This wait is signaled while the control file’s shared information is written to disk. This is an atomic operation protected by an enqueue (CF), so that only one session at a time can write to the entire database.
Wait Time: The wait time is the elapsed time of the write
|file#||This identifies the control file to which the session is currently writing|
|block#||Block number in the control file where the write begins. The block size is the as the physical block size of the port (usually 512 bytes, some UNIX ports have 1 or 2 Kilobytes).|
|blocks||The number of blocks that the session is trying to write|