Toshio Otani

US Patent:

7861049, Dec 28, 2010

Filed:

Nov 19, 2007

Appl. No.:

11/942663

Inventors:

Toshio Otani - Sunnyvale CA, US
Atsushi Murase - Sunnyvale CA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 12/00

US Classification:

711162

Abstract:

Method and apparatus are disclosed to enable secure archiving and backup of data with reduced risk of data lost. Additionally, embodiments are provided which enable reduction of costs for CAS backup of archived files by use of low-cost tape storage devices rather than expensive hard drive devices.

US Patent:

7991860, Aug 2, 2011

Filed:

Apr 7, 2008

Appl. No.:

12/099080

Inventors:

Toshio Otani - Sunnyvale CA, US

Assignee:

Hitachi, Ltd.

International Classification:

G06F 15/173
G06F 11/00

US Classification:

709221, 709220, 709223, 709226, 370216

Abstract:

In one implementation, a system includes multiple SCSI nodes configured to perform a SCSI target function. Each of the multiple SCSI nodes includes a host bus adaptor configured to connect the SCSI node with a Fiber Channel fabric. The host bus adaptor being assigned a world wide name and a network address. The system further includes a host configured to perform a SCSI initiator function. The world wide name assigned to a source host bus adaptor associated with one SCSI node is relocated to a target host bus adaptor associated with another SCSI node. After that, the network address associated with the source host bus adaptor is relocated to the target host bus adaptor. In one implementation, the system determines whether or not a network address assigned to a source host bus adaptor associated with one of the multiple SCSI nodes is shared with at least one other service. If so, the system determined whether the shared network address can be relocated to a target host bus adaptor associated with another one of the multiple of SCSI nodes. If the latter determination is in affirmative, the world wide name and network address are relocated.

US Patent:

8122212, Feb 21, 2012

Filed:

Apr 6, 2009

Appl. No.:

12/418765

Inventors:

Toshio Otani - Sunnyvale CA, US
Naoko Ichikawa - San Jose CA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 12/16

US Classification:

711162, 711112, 711114, 711206

Abstract:

Logical volume management for storage subsystem in virtual machine environment is disclosed. In one embodiment, a storage system comprises a storage subsystem including a processor, a memory, one or more virtual disks, and one or more logical disks each corresponding to a physical storage area in the storage subsystem; and a host computer connected with the storage subsystem via a network, the host computer including virtual machines running thereon, the virtual machines each being connected to at least one of the virtual disks or logical disks in the storage subsystem. In the storage subsystem, abstract disks each represent one of the virtual disks or logical disks. An abstract disk management table is stored in the memory of the storage subsystem to manage a relationship between the abstract disks and the one or more virtual disks and between the abstract disks and the one or more logical disks.

US Patent:

8166264, Apr 24, 2012

Filed:

Feb 5, 2009

Appl. No.:

12/366590

Inventors:

Toshio Otani - Sunnyvale CA, US
Yasunori Kaneda - San Jose CA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 12/00

US Classification:

711162, 711170, 711202, 711E12103

Abstract:

Systems and methods for consistent logical volume management of the storage subsystem. The present invention guarantees permanent identification data consistency while migrating, mirroring, creating, deleting LU and so on. It prevents the administrator from the change of management.

US Patent:

8260986, Sep 4, 2012

Filed:

Sep 29, 2009

Appl. No.:

12/569453

Inventors:

Hiroshi Arakawa - Sunnyvale CA, US
Toshio Otani - Sunnyvale CA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 13/00
G06F 3/00

US Classification:

710 62, 710 5, 710 8, 710 15, 710 32

Abstract:

A storage system configured to associate a virtual port to a plurality of physical ports. In response to commands from computers, the storage system manages relation between physical ports and virtual ports and relation between virtual port and volumes by performing processes such as creating a virtual port, assigning LUs to a virtual port, moving a virtual port between physical ports and deleting a virtual port. The storage system also maintains/calculates statistics information for ports and displays the information for each virtual port.

US Patent:

8281050, Oct 2, 2012

Filed:

Aug 20, 2010

Appl. No.:

12/860303

Inventors:

Toshio Otani - Sunnyvale CA, US
Gary John Pilafas - Hoffman Estates IL, US

Assignee:

Hitachi, Ltd. - Tokyo
Hitachi Data Systems Corporation - Santa Clara CA

International Classification:

G06F 3/00
G06F 13/00

US Classification:

710 29, 710 33, 710 36, 709213, 711111

Abstract:

Embodiments of the invention provide a method of storage array with frame forwarding capability to reduce the complexity of an IT platform system having a large number of hardware devices. In one embodiment, a storage system comprises one or more storage devices; a storage controller having a storage controller processor and a storage controller memory and being coupled with the one or more storage devices; an interface controller receiving an input/output command directly from a host computer; and an internal bus. The interface controller and the storage controller are coupled by the internal bus. In another embodiment, a storage system comprises one or more storage devices; a storage controller having a processor and a memory and being coupled with the one or more storage devices; and a network interface controller which provides virtual Ethernet bridging.

US Patent:

8364869, Jan 29, 2013

Filed:

Aug 21, 2012

Appl. No.:

13/590521

Inventors:

Hiroshi Arakawa - Sunnyvale CA, US
Toshio Otani - Sunnyvale CA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 3/00
G06F 13/00

US Classification:

710 62, 710 5, 710 8, 710 15, 710 32

Abstract:

A storage system configured to associate a virtual port to a plurality of physical ports. In response to commands from computers, the storage system manages relation between physical ports and virtual ports and relation between virtual port and volumes by performing processes such as creating a virtual port, assigning LUs to a virtual port, moving a virtual port between physical ports and deleting a virtual port. The storage system also maintains/calculates statistics information for ports and displays the information for each virtual port.

US Patent:

8370300, Feb 5, 2013

Filed:

May 5, 2011

Appl. No.:

13/101467

Inventors:

Toshio Otani - Bellevue WA, US

Assignee:

Hitachi, Ltd. - Tokyo

International Classification:

G06F 17/00

US Classification:

707639, 707741

Abstract:

A contents management system comprises a plurality of subsystems which include: a storage subsystem to store a plurality of objects; a contents gateway server configured to create snapshots of the objects and store the snapshots in a first snapshot layer; a system management control unit configured to determine whether the number of snapshots in the first snapshot layer exceeds a corresponding limit for the first snapshot layer and, if yes, to migrate the snapshots from the first snapshot layer to a second snapshot layer provided by another subsystem of the contents management system, and delete the migrated snapshots from the first snapshot layer; and a contents management server configured to track location changes of the snapshots of the objects during migration of the snapshots and to re-index an index data of the snapshots of the objects based on the tracked location changes.