Patent application number | Description | Published |
20080263244 | COMPRESSION CONTROL DEVICE AND METHOD - The present invention provides a compression control device for controlling the compression of data transceived in a storage system constituted by a plurality of apparatuses which include a storage device. The compression control device decides a compression control method for at least one apparatus constituting the storage system based on configuration information related to the configuration of the storage system, and controls at least one of the plurality of apparatuses such that the at least one apparatus carries out compression in accordance with the decided compression control method. | 10-23-2008 |
20080285590 | STORAGE SYSTEM, COMPUTER SYSTEM AND INTERFACE MODULE - An interface module comprises a serial signal transceiver to be connected to an external transmission path and an interface processing unit connected to the transceiver. The interface processing unit comprises a serializer/deserializer circuit, an encoder/decoder, a protocol processing unit having at least two kinds of selectable protocol processing functions, and a communicate mode switch circuit for changing reference clock to be supplied to the serializer/deserializer circuit in conjunction with switching of the protocol processing function from one to another. | 11-20-2008 |
20090006863 | Storage system comprising encryption function and data guarantee method - This storage system includes a host computer for issuing a read command or a write command of data, a pair of logical volumes corresponding to a pair of virtual devices to be recognized by the host computer, and a device interposed between the host computer and the pair of logical volumes and having a function of encrypting and decrypting data. The storage system additionally includes a path management unit for specifying one path to each of the logical volumes from a plurality of data transfer paths between the host computer and the pair of logical volumes for transferring encrypted data or decrypted data which was encrypted or decrypted via the device with data encryption or decryption function based on a read command or a write command of data from the host computer. | 01-01-2009 |
20090010432 | STORAGE SYSTEM EXECUTING ENCRYPTION AND DECRYPTION PROCESSING - A storage system | 01-08-2009 |
20090089483 | Storage device and deduplication method - This storage device performs deduplication of eliminating duplicated data by storing a logical address of one or more corresponding logical unit memory areas in a prescribed management information storage area of a physical unit memory area defined in the storage area provided by the flash memory chip, and executes a reclamation process of managing a use degree as the total number of the logical addresses used stored in the management information storage area and a duplication degree as the number of valid logical addresses corresponding to the physical unit memory area for each of the physical unit memory areas, and returning the physical unit memory area to an unused status when the difference of the use degree and the duplication degree exceeds a default value in the physical unit memory area. | 04-02-2009 |
20090222623 | STORAGE SYSTEM AND MANAGEMENT METHOD OF ITS STORAGE MEDIUM - High availability is provided in a storage system that offers expandability more inexpensively. Provided is a storage system including multiple expanders to be connected to multiple storage mediums, multiple cascades connected respectively to a prescribed number of expanders among the multiple expanders, and multiple control units for respectively controlling the multiple cascades. One end of the multiple cascades is connected with an inter-cascade link, and the inter-cascade link has a logically connected state and a logically disconnected state. | 09-03-2009 |
20090259791 | ADJUSTMENT NUMBER OF EXPANDERS IN STORAGE SYSTEM - A storage system for storing data includes: a plurality of storage devices; a controller device; a plurality of expanders; and a path adjusting unit. The path adjusting unit includes: a target specifying unit, a destination selecting unit; and a data migrating unit. The target specifying unit specifies target data to be targeted for adjustment in the plurality of storage devices. The destination selecting unit selects a storage device in which to store the specified target data to reduce the number of expanders on a data transfer pathway for the specified target data. The data migrating unit migrates the specified target data to the selected storage device. | 10-15-2009 |
20090287953 | STORAGE SYSTEM - A storage system encrypts plain text from an external device and stores the cryptogram into a disk unit, decrypts stored data in the disk unit and transmits decrypted text to the external device. The plain and decrypted text must be in agreement when seen from the external device. If a failure occurs in the encrypting or decrypting process, the plain and decrypted text disagree. The storage system includes an encryption unit for encrypting first data, a decryption unit for decrypting the encrypted data into second data, and a comparison unit for comparing the first and second data. When the first and second data do not agree, the first data is encrypted by a different encryption unit and the encrypted data is decrypted into third data, whereupon the first and third data are compared. When the first and third data do not agree, a failure report is sent. | 11-19-2009 |
