System and method for unit attention handling
OwnerJohn Tyndall, Steven Justiss +1inventors
InventorsJohn Tyndall, Steven Justiss, Linlin Gao
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Abstract
Embodiments of the present invention provide a system and method for handling unit attentions. According to one embodiment of the present invention, a copy manager can receive an extended copy command and can issue a unit attention clearing command, such as the test unit ready command, to the source and destination devices listed in the extended copy command. The copy manager can further issue read commands to the source device and write commands to the destination device to copy data from the source device to the destination device according to the extended copy command.
Claims33
A method for handling unit attentions comprising:
- at a third party copy device:
- receiving an extended copy command indicating a source device and a destination device;
- issuing a first unit attention clearing command to the source device;
- issuing at least one read command to the source device;
- receiving data from the source device in response to the at least one read command;
- issuing a second unit attention clearing command to the destination device;
- and
- issuing at least one write command to the destination device to write the data received from the source device to the destination device.
A third party copy device comprising:
- a processor;
- one or more interfaces, each interface configured to couple the third party copy to a data transport medium;
- a computer readable medium containing computer instructions executable by the processor, wherein the computer executable instructions comprise instructions to:
- receive an extended copy command from a host device to copy data from the source device to the destination device;
- issue a first unit attention clearing command to a source device;
- issue at least one read command to the source device;
- receive data from the source device in response to the at least one read command;
- issue a second unit attention clearing command to a destination device;
- and
- issue at least one write command to the destination device to write the data received from the source device to the destination device.
A computer program device comprising a computer readable medium storing a set of computer instructions, wherein the set of computer instructions comprise instructions executable to:
- receive an extended copy command from a host device to copy data from a source device to the destination device;
- issue a first unit attention clearing command to a source device;
- issue at least one read command to the source device;
- receive data from the source device in response to the at least one read command;
- issue a second unit attention clearing command to a destination device;
- and
- issue at least one write command to the destination device to write the data received from the source device to the destination device.
Dependencies are inferred from the claim text.