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Power ON Retry Function for Remote Power Controller

IP.com Disclosure Number: IPCOM000114721D
Original Publication Date: 1995-Jan-01
Included in the Prior Art Database: 2005-Mar-29
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Asami, T: AUTHOR [+4]

Abstract

Disclosed is a power controller which has power on retry functions. After power on, the power controller supervises and monitors target system's software initialization status. If the target system fails to complete initialization in a certain period of time, the power controller automatically "power OFF and ON" the target system to restart system initialization.

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Power ON Retry Function for Remote Power Controller

      Disclosed is a power controller which has power on retry
functions.  After power on, the power controller supervises and
monitors target system's software initialization status.  If the
target system fails to complete initialization in a certain period of
time, the power controller automatically "power OFF and ON" the
target system to restart system initialization.

Typical power on sequence is describes below:
  1.  Power controller "power ON" the target system.
  2.  Let the target system start IPL(Initial Program Load).
  3.  Power controller waits "system ready" message from the target
       system.
  4.  If predefined time expires before receiving "system ready"
       message, "power OFF and ON" the target system to let them
start
       IPL again.

      Using the technique of this disclosure, intermittent
hardware/software trouble, especially power on time, will not be the
reason of system down.  The number of retry, the time interval from
one retry to another, and the final power status (ON or OFF) after
expiration of retry counts may be set.

      The way to send "system ready" message or signal may be
implemented by any hardware such as parallel signal line, serial
communication line, or local area network, etc.