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Methods for controlling storage devices controlling apparatuses

  • US 20040153740A1
  • Filed: 08/26/2003
  • Published: 08/05/2004
  • Est. Priority Date: 01/31/2003
  • Status: Active Grant
First Claim
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1. A storage device controller comprising:

  • channel control portions each including a circuit board on which a file access processing portion for receiving file-by-file data input/output requests sent from information processors and an I/O processor for outputting I/O requests corresponding to said data input/output requests to storage devices are formed, said channel control portions being classified into groups for the sake of fail-over; and

    a processing portion for deciding that data updated by each of said channel control portions and handed over at the time of said fail-over are stored in a shared volume which is a storage region logically set on physical storage regions provided by said storage devices and which can be accessed commonly by any other channel control portion belonging to the same group as said channel control portion updating said data.

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