverting to Defaults
Set multiple mode
Block size
Table 38 Preserved Software Setting