Storage system

摘要

A host I/F unit has a management table for managing an MPPK which is in-charge of the control of input/output processing for a storage area of an LDEV, and if a host computer transmits an input/output request for the LDEV, the host I/F unit transfers the input/output request to the MPPK which is in-charge of the input/output processing for the LDEV based on the management table, an MP of the MPPK performs the input/output processing based on the input/output request, and the MP of the MPPK also judges whether the MPPK that is in-charge of the input/output processing for the LDEV is to be changed, and sets the management table so that an MPPK which is different from the MPPK that is in-charge is to be in-charge of the input/output processing for the LDEV.

主权项

1. A storage system coupled to a host computer, comprising:
a management computer; a plurality of storage devices that are provided as a plurality of logical storage devices to the host computer; a plurality of interface packages, each of the plurality of interface packages coupled to the management computer and comprising at least one interface unit; a shared memory that stores control information for the plurality of logical storage devices, said control information including ownership information for the logical storage devices; a plurality of micro-processor packages, each of the plurality of micro-processor packages comprising at least one micro-processor; wherein each interface unit comprises management information for managing the plurality of micro-processor packages, said micro-processor package in-charge of controlling input/output processing for the storage area of the logical storage devices, and
a process that transfers an input/output request to a micro-processor package that is in-charge of the input/output processing for a logical storage device based on the management information when the input/output request for the logical storage device is received from the host computer; wherein each of the plurality of micro-processor packages: (1) receives a request for changing ownership from a first micro-processor package, which is in charge of a logical storage device whose load is higher than other logical storage devices, to a second micro-processor package whose load is lower than other micro-processor packages; and (2) sets the management information and the control information such that the second micro-processor package is in charge of a logical storage device which the first micro-processor package was in charge of; and wherein the management computer:
(1) receives a request for changing an interface package;(2) requests the micro-processor package, to delete at least one path definition between the logical storage devices and interface units being replaced;(3) confirms a replacement of interface package; and(4) requests to the micro-processor package, to set the path definition between the logical storage devices and interface units of new interface package.