Susan C Nagy

US Patent:

6895418, May 17, 2005

Filed:

Apr 28, 1999

Appl. No.:

09/301057

Inventors:

Preston F. Crow - Ashland MA, US
Steven T. McClure - Northboro MA, US
Susan C. Nagy - Waltham MA, US
Richard G. Wheeler - Belmont MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F012/00

US Classification:

707205, 707 1, 707 3

Abstract:

A memory storage device has a file storage operating system that uses inodes to access file segments. Each inode has a plurality of rows. A portion of the rows can store extents pointing, directly or indirectly, to data blocks. Each extent has a field to indicate whether the extent is an indirect extent or a direct extent.

US Patent:

7085781, Aug 1, 2006

Filed:

Nov 24, 2003

Appl. No.:

10/720629

Inventors:

Preston F. Crow - Ashland MA, US
Steven T. McClure - Northboro MA, US
Susan C. Nagy - Waltham MA, US
Richard G. Wheeler - Belmont MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 17/30

US Classification:

707201, 707202, 707203, 709217

Abstract:

A memory storage device has a file storage operating system which uses an inode to record and find segments of each data file. The inode includes a plurality of rows. A portion of the rows are written with direct extents pointing to data blocks storing portions of file segments. At least two of the extents point to data blocks having addresses in different logical volumes.

US Patent:

20040254907, Dec 16, 2004

Filed:

Aug 20, 2003

Appl. No.:

10/644458

Inventors:

Preston Crow - Ashland MA, US
Robert Mason - Mendon MA, US
Steven McClure - Northboro MA, US
Susan Nagy - Waltham MA, US
Richard Wheeler - Belmont MA, US

International Classification:

G06F007/00

US Classification:

707/001000

Abstract:

A memory storage device has a file storage operating system that uses inodes to access file segments. Each inode has a plurality of rows. A portion of the rows can store extents pointing, directly or indirectly, to data blocks. Each extent has a field to indicate whether the extent is an indirect extent or a direct extent.

US Patent:

6654772, Nov 25, 2003

Filed:

Apr 28, 1999

Appl. No.:

09/301177

Inventors:

Preston F. Crow - Ashland MA
Steven T. McClure - Northboro MA
Susan C. Nagy - Waltham MA
Richard G. Wheeler - Belmont MA

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 1730

US Classification:

707205, 707 2, 707 10, 707100, 707101

Abstract:

A memory storage device has a file storage operating system which uses an inode to record and find segments of each data file. The inode includes a plurality of rows. A portion of the rows are written with direct extents pointing to data blocks storing portions of file segments. At least two of the extents point to data blocks having addresses in different logical volumes.