Abstract:
In a semiconductor device 100, a light emitting element 120 has been mounted on an upper plane of a semiconductor substrate 102. In an impurity diffusion region of the semiconductor substrate 102, a P conducting type of a layer 104, and an N layer 106 have been formed, while an N conducting type impurity is implanted to the P layer 104, and then the implanted impurity is diffused to constitute the N layer 106. A zener diode 108 made of a semiconductor device has been formed by the P layer 104 and the N layer 106.
Abstract:
A heterogeneous network includes network related hardware and software products from a plurality of vendors. The network includes a storage system configured to store data, a server configured to process requests, a switch coupling the storage system and the server for data communication, and a network manager including an event dictionary to interpret an event message received from a device experiencing failure.
Abstract:
A management computer includes a management unit for managing the load of the virtual storage extent and the threshold value thereof in the virtual storage subsystems for each prescribed period; and a migration command unit for commanding, when the load of the virtual storage extent managed by the management unit exceeds the threshold value and with the virtual storage extent as the virtual storage extent to be migrated, the migration of the virtual storage extent to be migrated to another virtual storage subsystem that is mutually communicable with a host computer provided with the virtual storage extent to be migrated and a storage subsystem having the storage extent associated with the virtual storage extent to be migrated; and wherein the virtual storage subsystem includes a migration unit for migrating the virtual storage extent to be migrated commanded by the migration command unit to the other virtual storage subsystem.
Abstract:
In a storage system having a function of acquiring update history information in correspondence with a write operation from a host, update data according to the amount of data written will become enormous. Thus, there is a problem in that long-term backup and data management using update history information is not possible. A management computer defines a service level according to time progress of data, and stores and manages update history information according to the service level in the respective stages. The management computer manages the update history Information, and partially migrates update data from a certain storage system to another storage system according to the service level required in the data. The management computer also restores data in the storage system to which the update data was migrated.
Abstract:
It has been impossible in prior art to copy every piece of data that is stored in a virtual volume. A management computer of this invention receives a copy request that designates a real storage area as a copy source, selects a virtual storage area that is associated with plural real storage areas as a copy destination virtual storage area, and judges whether or not a copy source virtual storage area and the copy destination virtual storage area are allocated to real storage areas. Based on a result of the judging, the management computer gives an instruction to copy data that is stored in the copy source real storage area to a copy destination real storage area, and keeps information about a replication relation between the copy source real storage area and the copy destination real storage area on which the data copy has been performed.
Abstract:
A storage service manager facilitates an operator's task for managing large-scale storage facilities. Allocating access paths on the storage network is accomplished by the use agent programs which interface to various components comprising a data path from the client to the storage system. The agent programs hide various vendor-specific and technology-dependent aspects of the storage network components from the user.
Abstract:
A first storage system includes a first storage area for storing data written by a computer. A second storage system includes a second storage area to which the data stored in the first storage area migrates. A third storage system includes a virtual storage area corresponding to the second storage area. An access request to the virtual storage area is converted into an access request to the second storage area to be issued. A management computer transmits, to the third storage system, an instruction to migrate the data of the second storage area to a third storage area of the third storage system based on a determination result between a value of the data migrated to the second storage area and a predetermined threshold value.
Abstract:
A managed network storage apparatus comprising a plurality of storage service management devices, a storage device, a multi protocol label switching network and a plurality of client groups performs a label distribution method that insures that clients and service providers are provided with network Quality of Service, storage performance, and network security. A network management device calculates alternative best routes for the data in order to satisfy the Quality of Service parameters and the storage performance requirements.
Abstract:
In remote data replication between storage systems, there are cases where the storage extent capacity used as the temporary storage extent in the storage system will incur waste. In a system having a management computer, a host computer, a first storage system, and a second storage system, when maintaining the replicated data of the first storage system in the second storage system via remote data replication, a change or the like in the traffic from the host computer to the first storage system is monitored, and the management computer instructs the storage system to switch the remote data replication mode in accordance with such traffic.
Abstract:
When a computer system including a data storage apparatus having a data storage area storing encrypted data is modified to have plural encryption/decryption units, a computer cannot appropriately use the encrypted data storage area if a path including the encryption/decryption means is not adequately determined. In a computer system having a computer 10, two or more data storage apparatuses 100 and 200 arranged hierarchically, plural encryption/decryption modules 199 and 299 on a path between the computer 10 and a data storage area 101, and a management computer 500 for managing the data storage apparatuses and the like, if there is an interoperability between the encryption/decryption modules 199 and 299 and the data storage area 101 is encrypted by the first encryption/decryption module 199, the computer 10 accesses the data storage area 101 using the second encryption/decryption module 299 (or an n-th encryption/decryption module closer to the computer than the second encryption/decryption module), rather than the first encryption/decryption module.