×

Redundant storage with mirroring by logical volume with diverse reading process

  • US 5,987,566 A
  • Filed: 10/06/1998
  • Issued: 11/16/1999
  • Est. Priority Date: 05/24/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A mirrored memory system for retrieving data in response to a read command comprising:

  • (A) at least a pair of mirroring physical storage devices for storing mirrored copies of related data organized as at least one logical volume, each read command designating a logical volume from which data is to be retrieved,(B) a reading process module with at least one reading process by which data can be transferred in response to a read command,(C) a correspondency that assigns to each logical volume the reading process by which data is to be read from said mirroring physical storage devices storing each logical volume, and(D) a data transfer control module operable in response to said correspondency and said reading process module and connected to said mirroring physical storage devices, said control module responding to a logical volume identification in a read command and the assignment from said correspondency by enabling the transfer of data from one of said mirroring physical storage devices containing the identified logical volume according to the assigned reading process.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×