MATTHEW J DERRICO
Pilots at Banfill Ln, Southborough, MA

6457139, Sep 24, 2002

Dec 30, 1998

09/223126

Matthew J. DErrico - Southboro MA
Steven M. Blumenau - Holliston MA
Erez Ofer - Brookline MA

EMC Corporation - Hopkinton MA

G06F 100

714 5, 714 7, 710 10, 710 15, 710305, 710311

Method and apparatus directed to a computer system including a host computer and an intelligent storage system that stores data accessed by the host computer, the computer system including a plurality of logical volumes of data that are visible to the host computer and the storage system and that are perceived by the host computer as comprising a plurality of raw storage devices, the storage system including a plurality of physical storage devices and at least one mapping layer that maps the plurality of logical volumes to the plurality of physical storage devices so that the data in each of the plurality of logical volumes is stored on at least one of the plurality of physical storage devices. One aspect of the invention is directed to providing the host computer with information identifying, for at least one of the plurality of logical volumes, which ones of the plurality of physical storage devices store data included in the at least one of the plurality of logical volumes. The host computer can use this information in configuring data blocks among the plurality of logical volumes.

6766359, Jul 20, 2004

Dec 29, 1999

09/474476

Fred Oliveira - Sudbury MA
Matthew J. DErrico - Southborough MA
Kevin Rodgers - Derry NH

EMC Corporation - Hopkinton MA

G06F 15167

709213, 709238, 709239, 709312, 710 38, 710 39

One aspect is directed to a method and apparatus for transferring information, through a shared storage system, between first and second processes running on first and second computers, respectively. Both computers are coupled to a data storage system, with the first computer being coupled through multiple paths. In accordance with one aspect of the invention, at least one of the multiple paths is selected through which to transfer the information between the first process and the data storage system, so that communication between the first process and the shared storage system is not constrained to any particular path. Another aspect is directed to a method and apparatus for processing an out of band control command executed by a host computer in a multi-path system and targeting a device. A path is selected for transmitting the out of band control command to the device based upon a selection criteria that enables the selected path to be other than a specific target path identified by the out of band control command.

6449652, Sep 10, 2002

Jan 4, 1999

09/224789

Steven M. Blumenau - Holliston MA
Christopher J. Hackett - Boylston MA
Matthew J. DErrico - Southboro MA

EMC Corporation - Hopkinton MA

G06F 1516

709229, 711164

Method and apparatus for managing access to one of a plurality of raw storage devices in a computer system including a host computer and a storage system that is coupled to the host computer and that stores data accessed by the host computer. The computer system includes a plurality of logical volumes of data that are visible to the host computer and the storage system and are perceived by the host computer as comprising the plurality of raw storage devices. In accordance with one aspect of the invention, a request to perform an action on the one of the plurality of raw storage devices can be granted, even when the requester has less than system administrator access privileges. In accordance with another aspect of the invention, the one of the plurality of raw storage devices may have associated access privileges information. The access privileges information associated with the one of the plurality of raw storage devices may be compared with information descriptive of the requester, and the request may be granted when the access privileges information associated with the one of the plurality of raw storage devices indicates that the requester is privileged to perform the action on the one of the plurality of raw storage devices.

6434637, Aug 13, 2002

Dec 31, 1998

09/223998

Matthew J. DErrico - Southborough MA

EMC Corporation - Hopkinton MA

G06F 1314

710 38, 710 5, 710 6, 710 15, 710 36, 710 37, 711118

A method and apparatus for distributing input/output (I/O) operations among at least two paths in a multi-path computer system including a host computer, a system resource and a plurality of paths coupling the host computer to the system resource. For a next I/O operation to be assigned for transmission between the host computer and the system resource, a selection is made of one of the at least two paths for transmission of the next I/O operation based upon a state of previously assigned I/O operations queued for transmission over the at least two paths.

6341317, Jan 22, 2002

Dec 30, 1998

09/223596

Matthew J. DErrico - Southboro MA
Steven M. Blumenau - Holliston MA
Erez Ofer - Brookline MA

EMC Corporation - Hopkinton MA

G06F 1300

710 15, 710 33, 710111

A method and apparatus for managing a log of information in a computer system including a host computer and a storage system that stores data accessed by the host computer. The computer system includes a plurality of logical volumes of data that are visible to the host and the storage system and that are perceived by the host computer as comprising a plurality of raw storage devices. The storage system includes at least one physical storage device and at least one mapping layer that maps the logical volumes to the physical storage device. In one aspect of the invention, the log includes information concerning at least one I/O operation. The information includes a first component relating to aspects of the I/O operation controlled by the host computer and a second component relating to aspects of the I/O operation controlled by the storage system. In one aspect, the host computer stores the log which includes information relating to aspects of the I/O operation controlled by the intelligent storage system. In another aspect, the storage system stores the log which includes information relating to aspects of the I/O operation controlled by the host.

6542944, Apr 1, 2003

May 15, 2002

10/145932

Matthew J. DErrico - Southborough MA

EMC Corporation - Hopkinton MA

G06F 1314

710 38, 710 5, 710 6, 710 36, 710 39, 710 40, 710240, 710244

A method and apparatus for distributing input/output (I/O) operations among at least two paths in a multi-path computer system including a host computer, a system resource and a plurality of paths coupling the host computer to the system resource. For a next I/O operation to be assigned for transmission between the host computer and the system resource, a selection is made of one of the at least two paths for transmission of the next I/O operation based upon a state of previously assigned I/O operations queued for transmission over the at least two paths.

7860986, Dec 28, 2010

Oct 24, 2005

11/257223

Steven M. Blumenau - Holliston MA, US
Christopher Hackett - Boylston MA, US
Matthew Derrico - Southboro MA, US

EMC Corporation - Hopkinton MA

G06F 15/177

709229, 709216, 709246

Method and apparatus for managing access to a plurality of volumes of storage in a computer system including a host computer. The host computer includes an application layer that includes at least one application program. The application layer is presented with the plurality of volumes of storage that are visible to the application layer. The method of managing access to at least one of the plurality of volumes of storage includes assigning limited access privileges to the application program to access the plurality of volumes of storage. The limited access privileges are less than root access privileges and the at least one of the plurality of volumes of storage is mapped indirectly to one or more physical storage devices so that the at least one of the plurality of volumes of storage does not correspond directly to an actual physical storage device.