Mti Technology Corporation

Netapp, Inc.

Network Appliance, Inc.

Rush C Manbert

Chandra Prasad

Dipam Patel

David D Perry

A method and system for provisioning storage from a storage area network is provided. The provisioning includes receiving a request for a storage size and storage configuration from a storage area network according to a storage profile, identifying a storage device pool of storage devices according to a storage device candidate strategy, selecting a media unit provisioning strategy based upon the type of storage configuration specified in the storage request, generating media unit solutions using the media unit provisioning strategy and sequence of storage devices in the storage pool, determining if the media unit provisioning strategy produced a solution for the requested storage configuration and provisioning a media unit solution in response to the determination.

Method and system for strategy driven provisioning of storage in a storage area network

A Read-Modify-Write operation in a RAID system is done by separating the writing of new data and the writing of new parity, so that they are not done in parallel. This allows recovery to be performed at all stages, without requiring the excessive use of non-volatile cache, and minimizing the amount of time a span has to be locked. The invention accomplishes this by allowing one of the recoveries to be a recovery to the old data, before the write, with a signal to the host that the write operation failed in such a recovery situation, requiring the host to resend the data. This speeds up the entire operation while minimizing the use of resources while only requiring that in the rare instances of a failure during a particular part of the Read-Modify-Write, the host needs to resend the data.

Recovery system for raid write

An improved method and apparatus for providing I/O operations. In particular, a particular I/O operation is programmed as a net in a matrix format. Upon initialization of the I/O subsystem, an intermediate representation of the net in matrix format is created. Subsequently, upon a running of the net operation, a complete version of the net matrix is created.

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San Jose, CA, United States of America

Rush C Manbert