Protection From Above
When Harrods needed to improve the functionality of the data centre in their flagship London store it became apparent that the existing location had reached the limit of its capability. Increased server density brings with it the dual challenges of providing more power availability and removal of greater heat levels.
on365 were called in to solve these increasingly common problems and proposed a radical solution. As no additional space was available within the store, the only way was up. And the concept of a data centre on Harrods roof was born.
An extensive structural survey was carried out to locate secure mounting points for a steel platform on which to construct the new datacentre and a custom designed modular building was commissioned. This building provided Harrods with a pre-designed fully integrated IT/datacentre solution, factory built, to a guaranteed high level of quality. The design was a modular/scalable construction to protect their investment against future change and offered low operating costs with a maintenance free design. It also offers re-locatable architecture, which protects Harrods’s investment.
The building provides NOC/bridge space, server room and plant room and air conditioned office space designed to accommodate four desks. The dividing wall between the office space and server room contains glass-viewing panels and is fully de-mountable for future flexibility.
The Server Room has been designed to easily accommodate 3 x UPS racks, 3 x battery racks, 3 x PDU racks, 4 x 750mm racks and 18 x 600mm racks. It is fitted with four outdoor DTCU15 air conditioning units operating in an N+1 configuration and one ACU contains a 5kW-heating element. Facilities to upgrade the ACU installation to a maximum of nine DTCU15 units is already built-in. The server room is fitted with an Inergen fire suppression system with the ACU control ensuring only gas recirculation is maintained after activation. The ACU also allows the gas to be exhausted to the atmosphere.
The uninterruptible load is protected by 2 APC InfraStruXure 80kW N+1 On-line series UPS scalable to 80kW N+1 offering a runtime of 5-minutes autonomy @ 0.8 P.F full load (80kVA). The batteries are 3-5 year design life and housed within their own battery enclosure. The InfraStruXure Type B UPS is housed within a 42U high Netshelter VX rack. The overall system is supplied complete with an External Maintenance Bypass Arrangement (EMBA) enclosed within the Power Distribution Unit Rack. The configuration of the Power Distribution Unit (PDU) module is to have 18 off 16A Single phase Breakers, scalable to 42 single-phase breakers. The ISX solution is installed complete with the InfraStruXure Manager and an additional Web / SNMP Interface card for Software shutdown. The installation of two 80kW N+1 InfraStruXure UPS provides a 2N+1 (2 independent fully redundant UPS solutions) UPS solution.
This arrangement delivers two separate rack level supplies via PDU1 and PDU2. The configuration guarantees 99.999% availability, approximately 5-mins per annum of planned or unplanned downtime, true Parallel Redundancy in the event of a single UPS failure or if service works are required to be carried out during the business year, available power up to 80kW 2N+1 or 130kW N+1. Provision is made within the design to upgrade by the addition of a further 70kW N+1 UPS to the 2N+1 system. Total Scalability of runtime is made available by the addition of single Battery Modules as and when required. Alarm notification and network management interfacing are included along with full rack manageability / scalability utilising the InfraStruXure Rack PDU.
The new Datacentre is fed from two totally separate electrical supplies available from the basement sub-station. These are also supported by a redundant remote generator plant. Each are rated at 630A, 400VAC 3-ph 50Hz.
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