DISK DRIVE OPERATION
If the device is in the process of performing its off-line data collection activities and is interrupted by a STANDBY IMMEDIATE command from the host, the device shall suspend or abort its off-line data collection activities, and service the host within two seconds after receipt of the command. After receiving a new command that causes the device to exit a power saving mode, the device shall initiate or resume off-line data collection activities without any additional commands from the host unless the device aborted these activities.
If the device is in the process of performing its off-line data collection activities and is interrupted by a SMART DISABLE OPERATIONS command from the host, the device shall suspend or abort its off-line data collection activities and service the host within two seconds after receipt of the command. Upon receipt of the next SMART ENABLE OPERATIONS command the device may, after the next vendor specified event, either re-initiate its off-line data collection activities or resume those activities from where they had been previously suspended.
If the device is in the process of performing its off-line data collection activities and is interrupted by a SMART EXECUTE OFF-LINE IMMEDIATE command from the host, the device shall abort its off-line data collection activities and service the host within two seconds after receipt of the command. The device shall then re-initiate its off-line data collection activities in response to the new EXECUTE OFF-LINE IMMEDIATE command.
6.4.24.5Smart read data (D0h)
This command returns the Device SMART data structure to the host.
Table 6-11 defines the 512 bytes that make up the device SMART data structure.
| | Table 6-11Device SMART data structure |
| | |
Byte | F/V | Descriptions |
0-361 | X | Vendor specific |
362 | V | Off-line data collection status |
363 | X | Vendor specific |
364-365 | V | Total time in seconds to complete off-line data collection activity |
366 | X | Vendor specific |
367 | F | Off-line data collection capability |
368-369 | F | SMART capability |
370-385 | R | Reserved |
386-510 | X | Vendor specific |
511 | V | Data structure checksum |
Key:
F = the content of the byte is fixed and does not change.
V = the content of the byte is variable and may change depending on the state of the device or the commands executed by the device.
X = the content of the byte is vendor specific and may be fixed or variable. R = the content of the byte is reserved and shall be zero.
The value of the off-line data collection status byte defines the current status of the off-line activities of the device. Table 6-12 lists the values and their respective definitions.
