Compaq Computer Corporation, Inc.

Rene Richard Gaudet

John S Lacombe

Robert E Van Cleve

Peter M Yee

A nonintrusive monitoring system is used to determine the onset and duration times of an electrical power outage-caused down condition of a computer without requiring a pre-power outage polling of a running component of the computer and thereby degrading computer system performance. In response to a supply power outage the monitoring system switches on a battery-powered counter device, representatively a digital counter or a real time clock, and then switches the counter device back off in response to resumption of power supply to the computer. A software portion of the monitoring system then detects the count value of the counter device, and utilizes the count value to compute the onset and duration times of the previous power outage. Using an alternative nonintrusive technique, the monitoring system permits the counter device to run during power supply to the computer, while using the computer system clock to generate periodic time stamps, and disables the counter device during computer supply power outages. Upon resumption of supply power to the computer, the monitoring system compares the time stamp information to the count value to determine the onset and duration times of the previous supply power outage.

Nonintrusive monitoring of a computer system's downtime due to a supply

A computer system and method for allowing access to system partitions while an operating system is operational are disclosed. The system partitions are mounted by the operating system as logical drives so that the system partitions can be accessed as any other logical drive. In one embodiment, a method for accessing a special partition on at least one of a plurality of physical disks associated with a computer system running an operating system includes the operations of identifying a designated disk from the plurality of physical disks, each of the physical disks having a partition table associated therewith, and determining whether there is a special partition on the designated disk. The method further includes identifying the partition table associated with the designated disk when it is determined that the special partition is on the designated disk, and modifying a partition type in the partition table associated with the designated disk when it is determined that the special partition is on the designated disk.

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Cypress, TX, United States of America

Rene Richard Gaudet