×

Method and apparatus for controlling reconfiguration of storage-device memory areas

  • US 5,684,974 A
  • Filed: 03/13/1995
  • Issued: 11/04/1997
  • Est. Priority Date: 03/17/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of controlling reconfiguration of a physical storage area of a real storage device included in an information processing apparatus having said real storage device, and a plurality of virtual computers operating on a central processing unit, wherein said physical storage area is logically divided into a plurality of storage segments to be allocated to a plurality of logical memories each employed in one of said virtual computers operating on said central processing unit, and an address reconfiguration array which includes a plurality of storage blocks each being assigned to one of said virtual computers and having its logical memory divided into a plurality of logical storage areas according to a high-order portion of logical addresses thereof, wherein each of said storage blocks is composed of a plurality of host real-address entries each being assigned to one of said logical storage areas and used for storing a high-order part of a start address of one of said storage segments of said physical storage area, said method comprising the steps of:

  • selecting a storage block from said address reconfiguration array in accordance with an identifier of a virtual computer, said identifier being issued by said virtual computer;

    selecting one of said host real-address entries from the selected storage block in accordance with said high-order portion of a logical address specified by said virtual computer which issued said identifier; and

    generating a real address of said real storage device by reading out said high-order part of a start address of one of said storage segments from the selected host real-address entry, and merging said high-order part of said start address of one of said storage segments with a remaining low-order portion of said logical address to create said real address of said storage segment of said real storage device.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×