DIMM 4 has single-bit error

This is an Warning message that got on the Embedded Lights Out manager of an X2200M2 server:

"DIMM 4 has single-bit error"

I also have a orange flashing light on front of the server.

What does it mean exactly ?

[235 byte] By [marty-boya] at [2007-11-27 11:41:57]