公开(公告)号：DE69921289D1

公开(公告)日：2004-11-25

申请号：DE69921289

申请日：1999-08-16

Applicant: EMC CORP

Inventor： BACHMAT EITAN ,  OFEK YUVAL

IPC: G06F3/06 ,  G06F11/34 ,  G06F12/00 ,  G11B17/22

Abstract: Load balancing of activities on physical disk storage devices is accomplished by monitoring reading and writing operations to blocks of contiguous storage locations on the physical disk storage devices. A list of exchangeable pairs of blocks is developed based on size and function. Statistics accumulated over an interval are then used to obtain access activity values for each block and each physical disk drive. A statistical analysis leads to a selection of one block pair. After testing to determine any adverse effect of making that change, the exchange is made to more evenly distribute the loading on individual physical disk storage devices.

公开(公告)号：GB2366425B

公开(公告)日：2004-11-10

申请号：GB0108069

申请日：2001-03-30

Applicant: EMC CORP

Inventor： OFEK YUVAL ,  BLACK DAVID L ,  MACARTHUR STEPHEN D ,  WHEELER RICHARD ,  THIBAULT ROBERT

IPC: G06F3/06 ,  G06F11/20 ,  G06F12/08 ,  G06F13/00 ,  G06F13/10 ,  G06F13/36

公开(公告)号：DE69710578D1

公开(公告)日：2002-03-28

申请号：DE69710578

申请日：1997-05-29

Applicant: EMC CORP

Inventor： OFEK YUVAL

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/14 ,  G06F11/20 ,  G06F13/00

Abstract: A data network with data storage facilities for providing redundant data storage and for enabling concurrent access to the data for multiple purposes. A first data processing system with a first data facility stores a data base and processes transactions or other priority applications. A second data storage facility, that may be physically separated from the first data storage facility, mirrors the data in the first data storage facility. In a concurrent access operating mode, the second data storage facility makes the data available to an application concurrently with, but independently of, the operation of the other application. On completion of the concurrent operation, the second data storage facility can reconnect with and synchronizes with the first data storage facility thereby to reestablish the mirroring operation.

公开(公告)号：DE19982999T1

公开(公告)日：2001-08-09

申请号：DE19982999

申请日：1999-12-13

Applicant: EMC CORP

Inventor： OFEK YUVAL ,  CAKELJIC ZORAN ,  BITNER HAIM ,  GALTZUR SHARON ,  ISH-SHALOM ARIEL ,  KEDEM NADAV ,  KRIKLER SAMUEL ,  ARNON DAN

IPC: G06F3/00 ,  G06F3/06 ,  G06F11/14 ,  G06F12/00 ,  G06F17/00

Abstract: Method and apparatus are disclosed for a computer system including host computers and storage elements. The host computers may be configured into a host domain and the storage elements configured into a storage domain. The storage domain includes a plurality of primary storage devices and a secondary storage device. The secondary storage device may be coupled to a plurality of the primary storage devices through a network. In another embodiment, the secondary storage device may send and receive information from a heterogeneous set of host computers. In another embodiment, connections for transfer of data onto the secondary storage element are created automatically.

公开(公告)号：DE19982999B4

公开(公告)日：2008-11-06

申请号：DE19982999

申请日：1999-12-13

Applicant: EMC CORP

Inventor： OFEK YUVAL ,  CAKELJIC ZORAN ,  BITNER HAIM ,  GALTZUR SHARON ,  ISH-SHALOM ARIEL ,  KEDEM NADAV ,  KRIKLER SAMUEL ,  ARNON DAN

IPC: G06F3/00 ,  G06F12/16 ,  G06F3/06 ,  G06F11/14 ,  G06F12/00

Abstract: Method and apparatus are disclosed for a computer system including host computers and storage elements. The host computers may be configured into a host domain and the storage elements configured into a storage domain. The storage domain includes a plurality of primary storage devices and a secondary storage device. The secondary storage device may be coupled to a plurality of the primary storage devices through a network. In another embodiment, the secondary storage device may send and receive information from a heterogeneous set of host computers. In another embodiment, connections for transfer of data onto the secondary storage element are created automatically.

公开(公告)号：DE04028359T1

公开(公告)日：2006-06-22

申请号：DE04028359

申请日：2000-09-01

Applicant: EMC CORP

Inventor： ARNON DAN ,  OFEK YUVAL ,  LECRONE E

IPC: G06F3/06 ,  G06F11/14 ,  G06F11/20 ,  G06F12/00 ,  G06F13/00

公开(公告)号：GB2348994B

公开(公告)日：2004-02-04

申请号：GB0019609

申请日：1999-12-13

Applicant: EMC CORP

Inventor： KRIKLER SAMUEL ,  ARNON DAN ,  OFEK YUVAL ,  CAKELJIC ZORAN ,  BITNER HAIM ,  GALTZUR SHARON ,  ISH-SHALOM ARIEL J ,  KEDEM NADAV

IPC: G06F3/00 ,  G06F3/06 ,  G06F11/14 ,  G06F12/00 ,  G06F17/00

Abstract: Method and apparatus are disclosed for a computer system including host computers and storage elements. The host computers may be configured into a host domain and the storage elements configured into a storage domain. The storage domain includes a plurality of primary storage devices and a secondary storage device. The secondary storage device may be coupled to a plurality of the primary storage devices through a network. In another embodiment, the secondary storage device may send and receive information from a heterogeneous set of host computers. In another embodiment, connections for transfer of data onto the secondary storage element are created automatically.

公开(公告)号：DE69622253T2

公开(公告)日：2003-02-13

申请号：DE69622253

申请日：1996-08-29

Applicant: EMC CORP

Inventor： OFEK YUVAL ,  YANAI MOSHE

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/14 ,  G06F12/06 ,  G06F12/08 ,  G11B5/86 ,  G11B19/02 ,  G06F13/00

公开(公告)号：DE10116360A1

公开(公告)日：2001-10-25

申请号：DE10116360

申请日：2001-04-02

Applicant: EMC CORP HOPKINTON

Inventor： BLACK DAVID L ,  WHEELER RICHARD ,  THIBAULT ROBERT ,  MACARTHUR STEPHEN D ,  OFEK YUVAL

IPC: G06F13/00 ,  G06F3/06 ,  G06F11/20 ,  G06F12/08 ,  G06F13/36

Abstract: The data memory system has a host computer server (120) that transfers information to a number of disc drives (140) via a system interface (160) that is based around a cache memory (220). The interconnection is made via front and back control units (180,200) that receive inputs from cross over switching stages (260).This provides redundancy to protect against failure.

公开(公告)号：GB2348994A

公开(公告)日：2000-10-18

申请号：GB0019609

申请日：1999-12-13

Applicant: EMC CORP

Inventor： KRIKLER SAMUEL ,  ARNON DAN ,  OFEK YUVAL ,  CAKELJIC ZORAN ,  BITNER HAIM ,  GALTZUR SHARON ,  ISH-SHALOM ARIEL J ,  KEDEM NADAV

IPC: G06F3/00 ,  G06F3/06 ,  G06F11/14 ,  G06F12/00 ,  G06F17/00

Abstract: Method and apparatus are disclosed for a computer system including host computers and storage elements. The host computers may he configured into a host domain and the storage elements configured into a storage domain. The storage domain includes a plurality of primary storage devices and a secondary storage device. The secondary storage device may be coupled to a plurality of the primary storage devices through a network. In another embodiment, the secondary storage device may send and receive information from a heterogeneous set of host computers. In another embodiment, connections for transfer of data onto the secondary storage element are created automatically.