Abstract: A storage system includes a storage apparatus, a control apparatus, and a host apparatus. The storage apparatus includes a recording medium. The control apparatus includes a detection unit and a control unit. The detection unit detects whether a recording medium loaded in the storage apparatus is a stand-alone-only recording medium that is used in a stand-alone mode. When the recording medium is the stand-alone-only recording medium, the control unit registers a physical volume of the stand-alone-only recording medium as a logical volume and automatically switches the operation mode of the control apparatus to the stand-alone mode.

Abstract: A data transfer control device includes a processor. The processor is configured to measure a data transfer performance for each number of destination recording media. The data transfer performance is a performance for copying test data from a first storage device to a second storage device connected to the first storage device through a line. The destination recording media are included in the second storage device and serve as copy destinations of the copying. The processor is configured to determine a first number of destination recording media on basis of the data transfer performance measured for each number of destination recording media. The processor is configured to control a remote copy of copying data from the first storage device to the second storage device. The remote copy is performed by using the first number of destination recording media.

Abstract: A storage system includes a storage apparatus, a control apparatus, and a host apparatus. The storage apparatus includes a recording medium. The control apparatus includes a detection unit and a control unit. The detection unit detects whether a recording medium loaded in the storage apparatus is a stand-alone-only recording medium that is used in a stand-alone mode. When the recording medium is the stand-alone-only recording medium, the control unit registers a physical volume of the stand-alone-only recording medium as a logical volume and automatically switches the operation mode of the control apparatus to the stand-alone mode.

Abstract: A data management device includes a processor. The processor is configured to transmit data of a logical volume to a library device different from the data management device so as to record the data of the logical volume on a portable recording medium managed by the library device. The processor is configured to prepare recognition information whenever data of a logical volume is recorded on the portable recording medium. The recognition information is used to recognize entire first logical volumes. Data of the first logical volumes is recorded on the portable recording medium. The processor is configured to transmit the recognition information to the library device so as to record the recognition information on the portable recording medium.

Abstract: In a storage system, a processor accepts designation of export data that is to be written to a first portable record medium. The designated export data is divided into first export data and second export data. The first export data is already in the storage apparatus, while the second export data is still in second portable record mediums. The second export data is read out of the second portable record mediums and entered to the storage apparatus. The processor detects the current amount of the first export data in the storage apparatus, as well as the current amount of the second export data still unread from the second portable record mediums. The processor determines when to start writing the export data to the first portable record medium, based on the current amount of the first export data and the current amount of the second export data.

Abstract: A storage system includes a library apparatus, a storage apparatus, and a control apparatus including a processor. The processor is configured to execute a copy processing of copying data of a plurality of logical volumes from a storage apparatus to a first recording medium. The copy processing includes a read processing of reading first data of a first logical volume from the storage apparatus, and a first write processing of writing the first data to the first recording medium. The processor is configured to execute a second write processing of writing second data of the first logical volume to the storage apparatus. The processor is configured to interrupt the first write processing and execute the second write processing in a case where a conflict occurs between the second write processing and the first write processing, and resume the copy processing from a leading part of the first logical volume.

Abstract: A storage system includes plural drive devices and a control device. Each of the plural drive devices reads or writes data from or to a portable recording medium. The control device performs a parallel process in which a first process and a second process are performed in parallel. The first process is to write specified data to a first portable recording medium via a first drive device of the plural drive devices. The second process is to write the specified data to a second portable recording medium via a second drive device of the plural drive devices. The control device cancels, upon completion of either one of the first process and the second process, the other one of the first process and the second process.

Abstract: A control apparatus connectable to a memory unit for storing data, for controlling a first tape writing unit including a plurality of first tapes and a second tape writing unit including a plurality of second tapes so that the first and second writing units write same data stored in the memory unit to one of the first tapes and one of the second tapes, respectively, has an obtaining unit for obtaining a progress value indicating a progress of writing data into the one of the second tapes upon completely writing the data into one of the first tapes and a controller for controlling the first and the second tape writing units so that the first and the second writing unit change the writing tapes to another of the first tapes and another of second tapes when the progress value being not more than a predetermined value.

Abstract: A storage system includes plural drive devices and a control device. Each of the plural drive devices reads or writes data from or to a portable recording medium. The control device performs a parallel process in which a first process and a second process are performed in parallel. The first process is to write specified data to a first portable recording medium via a first drive device of the plural drive devices. The second process is to write the specified data to a second portable recording medium via a second drive device of the plural drive devices. The control device cancels, upon completion of either one of the first process and the second process, the other one of the first process and the second process.

