Smart Enable Operations (D8H); Smart Execute Off-Line Immediate (D4H) - Samsung SpinPoint M8 Product Manual

A value of F1h written by the host into the device's Sector Count Register before issuing this command shall
cause this feature to be enabled. Any other meaning of this value or any other non-zero value written by the
host into this register before issuing this command may differ from device to device.
8.2.34.3

Smart enable operations (D8h)

This command enables all SMART capabilities within the device. Prior to receipt of this command SMART
data are neither monitored nor saved by the device. The state of SMART (either enabled or disabled) shall be
preserved by the device across power cycles. Once enabled, the receipt of subsequent SMART ENABLE
OPERATIONS commands shall not affect any SMART data or functions.
8.2.34.4

Smart execute off-line immediate (D4h)

This command causes the device to immediately initiate the activities that collect SMART data in an off-line
mode and then save this data to the device's non-volatile memory.
During execution of its off-line activities the device shall not set BSY nor clear DRDY.
If the device is in the process of performing its set of off-line data collection activities (as a result of receiving a
SMART EXECUTE OFF-LINE IMMEDIATE command from the host), and is interrupted by any new
command from the host except a SMART DISABLE OPERATIONS, SMART EXECUTE OFF-LINE
IMMEDIATE, or STANDBY IMMEDIATE command, the device shall suspend or abort its off-line data
collection activities and service the host within two seconds after receipt of the new command. After
servicing the interrupting command from host the device may immediately re-initiate or resume its off-line
data collection activities without any additional commands from host
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.
Spinpoint M8 Product Manual REV 2.7
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