Checking for proper locations of storage devices in a storage de

Details Checking for proper locations of storage devices in a storage de Checking for proper locations of storage devices in a storage de

1996-05-13

1998-05-12

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

39518312, 39518318, 711114, G06F 1128, G06F 1130

Patent

active

057519366

ABSTRACT:
A determination is made as to whether or not storage devices of a storage array 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 of the storage array. 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 whereby corrective action can be taken to avoid improper distribution to or reassembly of data from the logical volume.

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patent: 5325497 (1994-06-01), Jaffe et al.

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