Array storage system for returning an I/O complete signal to a virtual I/O daemon that is separated from software array driver and physical device driver
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United States of America Patent
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Jan 28, 1997
Grant Date -
N/A
app pub date -
Jun 11, 1993
filing date -
Jun 11, 1993
priority date (Note) -
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Abstract
A scalable software architecture, for optimal performance on a RAID level 1, 3, 4 and 5 disk array or tape array. The software architecture consists of a software device driver and one or more driver daemon processes to control I/O requests to the arrays. Implemented in a UNIX or NetWare operating environment, this architecture provides a transparent interface to the kernels I/O subsystem, physical device drivers and system applications. The array driver and I/O daemon can be run on a uni-processor or multi-processor system platform to optimize job control, error recovery, data recreation, parity generation and asynchronous writes.
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