Data processing: database and file management or data structures – Database design – Data structure types
Patent
1998-06-12
2000-09-12
Black, Thomas G.
Data processing: database and file management or data structures
Database design
Data structure types
707200, 707201, 707202, 707204, 707205, 707206, C06F 1200
Patent
active
061191310
ABSTRACT:
Information regarding volume mount points hosted by a logical volume are stored on the physical device underlying the logical volume so that the relationships between the host logical volume and target logical volumes mounted on the volume mount points can be reconstituted when the system containing the logical volumes is rebooted, when the underlying physical devices are moved with the system, and when the logical volumes are transported to a different system. A data structure stored on the physical device contains the directory name of the volume mount point and the unique identifier and a globally unique mount name of the target logical volume mounted at the volume mount point. When the target logical volume is present in the system, symbolic links are created to relate the volume mount point name to a device name for the target logical volume so that pathnames containing the directory junction name are resolved correctly. If the target volume is not present in the system, the corresponding symbolic link does not exist, so an incorrect logical volume cannot be mounted onto a volume mount point. Furthermore, because the logical volumes contain the directory junction information, the namespace representing the logical volumes is self-describing so that neither user knowledge nor intervention is required to reconstitute the namespace.
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Cabrera Luis Felipe
Kusters Norbert P.
Black Thomas G.
Microsoft Corporation
Mizrahi Diane D.
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