International Business Machines Corporation

Muthu A Muthiah

Dhaval Kiritbhai Shah

Gaurav Chhaunker

Ganesh Sivaperuman

Robert Beverley Basham

Andrew Gary Hourselt

Vipul Srivistava

Physical storage devices are configured as a redundant array of independent disks (RAID). As such, storage space of the physical storage devices is allocated to the RAID, and each physical storage device is part of the RAID. Where a portion of the storage space of the physical storage devices is not allocated to the RAID, this portion of the storage space is configured so that it is usable and is not wasted.

Using unused portion of the storage space of physical storage devices configured as a RAID

Physical storage devices are configured as a redundant array of independent disks (RAID). As such, storage space of the physical storage devices is allocated to the RAID, and each physical storage device is part of the RAID. Where a portion of the storage space of the physical storage devices is not allocated to the RAID, this portion of the storage space from a mixed drive capacity is configured so that it is usable and is not wasted.

A method and apparatus are provided for maintaining cache coherency of object management data in a computer system. The computer system is configured with a bit mask to represent changes in object management data. All changes in an object are reflected by setting an associated bit in the bit mask. A cache update of object management data is limited to the bit(s) set in the bit mask.

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Beaverton, OR, United States of America

Muthu A Muthiah