DLT7000 Status Light Action During Power-On Self Test and Operation


DLT7000 Status Light Action During Power-On Self Test and Operation

When power is applied to the DLT7000 tape drive, it performs POST.
POST completes in about 15 seconds and the DL~000 tape drive responds normally to all commands; however, it might take longer for the media to become ready.
After a bus reset, the tape drive responds within a bus selection time-out period.

The sequence of events for POST is:

  1.  The lights on the top of the DLT7000 tape drive front panel turn on sequentially  from left to right. All lights stay on for a few seconds.
  2.  The lights on the bottom of the DLT7000 tape drive front panel turn on at the  same time for about three seconds and then turn off.
  3.  The Operate Handle, Write Protected, and the Use Cleaning Tape lights turn off.
     The Tape in Use light blinks while the tape drive initializes.
  4.  After initialization, the drive is in one of the following conditions:

 ---------------------------------------------------------------------------------------------------------------
  Condition of the Tape Drive                       | Condition of the Status Lights on the Drive and
                                                    | Actions Required
 ---------------------------------------------------|-----------------------------------------------------------
  No cartridge is present, and the handle is closed.| 1. The Tape in Use light turns off.
                                                    | 2. The Operate Handle light turns on.
                                                    | 3. The drive unlatches the handle.
                                                    | 4. The drive beeps momentarily. The handle can be
                                                    |    opened and a cartridge inserted.
 ---------------------------------------------------|-----------------------------------------------------------
  A cartridge is present and the handle is closed.  | The drive loads the cartridge. When the Tape in Use
                                                    | light stops blinking and stays on, the tape's actual
                                                    | density light comes on. For example, if the actual tape
                                                    | density is 20.0 GB, then the light turns on next to the
                                                    | 20.0 label. When the Density Override light blinks, you
                                                    | can select a density. The drive is ready for use.
                                                    |
                                                    | Note: The manual Density Override function is not
                                                    | normally used in a library application; typically,
                                                    | the host system controls this function.
 ---------------------------------------------------|-----------------------------------------------------------
  A cartridge is present, but the handle is open    | The Tape in Use light turns off. The Operate Handle
  (not recommended)                                 | light flashes. When the handle is lowered, the
                                                    | cartridge loads.
 ---------------------------------------------------|-----------------------------------------------------------
  The tape drive detects an error condition.        | The top or bottom lights blink repeatedly. Try to unload
                                                    | the tape and reinitialize the drive by pressing the
                                                    | Unload button, or turn the power to the library off and
                                                    | then on again. The top or bottom lights stop blinking
                                                    | and the drive tries to reinitialize. The lights turn on
                                                    | steady again and, if the test succeeds, turn off.
 ---------------------------------------------------|-----------------------------------------------------------
  The tape drive is powered on with the handle open.| The Operate Handle light flashes. Close the handle
                                                    | and wait for the light to become steady.
 ---------------------------------------------------------------------------------------------------------------


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