Abstract: Performing a cache only data transfer across a bus connecting a storage apparatus with a host concurrent with a period of bus availability while being incident within a time period for executing a connect host data transfer command. The time period for executing the connect host data transfer command is determined by a combination of a seek latency portion of the connect host data transfer command execution in combination with a rotation latency portion of the connect host data transfer command execution offset by a data transfer latency between the storage apparatus and the host in combination with an overhead time, wherein the overhead time is determined by a time for determining the time period for executing the connect host data transfer command in conjunction with a time for stopping an operation of the storage apparatus and transitioning to a new operation of the storage apparatus.

Abstract: Method and apparatus for transferring data between a host device and a data storage device having a first memory space and a second memory space. The first memory space employs a first command queue and a second command queue. The host issues access commands to store and retrieve data. The device stores commands in the first command queue and moves the commands to the second command queue. Write commands are removed from the first command queue and a message is sent to the host device to signal that the command has completed. Read and write commands are sorted at the second command queue for execution in an efficient order. Host transfer resources and disc transfer resources are utilized in such a way as to allow independent operation and to allow transfers using both sets of resources at once. More queue space is available for commands at the first command queue.

Abstract: Method and apparatus for transferring data between a host device and a data storage device having a first memory space and a second memory space. The first memory space employs a first command queue and a second command queue. The host issues access commands to store and retrieve data. The device stores commands in the first command queue and moves the commands to the second command queue. Write commands are removed from the first command queue and a message is sent to the host device to signal that the command has completed. Read and write commands are sorted at the second command queue for execution in an efficient order. Host transfer resources and disc transfer resources are utilized in such a way as to allow independent operation and to allow transfers using both sets of resources at once. More queue space is available for commands at the first command queue.

Abstract: Performing a cache only data transfer across a bus connecting a storage apparatus with a host concurrent with a period of bus availability while being incident within a time period for executing a connect host data transfer command. The time period for executing the connect host data transfer command is determined by a combination of a seek latency portion of the connect host data transfer command execution in combination with a rotation latency portion of the connect host data transfer command execution offset by a data transfer latency between the storage apparatus and the host in combination with an overhead time, wherein the overhead time is determined by a time for determining the time period for executing the connect host data transfer command in conjunction with a time for stopping an operation of the storage apparatus and transitioning to a new operation of the storage apparatus.