What process writes from data files to buffer cache?

server process

Server Process

DBWR

Yes, it is server process not DBWR

i agree it is database writer..thanks for the reply

If the data is not contained in the data buffer cache, it is the server process's responsibility to read the desired data block from a file on disk and place it in the data buffer cache.

Its server process not DBWR,

DBWR writes from database buffer cache to datafiles.

please read the question carefully. Then Ans.

Is it server process or DBWR

If it is server process kindly explain how a server process writes from datafile to buffer cache.

Please read oracle architecture

I am sure it is DBWR not the server process.

Thanks

please dont give wrong answer 

Server Processes

Oracle creates server processes to handle the requests of user processes connected to the instance. In some situations when the application and Oracle operate on the same machine, it is possible to combine the user process and corresponding server process into a single process to reduce system overhead. However, when the application and Oracle operate on different machines, a user process always communicates with Oracle through a separate server process.

Server processes (or the server portion of combined user/server processes) created on behalf of each user's application can perform one or more of the following:

• Parse and run SQL statements issued through the application

• Read necessary data blocks from datafiles on disk into the shared database buffers of the SGA, if the blocks are not already present in the SGA

• Return results in such a way that the application can process the information

It's Server Process and not DBWR

DBWR only writes to the data files. So the answer is Server Process.

server process