Operation
35
Table 7. Switches and indicators
Switch or Indicator
Function
Power supply
On/standby switch
Applies DC operating voltages to the drive electronics and
(on/
)
power supply fan when placed in the on ( l ) position.
Drive control board
Ready LED
This LED flashes during the power on sequence until the
(green)
discs are up to speed and the heads are loaded.
It is on steady with power on complete, assuming that
there are no fault conditions.
It flashes during a power off sequence. This occurs when
the drive receives a Start/Stop Unit command after it has
once been started.
Heartbeat LED
This LED blinks when the SCSI controller is operating
(green)
properly.
If the LED is constantly on or off, it indicates one of two
things:
• The SCSI controller is not functioning properly.
• The SCSI controller is executing diagnostics and
should be ready in a few seconds.
Active LED
This LED socket is provided for units which do not use
(socket)
the optional bezel. When the active LED is inserted into
this socket, it indicates SCSI command activity.
When it is on, the drive is executing a SCSI command.
When it is off, the drive does not have a SCSI command
to execute.
Optional bezel on drive
Active LED
This LED indicates command activity by the drive.
(color unspecified)
When it is on, the drive is executing a SCSI command.
When it is off, the drive does not have a SCSI command
to execute.
Summary of Contents for Elite ST43400N
Page 1: ...Elite Disc Drive ST43400N ND User s Manual...
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Page 48: ...Maintenance 43...
