摘要:
A computer system for performing a remote copy using a journal so as to maintain conformability of data stored in a secondary storage system even though a time stamp is not granted to write data received by a primary storage system. A storage managing unit issues an ID, such as a time stamp number (TS#) next to an immediately previously issued ID to one or more primary storage systems (PDKCs) at regular or irregular intervals. Upon receiving a write command, each PDKC prepares a journal (JNL) including a replica of write data and the newest ID from the storage managing unit, and transmits the journal to a secondary storage system (SDKC). The SDKC stores a received JNL and reflects up to a particular JNL of non-reflected JNLs in a secondary volume. The particular JNL has an ID older by one than the oldest ID of the newest arrival completion IDs in one or more SDKCs.
摘要:
A bookbinding apparatus for trimming sheets includes an adhesive applying device for applying adhesive to a back of the sheets; a trimming blade disposed in a trimming position; a bunch position changing device disposed in a transport path to change a position of the sheets in the trimming position; a blade receiving member having at least first and second blade receiving areas with different blade receiving surfaces contacting with the trimming blade; a driving device positioning the trimming blade between a cut position for bringing the trimming blade into contact with the blade receiving member and a spaced waiting position; a shift device selectively shifting one of the first and second blade receiving areas to a predetermined trimming position, and a control device for controlling the shift means and the driving means.
摘要:
In a data processing system in which main and sub disk storage devices are under the control of individual each disk control devices, the write processing time is reduced by selectively sending data according to the command-chaining time between main and sub disk control devices. A section for judging cable length and function of the sub disk control device 36 estimates command-chaining time between a pair of main and sub disk storage devices. The channel command analyzing section 31 estimates the number of records to be transferred and the length of a record using a LOCATE RECORD command. The command judgment section for the sub disk control device 32 optimizes the command-chain to be issued to the sub disk control device using the above-mentioned information. Then, the section for issuing command to the sub disk control device 35 issues the optimized command chain. Thus, a shorter transmission time is realized by either sending individual records or an entire track of data.
摘要:
A storage apparatus enables efficient data restoration even if restoration is attempted using several different restoration points. The storage system is connected to a host apparatus, and includes a storage unit having various logical volumes formed therein and a controller configured to control I/O processing with respect to the storage unit. The controller stores journal data for a data volume in a journal volume, and also stores snapshot data for the data volume in a snapshot volume. In accordance with a restoration request designating a restore point, the controller restores the data volume to the state it was in as of the designated restore point, by applying the snapshot data stored in the snapshot volume and subsequently applying the journal data stored in the journal volume. During that process, the controller saves the data in the data volume to which certain journal data is going to be applied, in a journal backup volume.
摘要:
An image reading apparatus includes a transfer device for transferring a sheet, and a reading device for reading an image of the sheet at a prescribed read position. A light volume detection device is arranged at a position of one side end in a direction perpendicular to a transfer direction of the sheet to be transferred to detect the light volume according to a deviation amount at a sheet transfer position in a direction perpendicular to the transfer direction of the sheet end. An operation device calculates the deviation amount with respect to a reference position of the sheet transfer position from a difference between the light volume detected by the light volume detection device when the sheet is not present at the sheet transfer position and the light volume detected by the light volume detection device when the sheet is transferred to the sheet transfer position.
摘要:
Imaging-system bookbinding apparatus avoids cutting any folded sheets mixed into booklets it trims. Furnished with: an imaging unit; a sheet-folding unit that folds imaging-unit sheets; a stacking unit that stacks sheets from the sheet-folding or image-forming units; a cover-sheet binding unit that encases stacking-unit sheet bundles with, and binds them into, cover sheets; a trimming unit that trims true the bundle fore-edge; and a fold-position computing unit that determines where a sheet is pleated by the sheet-folding unit. The sheet-folding unit has a sheet conveyance path along which folded sheets are transported elsewhere than the stacking unit, while the fold-position computing unit in a first control mode transports to the stacking unit sheets folded over by the sheet-folding unit, and in a second control mode transports them from the sheet conveyance path elsewhere than the stacking unit.
摘要:
A sheet supplying device includes a stacker for placing sheets; a delivery device for separating and feeding the sheets on the stacker; a register device for temporarily holding a sheet; a sheet conveying guide for guiding the sheet from the register device to a processing position; a sheet sensor disposed between the delivery device and the register device for detecting the sheet; at least one driving device for driving the delivery device and the register device; a conveyance control device for controlling the driving device so that the delivery device and the register device form a loop of the sheet according to a signal from the sheet sensor and an overlap sensor disposed between the register device and the processing position for detecting overlapping of the sheet. An overlap determining device determines overlapping of the sheet according to signals from the sheet sensor and the overlap sensor.
摘要:
A sheet feeding device includes a stacker on which sheets are placed, a sheet feeding device for separating and feeding a sheet from other sheets on the stacker, a sheet overlap sensing device placed in a sheet conveying path at a downstream side of the sheet feeding device, and a sheet sensing device for detecting whether the sheet is located in the sheet overlap sensing device. An error determining device determines whether the sheet overlap sensing device is operating normally.
摘要:
The storage system of the present invention has a simple configuration and ensures redundancy of the system. The primary storage control device and the first secondary storage control device are connected by a synchronous read method, and the primary storage control device and the second secondary storage control device are connected by an asynchronous read method. The primary storage control device sets a management number in the update data and saves a journal data. The primary storage control device associates the management number with the update data and transmits them to the first secondary storage control device. The first secondary storage control device writes the update data to the first secondary volume, associates the management number with the storage destination address of the update data and stores them in the maintenance table. If the primary storage control device stops, the first secondary storage control device becomes anew a primary storage control device. The first secondary storage control device is connected to the second secondary storage control device by an asynchronous read method.
摘要:
A sheet feeding apparatus includes a sheet size recognition device for recognizing length of a sheet placed on a stacker in a transport direction, an ultrasonic double feed detection device arranged between a first transport device and a second transport device for detecting a double feed of sheets, and a transport length detection device for detecting a transport length of the sheet transported by the first and second transport devices from a leading edge of the sheet to a trailing edge of the sheet. A comparison device compares the length of the sheet recognized by the sheet size recognition device and the transport length of the sheet detected by the transport length detection device. A judgment device judges the double feed of the sheets based on at least one of a comparison result from the comparison device and a detection result from the double feed detection device.