Abstract: Supporting multiple replication schemes across distinct network layers, including: replicating, over a first type of network messaging layer, data between a first storage system and a second storage system; selecting a different messaging layer for data replication; and replicating, over a second type of network messaging layer, data between the first storage system and the second storage system.

Abstract: Supporting multiple replication schemes across distinct network layers, including: replicating, over a first type of network messaging layer, data between a first storage system and a second storage system; selecting a different messaging layer for data replication; and replicating, over a second type of network messaging layer, data between the first storage system and the second storage system.

Abstract: Replicating a dataset in a storage system operating in a reduced power mode, including: detecting that the storage system should enter the reduced power mode; entering the reduced power mode; and performing, while in the reduced power mode, one or more data replication operations associated with the dataset, including selecting, from amongst a plurality of data communication mechanisms, a data communication mechanism to utilize for performing the one or more data replication operations.

Abstract: Supporting multiple replication schemes across distinct network layers, including: replicating, over a first type of network messaging layer, data between a first storage system and a second storage system; selecting a different messaging layer for data replication; and replicating, over a second type of network messaging layer, data between the first storage system and the second storage system.

Abstract: Selective communication protocol layering for synchronous replication, including: initiating, by a first storage system issuing a command in accordance with a first communication protocol, a connection specifying the first storage system to be a target of storage content from a second storage system; receiving, from the second storage system by the first storage system, a connection request in accordance with the first communication protocol, wherein the connection request specifies the first storage system to be a source of storage content to the second storage system; and based on both initiating the connection and receiving the connection request in accordance with the first communication protocol: establishing, by the first storage system and in accordance with a second communication protocol, both a connection for receiving storage content from the second storage system and a connection for sending storage content to the second storage system.

Abstract: Continuing replication during storage system transportation, including: replicating, between a first storage system and a second storage system, a dataset; connecting, by the first storage system during movement of the first storage system to a new physical location, to a communication network available at one or more intermediate physical locations; and continuing the replicating of the dataset between the first storage system at one or more of the intermediate physical locations and the second storage system over the communication network available at one or more of the intermediate physical locations.

Abstract: Supporting multiple replication schemes across distinct network layers, including: replicating, over a first type of network messaging layer, data between a first storage system and a second storage system; selecting a different messaging layer for data replication; and replicating, over a second type of network messaging layer, data between the first storage system and the second storage system.

Abstract: Continuing replication during storage system transportation, including: replicating, between a first storage system and a second storage system, a dataset; connecting, by the first storage system during movement of the first storage system to a new physical location, to a communication network available at one or more intermediate physical locations; and continuing the replicating of the dataset between the first storage system at one or more of the intermediate physical locations and the second storage system over the communication network available at one or more of the intermediate physical locations.

Abstract: Continuing replication during storage system transportation, including: replicating, between a first storage system and a second storage system, a dataset; connecting, by the first storage system during movement of the first storage system to a new physical location, to a communication network available at one or more intermediate physical locations; and continuing the replicating of the dataset between the first storage system at one or more of the intermediate physical locations and the second storage system over the communication network available at one or more of the intermediate physical locations.

Abstract: Replication handling during storage system transportation, including: replicating, between a first storage system and a second storage system that are both located at a first physical location, a dataset; connecting, by the first storage system and responsive to movement of the first storage system to an intermediate physical location, to a communication network available at the intermediate physical location; and continuing, between the first storage system at the intermediate physical location and the second storage system at the first physical location, replication of the dataset over the communication network available at the intermediate physical location.

Abstract: Supporting multiple replication schemes across distinct network layers, including: replicating, over a first type of network messaging layer, data between a first storage system and a second storage system; selecting a different messaging layer for data replication; and replicating, over a second type of network messaging layer, data between the first storage system and the second storage system.

Abstract: Replication handling among distinct network transfer layers, including: establishing, over a first type of network messaging layer, a communication link for replication between a first storage system and a second storage system; initiating, over a second type of network messaging layer, a configuration change to one or more aspects of the first storage system; and replicating, without disrupting the configuration change to the one or more aspects of the first storage system, data from the first storage system to the second storage system.

Abstract: Replication handling among distinct network transfer layers, including: establishing, over a first type of network messaging layer, a communication link for replication between a first storage system and a second storage system; initiating, over a second type of network messaging layer, a configuration change to one or more aspects of the first storage system; and replicating, without disrupting the configuration change to the one or more aspects of the first storage system, data from the first storage system to the second storage system.

Abstract: An automated memory cartridge system prioritizes requests for tape retrieval. The requests to transfer cartridges may be assigned a priority relating to the importance of the request. The system will recognize these requests and organize them so that higher priority requests will be executed ahead of other lower priority requests. This prioritization will be accomplished in such a manner which allows even very low priority requests to eventually be carried out.

Abstract: An automated cartridge system optimizes the time it takes to execute a series of cartridge requests. After cartridge requests are received, the library controller calculates the approximate time it will take to execute each possible sequence of pending cartridge requests. The library controller then executes the first request in the sequence of pending requests which will take the shortest elapsed time. This series of calculations and executions continues until all requests are completed. It is another object of the present invention to carry out the motion optimization in such a manner that assures that a particular cartridge request is not put off indefinitely. Each time a hand or arm is allocated to a request, all other requests waiting for these mechanisms have their calculated execution times reduced to increase the likelihood of execution.