ATA COMMAND BLOCK AND SET DESCRIPTION |
|
Identify Drive — ECh
Issued by the host, the Identify Drive command provides 256 bytes of drive attribute data (i.e., sector size, count, and so on) The identify drive data structure is detailed in the following table.
Table 34: Identify Drive — ECh
Register | D7 | D6 | D5 | D4 |
| D3 | D2 |
| D1 | D0 |
Feature |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Sector Count |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Sector Number |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Cylinder Low |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Cylinder High |
|
|
| X |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
| |
Drive Head | X | X | X | Drive |
|
|
| X |
| |
|
|
|
|
|
|
|
|
|
|
|
Command |
|
|
| ECh |
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
SILICONSYSTEMS PROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
PAGE 33 | FEBRUARY 2, 2009 |
