Abstract: Data is relocated, based on an intelligent data placement algorithm, from a first storage location to a second storage location in a disk storage system. A data placement record is generated including a virtual disk location associated with the data, the second storage location, and a first sequence value. The first sequence value indicates relative sequence when compared to other sequence values. The data placement record is written to a first record location on a first tape cartridge loaded in a tape drive. The data placement records are used with data records to restore data to disk storage from tape backup.

Abstract: An apparatus, method, system, and program product are disclosed for command-based storage scenario prediction. A registration module registers a listener to receive notifications associated with a scenario, which comprises a predefined sequence of a plurality of commands. A command module determines an initial scenario sequence comprising a subset of the plurality of commands of the scenario. A monitor module detects execution of commands on a device. A notification module sends a notification to the listener in response to detecting execution of a sequence of commands comprising the initial scenario sequence. The notification includes a hint indicating to the listener to prepare for one or more remaining commands of the scenario.

Abstract: A first metadata object identifying a set of disk locations which have been written to since a previous consistency group is maintained. Backup data for the consistency group is written. Writing backup data for the consistency group includes identifying a disk location from the set of disk locations, generating a record containing the disk location, data stored at the disk location, and a consistency group value identifying the consistency group, writing the record to a record location in tape storage, and modifying a second metadata object to indicate that the record location contains the record. Records written to tape storage can be used to restore data to disk storage for a given consistency group.

Abstract: A secondary storage controller receives metadata that uniquely identifies a source volume of a primary storage controller. Data stored in the source volume of the primary storage controller is synchronously copied to a target volume of the secondary storage controller. The secondary storage controller receives a command from a primary host to write selected data to the source volume. In response to receiving the command at the secondary storage controller, the selected data is written to the target volume of the secondary storage controller.

Abstract: A command is received to copy a first extent in a source volume to a second extent in a target volume, wherein the source volume and the target volume are in a copy relationship. In response to determining that it takes longer to copy all changed data of the first extent to the second extent than to copy all of the changed data of the first extent to a third extent and to copy all other data from the second extent to the third extent, operations are performed to copy all of the changed data of from the first extent to the third extent and to copy all of the other data from the second extent to the third extent. Operations are also performed to assign the third extent to replace the second extent in the target volume.

Abstract: A metadata object identifying a set of disk locations which have been written to during a consistency group is maintained. Backup data for the consistency group is written. Writing backup data for the consistency group includes identifying a disk location from the set of disk locations, generating a record containing the disk location, data stored at the disk location, and a consistency group value identifying the consistency group, and writing the record to tape storage. Records written to tape storage can be used to restore data to disk storage for a given consistency group.

Abstract: A secondary storage controller receives metadata that uniquely identifies a source volume of a primary storage controller. Data stored in the source volume of the primary storage controller is synchronously copied to a target volume of the secondary storage controller. The secondary storage controller receives a command from a primary host to write selected data to the source volume. In response to receiving the command at the secondary storage controller, the selected data is written to the target volume of the secondary storage controller.

Abstract: A metadata object identifying a set of disk locations which have been written to during a consistency group is maintained. Backup data for the consistency group is written. Writing backup data for the consistency group includes identifying a disk location from the set of disk locations, generating a record containing the disk location, data stored at the disk location, and a consistency group value identifying the consistency group, and writing the record to tape storage. Records written to tape storage can be used to restore data to disk storage for a given consistency group.

Abstract: A method for dynamic monitoring of command line queries. The method includes receiving a command that includes a query and one or more parameters, mapping the command to a system resource, monitoring for a state change event pertaining to the system resource or a terminal event until a detection of the terminal event, and retrieving one or more characteristics of the system resource in response to detecting the state change event pertaining to the system resource. The system resource has a plurality of characteristics, each characteristic having a name and a value. A state change event corresponds to a change in one or more characteristics of a system resource.

Abstract: A command to write data to a virtual location is received at a disk storage system. The virtual location is mapped to a tape storage system. A record is generated including the data, the virtual location, and a sequence value. The sequence value indicates relative sequence when compared to other sequence values. The record is written to a record location on a tape cartridge loaded in a tape drive. Record metadata on the disk storage system is modified to indicate that the first record location contains the first record. The data on the record can be read from the tape cartridge.

Abstract: A secondary storage controller receives metadata that uniquely identifies a source volume of a primary storage controller. Data stored in the source volume of the primary storage controller is synchronously copied to a target volume of the secondary storage controller. The secondary storage controller receives a command from a primary host to write selected data to the source volume. In response to receiving the command at the secondary storage controller, the selected data is written to the target volume of the secondary storage controller.

