--- hdparm.c
+++ hdparm.c
@@ -269,10 +269,9 @@
 void flush_buffer_cache (int fd)
 {
 	fsync (fd);				/* flush buffers */
-	if (ioctl(fd, BLKFLSBUF, NULL))		/* do it again, big time */
-		perror("BLKFLSBUF failed");
-	if (do_drive_cmd(fd, NULL) && errno != EINVAL)	/* await completion */
-		perror("HDIO_DRIVE_CMD(null) (wait for flush complete) failed");
+	ioctl(fd, BLKFLSBUF, NULL);		/* do it again, big time */
+	if (errno != EINVAL && errno != EOPNOTSUPP)
+		do_drive_cmd(fd, NULL);		/* await completion */
 }
 
 int seek_to_zero (int fd)