Abstract: A first node is configured to connect a second node to form a node group, wherein the first node and the second node have a first datum and a second datum respectively, the first datum has the same content as the second datum, and the first node includes a storage device and a server. The server is configured to electrically connect the storage device and has a processor including a Linux program arbiter communicating with the second node, wherein the Linux program arbiter includes a permitting unit and a write-protection unit. The permitting unit is configured to allow a first request when receiving the first request for overwriting the first datum, and the write-protection unit is configured to prevent the second node from overwriting the second datum before the first datum is overwritten by a third datum and the second node replaces the second datum with the third datum.

Abstract: A first node is configured to connect a second node to form a node group, wherein the first node and the second node have a first datum and a second datum respectively, the first datum has the same content as the second datum, and the first node includes a storage device and a server. The server is configured to electrically connect the storage device and has a processor including a Linux program arbiter communicating with the second node, wherein the Linux program arbiter includes a permitting unit and a write-protection unit. The permitting unit is configured to allow a first request when receiving the first request for overwriting the first datum, and the write-protection unit is configured to prevent the second node from overwriting the second datum before the first datum is overwritten by a third datum and the second node replaces the second datum with the third datum.

Abstract: A method of site isolation protection includes the following steps. A set of clustered engines including a first engine at a first site and a second engine at a second site is provided. A Fiber Channel (FC) connection and an Ethernet connection between the first and the second sites are provided. Whether an Ethernet Heartbeat (EH) from one of the first engine and the second engine through the Ethernet connection exists is detected when the FC connection fails. One of the first engine and the second engine is shut down when the EH exists. Furthermore, a quorum service at a client site is provided in different IP domain to further protect site isolation from happening, while the FC connection and Ethernet Heartbeat connection failed at the same time.

Abstract: A method of site isolation protection includes the following steps. A set of clustered engines including a first engine at a first site and a second engine at a second site is provided. A Fiber Channel (FC) connection and an Ethernet connection between the first and the second sites are provided. Whether an Ethernet Heartbeat (EH) from one of the first engine and the second engine through the Ethernet connection exists is detected when the FC connection fails. One of the first engine and the second engine is shut down when the EH exists. Furthermore, a quorum service at a client site is provided in different IP domain to further protect site isolation from happening, while the FC connection and Ethernet Heartbeat connection failed at the same time.

Abstract: The storage proxy method is used in a storage area network (SAN) which includes a server, a SAN device coupled to the server, and a first and a second storage systems coupled to the SAN device and their logic units mirrored with each other to form a combined mirrored logical unit. The storage proxy method includes the following steps. One of the logical units of the storage systems as a proxy logical unit is selected. The mirrored logical unit is simulated as a virtual logical unit in the SAN device, wherein the virtual logical unit has a virtual identity the same as the identity of the selected proxy logical unit. A transparent communication for management functions between the server and the proxy logical unit is provided via the virtual logical unit or a special proxy logical unit.

Abstract: The present invention discloses an availability device, a storage area networks (SAN) system with the availability device and methods for operating thereof. The SAN system with the availability device allows for topology changes in the SAN system due to regular maintenance and/or any unexpected component degradation event without disturbing the accessibility and availability of the data in the SAN system.

Abstract: The storage proxy method is used in a storage area network (SAN) which includes a server, a SAN device coupled to the server, and a first and a second storage systems coupled to the SAN device and their logic units mirrored with each other to form a combined mirrored logical unit. The storage proxy method includes the following steps. One of the logical units of the storage systems as a proxy logical unit is selected. The mirrored logical unit is simulated as a virtual logical unit in the SAN device, wherein the virtual logical unit has a virtual identity the same as the identity of the selected proxy logical unit. A transparent communication for management functions between the server and the proxy logical unit is provided via the virtual logical unit or a special proxy logical unit.

Abstract: A distributed storage management platform (DSMP) architecture is disclosed. Such a DSMP architecture includes a number of storage routers. Each one of the storage routers comprises a number of interface controllers. One of the interface controllers of each one of the storage routers is communicatively coupled to one of the interface controllers of at least one other of the storage routers.

Abstract: A distributed storage management platform (DSMP) architecture is disclosed. Such a DSMP architecture includes a number of storage routers. Each one of the storage routers comprises a number of interface controllers. One of the interface controllers of each one of the storage routers is communicatively coupled to one of the interface controllers of at least one other of the storage routers.

Abstract: A method and apparatus implement a communications protocol whereby a host application program can communicate with a computer subsystem without the use of special driver software. In this way, the application program is able to invoke virtually any vendor-unique function on a compatible subsystem controller using only standard read/write system calls. This avoids platform dependency and greatly improves the portability of the application program.

Abstract: A distributed storage management platform (DSMP) architecture is disclosed. Such a DSMP architecture includes a number of storage routers. Each one of the storage routers comprises a number of interface controllers. One of the interface controllers of each one of the storage routers is communicatively coupled to one of the interface controllers of at least one other of the storage routers.