Abstract: The invention provides a data storage system, comprising: one or more data storage media; a midplane to which the one or more data storage media are, in use, connected; at least one input/output module for providing control of data transfer between the or each of the data storage media and one or more hosts to which, in use, the data storage system is connected; and a back-up power supply to provide power to the input/output modules in the event of a failure of regular power sources therefor, the back-up power supply being provided separately from the at least one input/output module.

Abstract: The invention provides an interconnect for a data storage system, to enable optical communication between a data storage device and a backplane to which the data storage device is in use to be connected, wherein the interconnect includes an electrical power connection for providing power to a said data storage device; and, an optical engine for generating and receiving optical signals for transmission of data between the data storage device and the backplane.

Abstract: There is disclosed apparatus for supporting a disk drive, disk drive test apparatus and a method of testing a disk drive. The apparatus for supporting a disk drive includes: a housing, a slot for receiving a disk drive, and a plurality of isolators. The slot is received in the housing and has a longitudinal axis. The isolators are disposed between the slot and the housing for isolating the slot from the housing. The isolators are arranged with respect to the longitudinal axis such that the slot has a low rotational stiffness in the direction of the longitudinal axis relative to the rotational stiffness in at least one other direction.

Abstract: There is disclosed an apparatus and method for supporting storage devices during manufacture. The apparatus includes structural members and plural slot carriers received in bays in the apparatus. Each slot carrier carries at least one slot arranged to receive a storage device, wherein the slot carriers are insertable and/or removable from the bays through apertures at the front of the apparatus. Clamp assemblies are arranged to releasably clamp the slot carrier to one or more structural members at the sides of the slot carrier.

Abstract: The present disclosure relates to an electronic apparatus (100) comprising a backplane (120) and methods of assembling and disassembling such an apparatus. The electronic apparatus (100) comprises a chassis (101) having plural walls and a circuit board (140) fastened to a wall of the chassis, a surface of the circuit board having a plurality of conductive pads (146). A backplane (120) is fastened in a received position in the chassis substantially perpendicular to the circuit board. The backplane has a connector (130) at an edge of the backplane, the connector comprising a plurality of sprung conductive elements (132,134) which extend outwards beyond the edge of the backplane to make electrical contact with respective conductive pads (146) on the circuit board.

Abstract: A data storage system and a method of cooling the data storage system are presented. The data storage system includes: an enclosure; one or more drawer structures disposed within the enclosure, wherein at least one of the drawer structures is configured to receive one or more electronic devices; and one or more temperature control elements positioned adjacent to the bottom of the at least one drawer structure, wherein at least one of the temperature control elements is arranged in use to thermally communicate with at least one of the electronic devices.

Abstract: The invention provides an optical connector for coupling with a complementary optical connector and for supporting an optical component. The connector comprises a cover moveable between a first and second position. The cover may also comprise a moveable shield and biasing components. There is also provided an optical connector assembly comprising covers that sequentially open. A PCB comprising waveguides and an optical component sub-mount for integrating with the PCB is also presented.

Abstract: The invention provides an optical connector assembly for arrangement on a first optical printed circuit board and for connecting the first optical printed circuit board to a second optical device on a second electro optical printed circuit board, the connector assembly comprising: an electrical connector; and an optical connector; the optical connector being arranged in a housing that is fixed relative to the electrical connector, the optical connector being movably mounted in the housing so that the optical connector can move relative to the electrical connection, such that when electrical connection is made, the optical connector can still move with at least three degrees of freedom.

Abstract: An apparatus for controlling the temperature of a disk drive during manufacture of the disk drive has a cell having a mounting arrangement to which a disk drive can be mounted and having walls defining a volume in which the disk drive is received when mounted to the mounting arrangement during manufacture of the disk drive. At least one wall of the cell adjacent said volume is heat conductive and is arranged such that a disk drive when received in the volume does not touch said at least one wall. An air-agitating device agitates air between the at least one wall and a disk drive when received in the volume to encourage heat transfer between said at least one wall and a disk drive when inserted into the volume. The air-agitating device is mounted so as to be vibrationally isolated from a said disk drive when mounted in the cell.

Abstract: The invention provides a data storage system for connection to a primary power source, the data storage system comprising: one or more data storage media; one or more interfaces, each interface able to connect to at least one of the data storage media so as to couple power from the primary power source to the at least one of the data storage media; one or more energy modules, each energy module being able to connect to an interface for providing back-up power to the one or more of the data storage media in the event of a failure of the primary power source.

