International Business Machines Corporation

Roderick G C Moore

Jonathan W L Short

Timothy Finbarr McCarthy

Jonathan Ian Settle

Karl Allen Nielsen

Paul Nicholas Cashman

David Ray Kahler

Daniel S Critchley

Raymond Jepson

Jonathan W Short

Tim F McCarthy

Denis Senin

Dan Critchley

A method and a computer program product for latency measurement in an I/O operation. A storage system measures time periods taken in a write I/O operation and, using the measures time periods in the write I/O operation, the storage system monitors a delay that is caused by at least one of a host and a storage area network. A storage system measures time periods taken in a read I/O operation and, using the measures time periods in the read I/O operation, the storage system monitors a delay that is caused by at least one of a host and a storage area network in the read I/O operation.

Latency measurement in an I/O operation of computer data storage

One aspect includes an electronic device that includes a component configured to generate diagnostic information indicative of a fault occurring in the electronic device. The electronic device also includes a persistent display coupled to the component and configured to display the diagnostic information.

Robust fault diagnosis for electronic devices

A method for use in a computerized storage system comprising one or more replaceable units, for managing testing of one or more replacement units, where the storage system is automatically placed in a testing mode in response to a given unit being replaced and if testing fails the storage system automatically fails back to a service mode.

Computerised storage system comprising replaceable units for managing testing of replacement units

A method according to one embodiment includes defining a new encryption band with a length that is consistent with a redundant array of inexpensive disks (RAID) parity strip; freeing a working extent in a working stride on the RAID. In an iterative process until each stride in a source band is depleted of data: marking a source extent in a source stride from which to gather data to be re-encrypted; marking parity inconsistent in the working stride in the new encryption band; performing a second iterative process; and freeing the working extent. The second iterative process is performed until each extent in a source stride is depleted of data. Additional systems, methods and computer program products are also presented.

Methods for process key rollover/re-encryption and systems thereof

A management apparatus operable for protecting data on a failing storage device in a data processing system including a storage array having at least one of a plurality of storage devices. The management apparatus includes a receiver component for receiving a failure message indicating that the plurality of storage devices comprises the failing storage device. An analyzer component is in communication with the receiver component and responsive to receipt of the failure message, for analyzing the failure message. A sender component is in communication with the analyzer component. The sender component is adapted for, in response to the analyzer component determining the failing storage device, sending a zoning message, the zoning message instructing the storage array to isolate the failing storage device, and sending a protect message. The protect message instructs the storage array to protect data on the failing storage device.

Protection of data on failing storage devices

A method implemented in a computer infrastructure having computer executable code having programming instructions tangibly embodied on a computer readable medium. The programming instructions are operable to configure an initiator-to-initiator message route in a switched fiber channel arbitrated loop (FCAL) network such that the initiator-to-initiator message route traverses a replacement field replaceable unit (FRU). Additionally, the programming instructions are operable to transmit a verification initiator-to-initiator message along the initiator-to-initiator message route to verify proper operation of the replacement FRU.

Growing community of inventors

Bournemouth, United Kingdom

Roderick G C Moore