Patent ID: 8700852
Filing Date: 2014-04-15
Classification: G06F

Abstract:
1. A computer program product for communicating with a storage device and a host system, the computer program product comprising a computer readable storage medium having computer readable program code embodied therein executed by a host adaptor and a device adaptor in a storage controller having a cache to perform operations, the operations comprising: receiving, at the host adaptor, a write request from the host system for a storage address in the storage device; sending, by the host adaptor, write information indicating the storage address updated by the write request to the device adaptor; writing, by the host adaptor, the write data to the cache; and indicating, by the device adaptor, the storage address indicated in the write information to a modified storage address list stored in the device adaptor, wherein the modified storage address list indicates modified data in the cache for storage addresses in the storage device.