Seagate Elite 9 User Manual download pdf (Page 40)

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.

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Seagate Elite 9 User Manual Page 40