Speicherplattenanordnung und Verfahren zur Bestimmung des Vorhandenseins korrekter Speichervorrichtungen

摘要

A determination is made as to whether or not storage devices (24a ... 24j) of a storage array (14) are positioned in their proper physical locations in the array. To make the determination, a device identifier for each of the storage devices is utilized, together with a generated logical identifier. In a preferred embodiment, the device identifier is the serial number for the storage device and the logical identifier includes a combination of all the device identifiers for a particular logical volume (40) of the storage array (14). Preferably, the logical identifier also includes system status information for use in enhancing fault tolerance. The logical identifier is written or updated upon the occurrence of predetermined events or conditions. Using the device identifiers and the logical identifier, an indication can be provided whenever the proper storage devices are not found in the logical volume (40) whereby corrective action can be taken to avoid improper distribution to or reassembly of data from the logical volume.