NEC T30A - Drive Sled Ingicator; Table 1-5 Drive Sled Ingicator

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1.3.6 Drive Sled Ingicator
These indicate the states of the drive.
Table 1-5 Drive Sled ingicator
LED indicating the status and maintenance requirements
On ：Maintenance request status.
Off ：normal.
LED indicating the status of power supply
On ：Power is supplied.
Off ：Power is not supplied.
LED indicates the communication status to the library
On ：Recognized from the library.
Blinking ：Data transfer.
Off ：Not recognized from the library.
LED indicating the status of the cartridge
On ：Cartridge exist.
Off ：No cartridge.
LED indicating the connection status with host.
On ：Connected to the host.
Blinking ：Data transfer or initializing state.
Off ：Port closed or disconnected to the host.