International Business Machines Corporation

Roderick G Moore

Paul Nicholas Cashman

Jonathan Ian Settle

Timothy Finbarr McCarthy

Jonathan W Short

Jonathan L Settle

Tim F McCarthy

Jon Short

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.

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

A method, apparatus and software is disclosed, for use in a computerised 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 one or more replaceable units for managing testing of one or more replacement units

Provided are a method for operating a disk array, a disk array, and a rebuilding process. The disk array comprises a plurality of data disks and a parity disk. A failed data disk in the disk array is detected and the failed data disk is isolated from the disk array. A rebuild is initiated of the data in the failed data disk to a spare data disk from data in surviving data disks comprising the at least one of the data disks that did not fail and the parity disk in the disk array. An error is detected in one of the surviving data disks. Data is read from the failed data disk. The rebuild of the failed data disk is completed using the surviving data disks, the parity disk, and the data read from the failed data disk.

Rebuilding a failed disk in a disk array

A method and system for enforcing routing in Fibre Channel Arbitrated Loop (FCAL) switch define a message route for an initiator to initiator message in a FCAL network. The message route is for the initiator to initiator message to traverse each selected switch device in the FCAL network. If the message received is an initiator to initiator message, the system and method force the message that is initiator to initiator message to adapt the defined message route. In this way, the initiator to initiator traffic is forced to traverse identified links in a switched network and can identify issues and problems associated in each of the links.

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Winchester, United Kingdom

Roderick G Moore