International Business Machines Corporation

Gary Weiss

Maor Ben-Dayan

Eitan Ben-Amos

Ehood Garmiza

Shemer Schwarz

Exemplary method, system, and computer program embodiments for facilitating information between at least one host and a storage controller operational in a data storage subsystem are provided. In one embodiment, a pseudo-volume, mappable to the at least one host and mountable as a filesystem, is initialized. The pseudo-volume is adapted for performing at least one of providing diagnostic and statistical data representative of the data storage subsystem to the at least one host, and facilitating control of at least one parameter of the storage controller.

Pseudo-volume for control and statistics of a storage controller

A Fiber Connection (FICON) information unit is received by a host processor executing a host internet protocol (IP) software library. The FICON information unit is written to a transport layer. Data including the FICON information unit is then transmitted to a storage control unit over an IP network.

Emulating FICON over IP

Exemplary method, system, and computer program product embodiments for, within a data storage system performing data mirroring, performing load balancing pursuant to completing a read request. At least one of a preferred storage controller and preferred storage device to accommodate the read request is determined by performing one of selecting a request queue having a closest offset to an offset of the read request, selecting a request queue having a most requests within a predetermined distance of the offset of the read request, selecting a request queue having a closest median offset to the offset of the read request, selecting a request queue having a closest average offset to the offset of the read request, and selecting a request queue having a predetermined additional number of entries than another request queue. The selected request queue is associated with the preferred storage controller and the preferred storage device.

Growing community of inventors

Tel Aviv, Israel

Gary Weiss