Gavin S. Johnson

Variable timeout method for improving missing-interrupt-handler operations in an environment having I/O devices shared by one or more systems

Variable timeout method in a missing-interrupt-handler for I/O requests issued by the same operating system

Control unit threshold timeout controls for software missing interrupt handlers in operating systems

Method of repositioning an I/O device to a predetermined position to retry a program without knowledge of which part of the program caused the retry

Apparatus, system, and method for data protection by a storage device

Preserving an existing volume map in re-initializing a data storage volume

Data management system, apparatus, and method to use buffered file marks

Synchronous mode replication to multiple clusters

System method and apparatus for optimal performance scaling of storage media

Program products for repositioning an input/output device without knowledge of current positioning of the device