Command Processing
116 C141-C013
Table 2.7 LED display
Mode Page 19 Ready LED Meaning
0 1
Active state (power
condition)
a) On when a command
is not being executed.
b) Flashes when a
command is being
executed (50 ms/ON,
50 ms/OFF).
Active_Wait or Stopped
state (power condition)
a) Off when a command
is not being executed.
b) Flashes when a
command is being
executed (50 ms/ON,
50 ms/OFF).
a) Off when a command
is not being executed.
b) Flashes when a
command is being
executed (50 ms/ON,
50 ms/OFF).
Motor being started or
stopped (*1) Flashes (0.5 s/ON, 0.5 s/OFF)
Formatting in progress (*1) Flashes (1.0 s/ON, 1.0 s/OFF)
*1) These display items take priority over display items caused by power
conditions. Even if a command is received while "Motor being started or
stopped," or "Formatting in progress" is displayed, the LED display stays
unchanged.
2.8 Command Processing Exceptions 2.8.1 Overlapped tag
The HDD recognizes that commands and tasks have been overlapped when it
receives a command or task with the same tag from the same INIT as a command
being executed or held in its queue, and abnormally terminates command or task
processing.
The execution of a command or task ends when the TARG reports RESPONSE to
the INIT. The execution of a command is also terminated with ABORT TASK,
ABORT TASK SET, CLEAR TASK SET, LOGICAL UNIT RESET or HARD
RESET.