Patent ID: 9747198
Date: 2017-08-29
CPC Classifications: G06F

Claim:
1. A computer program product for processing a copy command involving at least one storage, wherein the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therein that executes to cause operations, the operations comprising: generating a point-in-time (PiT) copy establish command for a source set comprising a subset of source logical addresses in a source volume, comprising less than all source logical addresses in the source volume, in the at least one storage to copy to an indicated target set comprising a subset of target logical addresses in a target volume, comprising less than all target logical addresses in the target volume, in the at least one storage, wherein the PiT copy establish command indicates the source and target sets, wherein the source logical addresses map to source tracks in the at least one storage and wherein the target logical addresses map to target tracks; and submitting the PiT copy establish command to a copy manager to cause the copy manager to generate copy information including first copy indicators for the target set of target logical addresses to indicate to copy the source logical addresses in the source set to the target set of target logical addresses and including second copy indicators for target logical addresses in the target volume outside of the target set to which source logical addresses are not copied, wherein the copy information is generated before initiating copying of the source set of logical addresses to the target set of logical addresses.