On entering server room, it's A rack straight ahead - they're not numbered so, it's 4th from right (1-counting).
Black & bright green coloured.
Physics GRID is on B rack, at far end - so relatively far away.
1U space above - used for infiniband - other RHUL switches above that to top of rack
Installation 4 x 4U.
6U free below our installation
RHUL servers below that - Nathan says these will be decommissioned soon - SB / KR to advise on timescale for possible expansion, ie reserve for planning purposes.
Log
9:30 start
10 OCF registered with rhul and arrive at huntersdale
Computers are racked, but not connected to power / network.
Infiniband switch not installed or connected.
OCF agree to install infiniband switch.
Infiniband switch takes 1U but only half transversely. Current switch has 12 ports and all 12 used. To expand require extra switch - can link to first one.
Switch on top of setup - cables can be up to 30m long apparently, so within one rack, totally fine.