20100042832 | STORAGE SYSTEM FOR DATA ENCRYPTION - A storage system including a host interface connected via a network to a host computer; a disk interface connected to a disk drive; a memory module that stores control information of a cache memory for an access to the disk drive and the storage system; a processor that controls the storage system; a network that interconnects the host interface, the disk interface, the memory module, and the processor; and an encryption module that encrypts data read/written by the host computer, in which the processor reads data from an area of the disk drive from the memory module, decrypts the read data with a corresponding encryption key, encrypts the decrypted data with a different encryption key, and writes the encrypted data in a different area. | 02-18-2010 |
20100091621 | Storage System and Communications Method - In a storage system including a host computer, and a disk control device connected to the host computer for communications therewith, and performs control over a disk device that stores therein data requested for writing from the host computer, for data transmission from a host interface section or a disk interface section to a memory section, when the data asked by a transmission source for storage is stored in a transmission destination, the transmission destination is put in a first mode for communications of forwarding a response back to the transmission source. With such a configuration, favorably provided is the storage system that offers a guarantee of reliability with the improved processing capabilities thereof. | 04-15-2010 |
20110035541 | STORAGE DEVICE AND DEDUPLICATION METHOD - This storage device performs deduplication of eliminating duplicated data by storing a logical address of one or more corresponding logical unit memory areas in a prescribed management information storage area of a physical unit memory area defined in the storage area provided by the flash memory chip, and executes a reclamation process of managing a use degree as the total number of the logical addresses used stored in the management information storage area and a duplication degree as the number of valid logical addresses corresponding to the physical unit memory area for each of the physical unit memory areas, and returning the physical unit memory area to an unused status when the difference of the use degree and the duplication degree exceeds a default value in the physical unit memory area. | 02-10-2011 |
20110200191 | STORAGE SYSTEM EXECUTING ENCRYPTION AND DECRYPTION PROCESSING - A storage system includes a channel interface (IF) unit having an interface with a server, a disk IF unit having an interface with a hard disk group, a memory unit for storing data to be read/written from/to the server or the hard disk group, a switching unit, and the hard disk group. The channel IF unit, the disk IF unit, and the memory unit are connected to each other through the switching unit, and an encryption and decryption processing unit is provided between a host IF unit and a transfer controller in the channel IF unit. | 08-18-2011 |
20120198139 | STORAGE DEVICE AND DEDUPLICATION METHOD - This storage device performs deduplication of eliminating duplicated data by storing a logical address of one or more corresponding logical unit memory areas in a prescribed management information storage area of a physical unit memory area defined in the storage area provided by the flash memory chip, and executes a reclamation process of managing a use degree as the total number of the logical addresses used stored in the management information storage area and a duplication degree as the number of valid logical addresses corresponding to the physical unit memory area for each of the physical unit memory areas, and returning the physical unit memory area to an unused status when the difference of the use degree and the duplication degree exceeds a default value in the physical unit memory area. | 08-02-2012 |
20130019123 | STORAGE SYSTEM AND COMMUNICATIONS METHOD - Storage system arrangement wherein: when a transmission destination determines that a source-side serial number included in a received packet is the same as a current destination-side serial number in the transmission destination, the transmission destination processes a content of the received packet in accordance with a command included in the received packet; and when the transmission destination determines that the source-side serial number is not the same as the current destination-side serial number, the transmission destination does not process a content of the received packet. | 01-17-2013 |
20130275630 | DATA TRANSFER METHOD AND STORAGE SYSTEM ADOPTING DATA TRANSFER METHOD - According to a prior art data transfer method of a storage subsystem, when competition of data transfer accesses occurs, a free access destination port is allocated uniformly without determining the access type or the access state of the access destination, so that the performance of the device is not enhanced. The present invention solves the problem by selecting a data transfer access for completing data transfer with priority based on the access type or the remaining transfer data quantity of competing data transfer accesses, or by changing the access destination of an access standby data transfer access, thereby performing data transfer efficiently. | 10-17-2013 |