COMPUTER SYSTEM AND METHOD FOR MIGRATING VOLUME IN COMPUTER SYSTEM

摘要

The present invention relates to migrating volumes among computers in a computer system. According to the migration method of the present invention, a setting of a storage apparatus is changed so that the volume having been used by the migration source host is accessible by the migration destination host, and then a volume recognition process is performed in the migration destination host. As a result of the volume recognition process, if it is detected in the migration destination host that multiple device files are created in a duplicated manner with respect to a single volume provided by the storage apparatus, the migration destination host deletes the device files created in a duplicated manner leaving one device file.

主权项

1. A computer system comprising a migration source computer, a migration destination computer, and a storage apparatus connected to the migration source computer and/or the migration destination computer via a network and providing one or more volumes to the migration source computer and/or the migration destination computer: wherein
the migration destination computer has multiple host bus adaptors (HBAs) for connecting to the storage apparatus; the migration destination computer acquires, for each of the multiple host bus adaptors, a number of volumes accessible via the host bus adaptor; thereafter detects the volume of the storage apparatus which has been used by the migration source computer; creates one or more device files associated with the volume and used by the migration destination computer to access the volume of the storage apparatus which has been used by the migration source computer; and when multiple device files corresponding to one of the volumes are created, leaves one device file associated with the host bus adaptor where the acquired number of volumes accessible via the host bus adaptor is 0 out of the multiple device files created corresponding to the volume and deletes the other device files.