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Switching control in a fault tolerant system

  • US 5,822,512 A
  • Filed: 06/05/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 05/19/1995
  • Status: Expired due to Term
First Claim
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1. A method of switching control from a first server to a second server in a fault tolerant system, the first and second servers coupled to respective first and second slots on an expansion bus of an expansion box, the method comprising:

  • providing an indication to the second server of the activity state of the first server; and

    disabling communication between the first server and the expansion bus by disconnecting the first server from the first slot if the indication indicates that the first server is inactive; and

    enabling communication between the second server and the expansion bus by connecting the second server to the second slot if the indication indicates that the first server is inactive.

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