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30 Barracuda Serial ATA V Product Manual, Rev. B
4.2.1 Identify Device command
The Identify Device command (command code EC
H
) transfers information
about the drive to the host following power up. The data is organized as a sin-
gle 512-byte block of data, whose contents are shown in the table on page
27. All reserved bits or words should be set to zero. Parameters listed with an
“x” are drive-specific or vary with the state of the drive. See Section 2.0 on
page 3 for default parameter settings.
The following commands contain drive-specific features that may not be
included in the Serial ATA specification.
ATA-standard power-management commands
Check Power Mode 98h or E5h
Idle 97h or E3h
Idle Immediate 95h or E1h
Sleep 99h or E6h
Standby 96h or E2h
Standby Immediate 94h or E0h
ATA-standard security commands
Security Set Password F1h
Security Unlock F2h
Security Erase Prepare F3h
Security Erase Unit F4h
Security Freeze Lock F5h
Security Disable Password F6h
Table 7: Supported ATA commands
Command name Command code (in hex)