Method and apparatus for providing redundant paths to a storage volume
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United States of America Patent
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Mar 17, 2015
Grant Date -
N/A
app pub date -
Apr 26, 2004
filing date -
Apr 26, 2004
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Abstract
A method and apparatus for providing a multipathing connection to a storage volume, where in one embodiment, the invention prohibits the disk driver from reading the storage parameter information (e.g., table of contents) upon initialization. The method commences with a multipathing disk driver determining at least on active port and at least on passive port for the storage volume. The disk driver then sends a request via the active port to the storage volume for the storage parameter information that is contained in the disk array. After the host computer's operating system disk driver receives the storage parameter information, it copies the information and distributes the information to the port definitions for the passive ports. Consequently, the ports are defined without causing a failover within the storage volume.
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