Abstract: There is provided a method of duplicating a logical drive. The method includes sequentially copying data from a source logical drive to a destination logical drive and determining whether a write request is received to a data area on the source logical drive which has not yet been copied to the destination logical drive. If a write request is detected, the data at the write-requested data area is copied to the destination logical drive prior to executing the write request. By providing such a method, the destination logical drive can be used as the change-data store while in the process of the duplication operation, removing the need for a snapshot logical drive in the duplication process. This results in improvements in duplication speed and reduces drive wear due to the reduced number of data reads/writes.

Abstract: There is provided a method of resynchronising a previous duplication, started at a first time, of a source logical drive on a destination logical drive. The method comprises tracking changes to the data on said source logical drive since said first time and starting a resynchronisation operation at a second time later than said first time. The resynchronisation operation comprises copying data from said source logical drive to said destination logical drive by copying only data which has changed since said first time. By providing such a method, the need to copy data which has not changed since the previous duplication operation is alleviated. This reduces the time and processing required to perform the resynchronisation operation by eliminating unnecessary transfer of data which has not changed since the earlier duplication.

Abstract: The invention provides an optical waveguide and a method of making an optical waveguide. The waveguide has a curved section having an asymmetric refractive index profile, in which the refractive index varies asymmetrically across the waveguide cross-section in dependence on the radius of the curved section of the waveguide.

Abstract: An optical printed circuit board, including at least one optical waveguide for carrying optical signals on the optical printed circuit board; and a trench formed adjacent the at least one optical waveguide, wherein the trench contains a light absorptive material to absorb light that strays from the at least one waveguide.

Abstract: An apparatus is disclosed including a rack; a component mounted to the rack and a cable connected at one end to the component. A cable management assembly for managing the cable has a first end fixed relative to the component and a second end fixed relative to the rack. The cable management assembly includes a first support member having a cable attachment portion that supports the cable along a first length; and, a second support member having a cable attachment portion that supports the cable along a second length. The support members are arranged to pivot with respect to each other about a pivot axis as the component moves between received and withdrawn positions in the rack. The first and second lengths of cable are offset from each other in the direction of the pivot axis.

Abstract: A pallet for transportation and handling of goods includes a base and a deck above the base for supporting goods. The pallet includes at least one location element that is provided between the deck and the base arranged to substantially limit lateral motion of the deck relative to the base. At least one isolator is provided between the deck and the base arranged to provide shock and vibration isolation to the deck from the base. In another aspect, the pallet includes at least one isolator between the deck and the base arranged to provide shock and vibration isolation to the deck from the base, the isolator including a resilient hollow shell that is open to the atmosphere in at least one place.

Abstract: There is disclosed herein a clamp assembly and a method for clamping a disk drive to a substrate. The disk drive has a disk drive connector. The clamp assembly includes a resilient biasing element mounted to the substrate. The clamp assembly also has a substrate connector. When a disk drive connector is connected to the substrate connector, the resilient biasing element biases the disk drive and the substrate connector together.

Abstract: The invention provides a power supply system for a data storage system, the power supply system comprising: a first power supply unit for supplying power to the storage system; a second power supply unit independent from the first power supply unit for supplying power to the storage system; an auxiliary power supply; a power redundancy controller, arranged to monitor the region of an efficiency curve within which the first and/or second power supplies are operating in and control the first and second power supplies accordingly such that the either or both of the first and second power supplies are providing power at any one time, wherein in the event of failure of a power supply unit when only one of the power supply units is operating, the power redundancy controller is arranged to provide power supply to the data storage system from the auxiliary power supply.

Abstract: There is disclosed in aspects of the invention a method of evaluating the profit of a substream of encoded video data, a method of operating servers, a network and an apparatus. In the method, a data portion is identified comprising at least some of the data in the substream being evaluated; comparing a decoded version of the video with the data portion present and a decoded version of the video with the data portion removed and calculating an error metric indicative of the distortion between the two versions; and, calculating a profit for the substream dependent upon the error metric.

Abstract: A pallet for transportation and handling of goods includes a base and a deck above the base for supporting goods. The pallet includes at least one location element that is provided between the deck and the base arranged to substantially limit lateral motion of the deck relative to the base. At least one isolator is provided between the deck and the base arranged to provide shock and vibration isolation to the deck from the base. In another aspect, the pallet includes at least one isolator between the deck and the base arranged to provide shock and vibration isolation to the deck from the base, the isolator including a resilient hollow shell that is open to the atmosphere in at least one place.