Data storage system employing virtual disk enclosure

Details Data storage system employing virtual disk enclosure Data storage system employing virtual disk enclosure

2006-01-03

2009-12-08

Kim, Matt (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S118000, C714S005110

Reexamination Certificate

active

07631143

ABSTRACT:
A data storage system employs a virtual disk enclosure that utilizes a number of physical disk drives to create a set of virtual disk drives that are visible to the remainder of the storage system. The virtual disk drives exhibit a set of characteristics such as respective storage capacities, access times, and reliability measures that are user-selectable within respective limits determined by the set of corresponding physical disk drive characteristics. For example, a RAID protection scheme can be used such that the overall storage capacity of the virtual disk drives is less than that of the physical disk drives, but has greater overall reliability/availability. The system may utilize a recursive protection scheme in which the virtual disk drives are utilized according to a second RAID configuration to provide a set of highly available logical storage volumes to host computer systems connected to the data storage system. The virtual disk enclosure preferably includes redundant components for enhanced system availability.

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