Abstract: A liquid in pipeline and liquid level detection and warning system and some of its applications are provided. The liquid in pipeline and liquid level detection and warning system is incorporated into a liquid delivery unit. The liquid delivery unit includes a pipeline serially linking a liquid tank, a buffer tank and liquid outlet element. A drainage unit is also positioned under the outlet element for collecting redundant liquid. The warning and detection system includes a liquid in pipeline warning system and a liquid level warning system. The liquid in pipeline warning system has a first liquid in pipeline sensor installed on the pipeline between the buffer tank and the outlet element and a second liquid in pipeline sensor installed on the pipeline between the liquid tank and the buffer tank. The liquid level warning system has a first and a second liquid level sensor installed on the drainage unit such that the second liquid level sensor is positioned below the first liquid level sensor.

Abstract: Techniques for a computer system to automatically detect the type of hard disk drive installed in the system even if the hard disk drive has been replaced or upgraded. A method includes retrieving data from a partition table and calculating the necessary parameters from the values in the partition table. In a specific embodiment, the method includes calculating a HEAD parameter and a SECTORS/TRACK parameter from certain addresses stored in the partition table. The method further includes sending an IDENTIFY DRIVE (ID) command to the hard disk drive. Some types of hard disk drive communicate additional information in response to the ID command. The method includes calculating a CYLINDER parameter, using such additional information, if provided. Otherwise, the CYLINDER parameter is calculated from information in the partition table.