Integrity monitoring

1. A server blade comprising at least one processor and a network interface configured to be connected to a network remote to the server blade, the server blade being configured to detect a property of an entity connected to the network, the server blade being further configured as a field replaceable unit.

2. The server blade of claim 1 , comprising an enclosure which encloses the at least one processor.

3. The server blade of claim 1 , configured to detect more than one property of more than one entity connected to the network.

4. The server blade of claim 1 , configured to detect an operational status of the entity.

5. The server blade of claim 1 , configured to detect a functional status of the entity.

6. The server blade of claim 1 , configured removably to be received at a blade receiving location of a carrier having a plurality of blade receiving locations, the server blade being configured to detect a property of a further server blade received in a further blade receiving location of the carrier.

7. The server blade of claim 1 , comprising a solid state memory configured to store operating software for the server blade.

8. The server blade of claim 1 , wherein a record of a detected property is stored in a record store.

9. The server blade of claim 1 , configured to report a detected property to a management entity.

10. The server blade of claim 1 , configured as an appliance.

11. The server blade of claim 7 , configured to transmit the record to a remote record store.

12. The server blade of claim 8 , wherein server blade comprises the record store.

13. The server blade of claim 9 , configured to compare a detected property to a predetermined set of property statuses to determine whether to report a detected property to a management entity.

14. The server blade of claim 9 , comprising a management communication interface configured to transmit a report of a detected property to a management entity.

15. The server blade of claim 14 , wherein the management communication interface is distinct from the network interface.

16. A server blade comprising processor means and network interface means for connecting to a network remote to the server blade, the server blade being configured for detecting a property of an entity connected to the network, the server blade being further configured as a field replaceable unit.

17. A modular computer system comprising:

a carrier operable to removably receive a plurality of computer system modules therein;

a plurality of information processing modules removably received in the carrier, each module having a communications port operable to connect to a communications network internal to the carrier;

a switch operable to connect to the internal communications network to distribute information messages between the modules and to connect to an external communications network; and

a network monitor module removably received in the carrier and operable to connect to the internal communications network to detect a property of an entity connected to the internal communications network, to compare the detected property to a predetermined value and to perform error processing in the event a negative result from the comparison.

18. The modular computer system of claim 17 , wherein the error processing comprises making an entry in a log.

19. The modular computer system of claim 17 , further comprising a service processor operable to perform a service function for the information processing modules and wherein the error processing comprises transmitting a report to the service processor.

20. The modular computer system of claim 17 , wherein the error processing comprises transmitting a command to the entity determined to be in error.

21. The modular computer system of claim 17 , wherein the entity is an information processing module.

22. The modular computer system of claim 17 , wherein the entity is the switch.

23. The modular computer system of claim 17 , wherein the network monitor module comprises an enclosure which encloses at least one processor of the module.

24. The modular computer system of claim 17 , wherein the network monitor module is configured as an appliance.

25. The modular computer system of claim 20 , wherein the command is a command to alter a property parameter.

26. The modular computer system of claim 20 , wherein the command is a command to restart an aspect of operation.

27. A modular computer system comprising:

carrier means for removably receiving a plurality of computer system modules therein;

a plurality of information processing modules removably received in the carrier means, each module having communications means for connecting to a communications network internal to the carrier;

switch means for connecting to the internal communications network for distributing information messages between the modules and for connecting to an external communications network; and

a network monitor module removably received in the carrier means and for connecting to the internal communications network for detecting a property of an entity connected to the internal communications network, for comparing the detected property to a predetermined value and for performing error processing in the event a negative result from the comparison.