1. Stuart Wild. Particle Physics Group Meeting, January 2010.
Hardware Maintenance and Security Alert response At the Tier2 centre A At The
Stuart Wild.
Particle Physics Group Meeting, January 2010.

2. In-house Maintained Hardware
Worker Nodes – The Cluster did consist of 880 when at full strength, plus
a test-bed rack of nodes(20). However some have now been used as servers, and a
number have been retired.
Servers – these include the Computer Elements, Kickstart, NFS, Web, Mail,
DPM, VOMS, RT, DHCP and DNS.
Presently there are still approx 860 operational machines plus network
infrastructure, which includes 46 network switches.
Almost all of these are Dell™ PowerEdge™ SC1425 machines, and
incidentally have proved to be very reliable, running 24/7 for over 4 years.
There are also a number of Shuttle units and SuperMicro ™ machines that are
still providing various services.
The Dell service contract ran out 18 months ago and the hardware has been
maintained and serviced solely by members of the Tier2 since then.

4. The Dell™ PowerEdge™ SC1425

5. System Board Components and Connectors

6. Hardware On Maintenance Contract
The 4 X 24TB Storage Element machines that were installed by us last
year.
The new hardware that will form the upgrade of half the Cluster later
this year.
The Cisco 6509 Switch that connects all the elements of the Tier2 to
the outside world.

7. Security Alert Response.
Tier2 Cluster security.
Incident acknowledgement.
The [EGEE-SECURITY-INCIDENT ] alert details, hackers or vulnerabilities.
Investigations and the consequences of actions taken.
Status Report.