摘要:
The storage system of the present invention is able to generate one virtual logical device from different logical devices which exist in each of the different storage control units and remote-copy all or part of the virtual logical device to another logical device. The same virtual identifier is set for a volume of the first storage unit and for a volume of the second storage unit. The path control unit of the host identifies a plurality of volumes which have the same virtual identifier as one virtual volume. A remote copy pair can also be set by a virtual volume and a volume of the third storage unit. The setting of the virtual volume and the setting of the remote copy can be performed by means of an instruction from the management server.
摘要:
A storage apparatus has a channel board 11; a drive board 13; a cache memory 14; a plurality of processor boards 12 that transfer data; and a shared memory 15. The channel board 11 stores a frame transfer table 521 containing information indicative of correspondence between LDEV 172 and each of the processor boards 12, set in accordance with a right of ownership that is a right of access to the LDEV 172. The processor boards 12 store LDEV control information 524 in a local memory 123, which is referred to by the processor board at the time of access The channel board 11 transfers a data frame that forms the received data I/O request, to one of the processor boards 12 corresponding to the LDEV 172 specified from the information contained in the frame by using the frame transfer table 521.
摘要:
An object is to efficiently and securely process a data I/O request received from an external apparatus by a storage apparatus. A storage apparatus 10 includes a channel board 11, a drive board 13, a cache memory 14, a plurality of processor boards 12 that perform data transfer, and a shared memory 15, and the channel board 11 stores a third destination search 1211 that associates a sequence identifier with a processor identifier, the sequence identifier being information that identifies a sequence which includes a series of data frames delivered to and received from a host apparatus 2 and to which a data frame belongs, the processor identifier being information that identifies a processor 1221 included in the processor board 12. The channel board 11 determines a processor to be a destination for the received data frame by acquiring the processor identifier associated with the sequence identifier acquired from the received data frame, from the third destination search 1211, and transfers the received data frame to the processor 1221 thus determined.
摘要:
A virtualization system, including: at least one first port coupled to at least one host system; at least one second port coupled to a plurality of storage systems; wherein the virtualization system is capable to control to perform processes of splitting a relationship between the first virtual volume and the second virtual volume; storing first differential information identifying data of a first write request; write data of first write request to a storage area of the disk drives related to the first logical volume; storing second differential information identifying data of a second write request, the data of the second request being written after the splitting step, receiving a differential copying request; to copy differential data from the first virtual volume to the second virtual volume, or to copy differential data from the second virtual volume to the first virtual volume.
摘要:
A plurality of virtual volumes with different control functions are associated with one real volume and remote copying is conducted. A relay system comprises a plurality of virtual volumes V12, V21 mapped to the same real volume R1. A virtual volume V21 for transmission control is mapped to a real volume R1, a real volume R2 is mapped to the virtual volume V21, and the virtual volume V12 for reception control is mapped to the real volume R2. If a command is received from a local system 10, the virtual volume V12 for reception control writes data into the virtual volume V21 via the real volume R2 (virtual entity). The virtual volume V21 transmits the data to a copy destination volume V22 and writes the data into the real volume R1.
摘要:
Provided is a storage controller having at least one or more first logical devices to be accessed by the host system, and at least one or more virtual devices for connecting the first logical devices and one or more storage devices. At least one of the virtual devices is connected to a second logical device of the other storage controller. With this storage controller, the access attribute of the first logical device and the access attribute of the second logical device are made to coincide by transmitting and receiving access attribute information of at least either the first logical device or the second logical device to and from the second storage controller.
摘要:
A plurality of virtual volumes with different control functions are associated with one real volume and remote copying is conducted. A relay system comprises a plurality of virtual volumes V12, V21 mapped to the same real volume R1. A virtual volume V21 for transmission control is mapped to a real volume R1, a real volume R2 is mapped to the virtual volume V21, and the virtual volume V12 for reception control is mapped to the real volume R2. If a command is received from a local system 10, the virtual volume V12 for reception control writes data into the virtual volume V21 via the real volume R2 (virtual entity). The virtual volume V21 transmits the data to a copy destination volume V22 and writes the data into the real volume R1.
摘要:
Proposed is a storage system capable of preventing the compression of a cache memory caused by data remaining in a cache memory of a storage subsystem without being transferred to a storage area of an external storage, and maintaining favorable I/O processing performance of the storage subsystem. In this storage system where an external storage is connected to the storage subsystem and the storage subsystem provides a storage area of the external storage as its own storage area, provided is a volume for saving dirty data remaining in a cache memory of the storage subsystem without being transferred to the external volume. The storage system recognizes the compression of the cache memory, and eliminates the overload of the cache memory by saving dirty data in a save volume.
摘要:
A storage control system is provided where a first host system connected to a first storage controller can issue a control command to a second storage controller connected another host system. The first storage controller is connected to the second storage controller and the command is issued without providing the command to the other host system. The first storage controller has a virtual volume, a memory unit for storing information necessary for mapping the virtual volume to a logical device in the second storage controller, and attribute information for the logical device. The host system identifies the virtual volume as the logical device in the second storage controller and issues a control command to this logical device via the virtual volume.
摘要:
The storage system of the present invention is able to generate one virtual logical device from different logical devices which exist in each of the different storage control units and remote-copy all or part of the virtual logical device to another logical device. The same virtual identifier is set for a volume of the first storage unit and for a volume of the second storage unit. The path control unit of the host identifies a plurality of volumes which have the same virtual identifier as one virtual volume. A remote copy pair can also be set by a virtual volume and a volume of the third storage unit. The setting of the virtual volume and the setting of the remote copy can be performed by means of an instruction from the management server.