When an inconsistency is detected in a GFS2 file system after an I/O operation, the kernel performs the withdraw operation on the local node. However, the kernel previously did not wait for an acknowledgement from the GFS control daemon (gfs_controld) before proceeding with the withdraw operation. Therefore, if a failure isolating the GFS2 file system from a data storage occurred, the kernel was not aware of this problem and an I/O operation to the shared block device may have been performed after the withdraw operation was logged as successful. This could lead to corruption of the file system or prevent the node from journal recovery. This patch modifies the GFS2 code so the withdraw operation no longer proceeds without the acknowledgement from gfs_controld, and the GFS2 file system can no longer become corrupted after performing the withdraw operation.