The dm-raid45 module is shipped in the linux-ubuntu-modules-2.6.24-19-generic package, which is dependency of the 'linux-image-generic' package. And your dmesg output shows that the dm-raid45 module has been probed successfully. What is the actual problem this is causing for you? It looks to me like device-mapper looks for the module once before it's available, which generates a message, but afterwards the module loads fine and is used.
Prince,
The dm-raid45 module is shipped in the linux-ubuntu- modules- 2.6.24- 19-generic package, which is dependency of the 'linux- image-generic' package. And your dmesg output shows that the dm-raid45 module has been probed successfully. What is the actual problem this is causing for you? It looks to me like device-mapper looks for the module once before it's available, which generates a message, but afterwards the module loads fine and is used.