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1.8” Portable Solid State Drive
Transcend Information Inc.
V1.2
SMART DISABLE OPERATIONS
Disables the SMART function. Upon receiving the command, the drive disables all SMART operations. This setting is
maintained when the power is turned off and then back on.
Once this command has been received, all SMART commands other than SMART ENABLE OPERATIONS are aborted
with the Aborted Command error.
This command disables all SMART capabilities including any and all timer and event count functions related exclusively to
this feature. After command acceptance, this controller will disable all SMART operations. SMART data in no longer be
monitored or saved. The state of SMART is preserved across power cycles.
SMART RETURN STATUS
Reports the drive reliability status.
Values reported when a predicted defect has not been detected:
Cylinder Low register: 4Fh
Cylinder High register: C2h
Values reported when a predicted defect has been detected:
Cylinder Low register: F4h
Cylinder High register: 2Ch
SMART ENABLE/DISABLE AUTOMATIC OFF-LINE
Enables (when Sector Count register = “F8h”) or disables (Sector Count register = “00h”) the automatic off-line data
collection function. The automatic collection is disabled if a value of “00h” is set in the Sector Count register before a
subcommand is issued. If automatic collection is disabled, the drive can still save attribute information during normal
operation, such as during the power-on/off sequence or error correction sequence. The automatic collection function is
enabled if a value of “F8h” is set in the Sector Count register before the command is issued. Values other than “00h” and
“F8h” are vendor-specific.
STANDBY (E2h)
This command causes the device to set BSY, enter the Sleep mode (which corresponds to the ATA “Standby” Mode), clear
BSY and return the interrupt immediately.
STANDBY IMMEDIATE (E0h)
This command causes the drive to set BSY, enter the Sleep mode (which corresponds to the ATA “Standby” Mode), clear
BSY and return the interrupt immediately.