Abstract:
To inhibit the occurrence of communication failures in the system in which a secondary storage control apparatus acquires journal data from a primary storage control apparatus and writes the data to a secondary volume.The primary storage control apparatus comprises a command processing unit, a journal data creation unit, a journal data transfer unit which reads journal data from a primary journal volume based on a journal data read request and transfers the read journal data to the secondary storage control apparatus, and a transfer control unit. In specified occasions, the transfer control unit controls at least either one of the journal data transfer amount by the journal data transfer unit and the width of the communication band utilized for journal data transfer.
Abstract:
A method and apparatus for facilitating control interface failover in a media storage device is described. In one embodiment, the method couples a media changer device to a plurality of removable media storage drives, where each removable media storage drive comprises a first port having a first port name and assigns a second port name to either the first port or to a second port of a first removable media storage drive in the plurality of removable media storage drives, where the second port name comprises at least a portion of portable identity data. The method preserves the portable identity data to be utilized during a control interface failover process to transfer the second port name from the first removable media storage drive to a second removable media storage drive in the plurality of removable media storage drives.
Abstract:
A storage virtualization computer system. The storage virtualization computer system comprises a host entity for issuing an IO request, a SAS storage virtualization controller coupled to the host entity for executing IO operations in response to the IO request, and at least one physical storage device, each coupled to the storage virtualization controller through a SAS interconnect, for providing data storage space to the storage virtualization computer system through the SAS storage virtualization controller.
Abstract:
If a failure occurs in physical resources constituting a virtual volume, a management server device is notified of information required by a user.A computer system includes a server device for managing a plurality of virtual volumes, a storage apparatus having a storage unit equipped with a plurality of storage devices, and a controller for controlling data input to, or output from, the storage unit, a management server device which is an access target of a user terminal, and an event management device for managing an event(s) generated by the server device or the storage apparatus, wherein when the event management device receives the event, it judges the content of the event and identifies a virtual volume to be affected by the event; and if a service level that should be satisfied by the identified virtual volume is defined for the identified virtual volume, the event management device identifies, based on the content of the received event, whether an incident in violation of the service level has occurred or not, and then notifies the management server device of the identified content as an event based on an event filter.
Abstract:
Performance degradation caused by a failure occurring in a disk array device is suppressed. The disk array device comprises the dual structure controllers which are respectively connected to the host computer through the connection path, and a plurality of physical disks, wherein the controller comprises the failure sensing unit which senses a failure of the device, and the host interface control unit which, in a case where a failure is sensed by the failure sensing unit, when an inquire about a connection path to be preferentially used is made from the host computer, notifies the connection path connected to the other controller as a preferential path.
Abstract:
A data storage network is provided. The network includes a client connected to the data storage network; a plurality nodes on the data storage network, wherein each data node has two or more RAID controllers, wherein a first RAID controller of a first node is configured to receive a data storage request from the client and to generate RAID parity data on a data set received from the client, and to store all of the generated RAID parity data on a single node of the plurality of nodes.
Abstract:
It is an object to improve a reliability of a data protection for a storage control apparatus that is provided with a redundant configuration that is made of a plurality of clusters. A memory unit in each of the clusters C1 and C2 is provided with a first memory 3 having a volatile property, a battery 5 that is configured to supply an electrical power to the first memory 3, and a second memory 4 that stores data that is transferred from the first memory 3 in the case of a power outage. A control unit selects an operating mode for protecting data from a normal mode, a write through mode, and an access disable mode (a not ready state) based on a remaining power level of the battery 5.
Abstract:
A storage system and a path management method, which can facilitate node replacement, are proposed. In the storage system, the host sets plural paths between the host and the volume and holds path information composed of management information on each of the paths. The management apparatus includes an integrated path management unit that collects the path information on each of the paths defined between the host and the volume from the corresponding host to manage all the collected information as integrated path information; retrieves an alternate path going through a node other than a specified node but that has the same function as the specified node, for the path going through the specified node, based on the integrated path information; and displays results of the retrieval.
Abstract:
A communications architecture utilizes modules arranged in a daisy-chain, each module supporting multiple input and output ports. Point-to-point links are arranged so that a first output link of each of multiple modules connects to the next module in the chain, and a second output link connects to a module after it, and inputs arranged similarly, so that any single module can be by-passed in the event of malfunction. Multiple chains may be cross-linked and/or serviced by hubs or chains of hubs. Preferably, the redundant links are used in a non-degraded operating mode to provide higher bandwidth and/or reduced latency of communication. The exemplary embodiment is a memory subsystem in which the modules are buffered memory chips.
Abstract:
A storage system and a path management method, which can facilitate node replacement, are proposed. In the storage system, the host sets plural paths between the host and the volume and holds path information composed of management information on each of the paths. The management apparatus includes an integrated path management unit that collects the path information on each of the paths defined between the host and the volume from the corresponding host to manage all the collected information as integrated path information; retrieves an alternate path going through a node other than a specified node but that has the same function as the specified node, for the path going through the specified node, based on the integrated path information; and displays results of the retrieval.