Abstract: Data is relocated, based on an intelligent data placement algorithm, from a first storage location to a second storage location in a disk storage system. A data placement record is generated including a virtual disk location associated with the data, the second storage location, and a first sequence value. The first sequence value indicates relative sequence when compared to other sequence values. The data placement record is written to a first record location on a first tape cartridge loaded in a tape drive. The data placement records are used with data records to restore data to disk storage from tape backup.

Abstract: A primary storage controller receives an input/output (I/O) command from a host, wherein a host timestamp is associated with the I/O command. During a mirroring of storage volumes to a secondary storage controller, the primary storage controller communicates the host timestamp associated with the I/O command to the secondary storage controller, wherein mirrored copies of the storage volumes are timestamped based on at least the host timestamp and an elapsed time since a last host I/O command. A recovery is made from a failure of one or more of the storage volumes in the primary storage controller, by using the timestamped mirrored copies of the storage volumes.

Abstract: Provided are a computer program product, system, and method for asynchronous pausing of the formation of consistency groups. A first copy operation is initiated to copy the source data from the first storage to the first data copy in the second storage. A second copy operation is initiated to copy the first data copy in the second storage to a second data copy in response to forming a consistency group of the source data at the first data copy forms consistent as of a point-in-time with respect to the source data. The first copy operation is suspended to allow for further processing of the first data copy in response to completing the second copy operation. The formation of a next consistency group is restarted between the source data and the first data copy in response to receiving a resume command.

Abstract: A virtual logical unit that stores learning metadata is allocated in a first storage server having a first plurality of clusters, wherein the learning metadata indicates a type of storage device in which selected data of the first plurality of clusters of the first storage server are stored. A copy services command is received to copy the selected data from the first storage server to a second storage server having a second plurality of clusters. The virtual logical unit that stores the learning metadata is copied, from the first storage server to the second storage server, via the copy services command. Selected logical units corresponding to the selected data are copied from the first storage server to the second storage server, and the learning metadata is used to place the selected data in the type of storage device indicated by the learning metadata.

Abstract: A command to write data to a virtual location is received at a disk storage system. The virtual location is mapped to a tape storage system. A record is generated including the data, the virtual location, and a sequence value. The sequence value indicates relative sequence when compared to other sequence values. The record is written to a record location on a tape cartridge loaded in a tape drive. Record metadata on the disk storage system is modified to indicate that the first record location contains the first record. The data on the record can be read from the tape cartridge.

Abstract: Provided are a computer program product, system, and method for asynchronous pausing of the formation of consistency groups. A first copy operation is initiated to copy the source data from the first storage to the first data copy in the second storage. A second copy operation is initiated to copy the first data copy in the second storage to a second data copy in response to forming a consistency group of the source data at the first data copy forms consistent as of a point-in-time with respect to the source data. The first copy operation is suspended to allow for further processing of the first data copy in response to completing the second copy operation. The formation of a next consistency group is restarted between the source data and the first data copy in response to receiving a resume command.

Abstract: Provided are a computer program product, system, and method for using queues corresponding to attribute values and priorities associated with units of work and sub-units of the unit of work to select the units of work and their sub-units to process. There are a plurality of work unit queues, wherein each of the work unit queues are associated with different work unit attribute values that are associated with units of work, wherein a plurality of the work unit queues include records for units of work to process having work unit attribute values associated with the work unit attribute values of the work unit queues, and wherein the work unit queues are each associated with a different priority. A record for a unit of work to perform is added to the work unit queue associated with a priority and work unit attribute value associated with the work unit.

Abstract: A method for dynamic monitoring of command line queries. The method includes receiving a command that includes a query and one or more parameters, mapping the command to a system resource, monitoring for a state change event pertaining to the system resource or a terminal event until a detection of the terminal event, and retrieving one or more characteristics of the system resource in response to detecting the state change event pertaining to the system resource. The system resource has a plurality of characteristics, each characteristic having a name and a value. A state change event corresponds to a change in one or more characteristics of a system resource.

Abstract: Provided are a computer program product, system, and method for asynchronous pausing of the formation of consistency groups. A first copy operation is initiated to copy the source data from the first storage to the first data copy in the second storage. A second copy operation is initiated to copy the first data copy in the second storage to a second data copy in response to forming a consistency group of the source data at the first data copy forms consistent as of a point-in-time with respect to the source data. The first copy operation is suspended to allow for further processing of the first data copy in response to completing the second copy operation. The formation of a next consistency group is restarted between the source data and the first data copy in response to receiving a resume command.