Abstract: A tape library control apparatus includes a storage for storing configuration information, a diagnostic evaluator, and a command controller. A tape library apparatus includes may include a plurality of tape drives and a plurality of magnetic tapes which includes specific magnetic tapes assigned for respective pieces of data specified by each data request issued by a host computer and a common magnetic tape provided for writing the respective pieces of the data. The diagnostic evaluator determines a use mode of the tape library apparatus on the basis of the configuration information. When the total number of the specific magnetic tapes is higher than the number of available tape drives, the use mode is determined and a command is issued to the tape library apparatus from the command controller to write data to the specific magnetic tape and to write to the common magnetic tape the respective pieces of the data.

Abstract: In a storage system a write processing section writes data, of ejection object data, which is stored in a storage apparatus to an ejection portable record medium. A read processing section reads out data, of the ejection object data, which is not stored in the storage apparatus at the time of an ejection request being made from portable record mediums contained in a store section, and stores the data in the storage apparatus as data to be written by the write processing section. An ejection process control section controls timing at which the write processing section begins writing on the basis of an amount of the data, of the ejection object data, which is stored in the storage apparatus and an amount of remaining data, of the ejection object data, which is to be read out by the read processing section from the portable record mediums.

Abstract: A tape library control apparatus includes a storage for storing configuration information, a diagnostic evaluator, and a command controller. A tape library apparatus includes may include a plurality of tape drives and a plurality of magnetic tapes which includes specific magnetic tapes assigned for respective pieces of data specified by each data request issued by a host computer and a common magnetic tape provided for writing the respective pieces of the data. The diagnostic evaluator determines a use mode of the tape library apparatus on the basis of the configuration information. When the total number of the specific magnetic tapes is higher than the number of available tape drives, the use mode is determined and a command is issued to the tape library apparatus from the command controller to write data to the specific magnetic tape and to write to the common magnetic tape the respective pieces of the data.

Abstract: A control apparatus connectable to a memory unit for storing data, for controlling a first tape writing unit including a plurality of first tapes and a second tape writing unit including a plurality of second tapes so that the first and second writing units write same data stored in the memory unit to one of the first tapes and one of the second tapes, respectively, has an obtaining unit for obtaining a progress value indicating a progress of writing data into the one of the second tapes upon completely writing the data into one of the first tapes and a controller for controlling the first and the second tape writing units so that the first and the second writing unit change the writing tapes to another of the first tapes and another of second tapes when the progress value being not more than a predetermined value.

Abstract: In a storage system, a disk device performs recovery and transfers read data to a control device, and the control device judges the validity of the recovery to prevent a transfer of erroneous data. A control device read-accesses a disk device, and the disk device returns read data and a recovered read error response. A control device, at the time of an initial recovered read error, performs a retry of a similar command, and if an error does not occur for read commands including the retry read command, judges the data to be valid. Uncertain data (suspect data) upon occurrence of a recovered read error is restored through disk retry, and accurate read data can be transferred to the host.

Abstract: In a hierarchical storage system, a primary storage device interposed between a secondary storage device and a data processing apparatus has a restoring unit. When at least two current storage units, which configure a logical volume and are in the mirroring relationship, concurrently fail, the restoring unit reads out data recorded in a logical volume of the current storage units from a virtual logical volume of the secondary storage device, records the data on the at least two spare storage units, thereby restoring, on the spare storage units, the logical volume of the current storage units. Even when a plurality of storages configuring a logical volume and being in the mirroring relationship concurrently fail, it is possible to immediately restore the logical volume without the maintenance operation or the like.

Abstract: The present invention relates a method and system for garbage collection of a magnetic tape, and it is an object of the present invention to provide a method and system for garbage collection of a magnetic tape, which are capable of efficiently executing a garbage collection. A tape library device connected with a magnetic disk device. The tape library device includes at least two magnetic tape media being capable of storing data and first controller for controlling transfer information and storing information. The magnetic disc device includes a magnetic disc being capable of storing data and second controller for controlling transfer information and storing information.

Abstract: In a storage system, a disk device performs recovery and transfers read data to a control device, and the control device judges the validity of the recovery to prevent a transfer of erroneous data. A control device read-accesses a disk device, and the disk device returns read data and a recovered read error response. A control device, at the time of an initial recovered read error, performs a retry of a similar command, and if an error does not occur for read commands including the retry read command, judges the data to be valid. Uncertain data (suspect data) upon occurrence of a recovered read error is restored through disk retry, and accurate read data can be transferred to the host.

Abstract: In a hierarchical storage system, a primary storage device interposed between a secondary storage device and a data processing apparatus has a restoring unit. When at least two current storage units, which configure a logical volume and are in the mirroring relationship, concurrently fail, the restoring unit reads out data recorded in a logical volume of the current storage units from a virtual logical volume of the secondary storage device, records the data on the at least two spare storage units, thereby restoring, on the spare storage units, the logical volume of the current storage units. Even when a plurality of storages configuring a logical volume and being in the mirroring relationship concurrently fail, it is possible to immediately restore the logical volume without the maintenance operation or the like.