ATA COMMAND BLOCK AND SET DESCRIPTION |
|
Set Features — EFh
The Set Features command allows the host to configure the feature set of the device according to the attributes listed in Table 49.
Table 48: Set Features — EFh
Register | D7 | D6 | D5 | D4 |
| D3 | D2 |
| D1 | D0 |
Feature |
|
|
| Feature |
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| |
Sector Count |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Sector Number |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Cylinder Low |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Cylinder High |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Drive Head | X | X | X | Drive |
|
|
| X |
| |
|
|
|
|
|
|
|
|
|
|
|
Command |
|
|
| EFh |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| Table 49: Set Features’ Attributes |
|
|
Feature | Operation |
|
|
01h | Enable |
|
|
66h | Disable reverting to power on defaults |
|
|
81h | Disable |
|
|
BBh | 4 bytes of data apply on Read/Write Long commands |
|
|
CCh | Enable revert to power on defaults |
|
|
On
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All unauthorized use and/or reproduction is prohibited.
PAGE 48 | FEBRUARY 2, 2009 |