摘要:
A multiple disk system comprises plural physical drives organized as plural groups of disks. Each group is accessed as a plurality of logical volumes. One of the logical drives is considered a primary volume and one or more other logical volumes are considered as secondary volumes, which together constitute a mirroring group. Data contained in a memory records such organization. The data is consulted to select a secondary volume when the disk group containing a primary volume fails.
摘要:
In a storage system having local and remote disk systems, a system is described for selectively controlling the security of data on a volume by volume basis, for transparently exchanging encryption keys between the local and remote disk systems, and for controlling when encryption is used in the storage of data.
摘要:
The storage system comprises a plurality of flash packages configuring one or more RAID groups, and a controller coupled to the plurality of flash packages. Each flash package comprises a plurality of flash chips configured from a plurality of physical blocks. The controller identifies a target area related to an unnecessary area, unmaps a physical block allocated to a logical block belonging to this target area from this logical block, and manages the unmapped physical block as a free block.
摘要:
With a computer system having a host computer and first and second storage apparatuses, the second storage apparatus virtualizes first logical units in the first storage apparatus and provides them as second logical units to the host computer, collects configuration information about each first logical unit, and sets each piece of the collected configuration information to each corresponding second logical unit. The host computer adds a path to the second logical units and deletes a path to the first logical units. The second storage apparatus copies data stored in the first logical units to a storage area provided by the second storage device and associates the storage area with the second logical units.
摘要:
A controller in a flash memory device manages erase count of each physical block and manages the erase frequency of each logical block. The controller allocates a logical block whose erase frequency is high to one or more physical blocks whose erase count is low.
摘要:
A multiple disk system comprises plural physical drives organized as plural groups of disks. Each group is accessed as a plurality of logical volumes. One of the logical drives is considered a primary volume and one or more other logical volumes are considered as secondary volumes, which together constitute a mirroring group. Data contained in a memory records such organization. The data is consulted to select a secondary volume when the disk group containing a primary volume fails.
摘要:
A multiple disk system comprises plural physical drives organized as plural groups of disks. Each group is accessed as a plurality of logical volumes. One of the logical drives is considered a primary volume and one or more other logical volumes are considered as secondary volumes, which together constitute a mirroring group. Data contained in a memory records such organization. The data is consulted to select a secondary volume when the disk group containing a primary volume fails.
摘要:
An exhaust silencer device which is interposed in an exhaust passage in a vehicle to reduce exhaust noise comprises a sub-muffler which is interposed in the exhaust passage and has an expansion chamber formed therein; an inlet pipe which is airtightly inserted through an inlet opening of the sub-muffler; and an outlet pipe which is airtightly inserted through an outlet opening of the sub-muffler, wherein the inlet pipe and the outlet pipe are formed with openings (small apertures, non-joined portions) only in their upper half area and their lower half area is sealed without having the openings.
摘要:
A cache package (for example, a flash memory package configured by flash memories) can execute a cache control process instead of a processor in a storage system by a request of the cache control process from the storage system. Consequently, time for the process that the processor of the storage system executes can be reduced and increase in a throughput can be achieved. For example, particularly the present invention is effective in real time data processing in OLTP (OnLine Transaction Processing) (for example, database processes in finance, medical service, Internet service, and government and public service). In addition, under the concept of recent EPR (Enterprise Resource Planning) a flexible storage system that can respond rapid fluctuation in an amount of data and an access load can be established and leveraged by increasing several boards of required cache packages.
摘要:
A method for manufacturing a flow passage assembly includes forming a first flow passage in a first joint interface formed by welding a first surface of a first flow passage forming member to a first surface of a second flow passage forming member using an ultrasonic welding process, and forming, after the first flow passage is formed, a second flow passage in a second joint interface formed by welding a first surface of a third flow passage forming member to one of a second surface of the first flow passage forming member and a second surface of the second flow passage forming member using an ultrasonic welding process. A total area of weld portions used when the first flow passage is formed is greater than a total area of weld portions used when the second flow passage is formed.