Dear Neil, Due to the mail content type, so i resend mail again, sorry. Here has a little problem about zero superblock on a non-exist device. We can reproduce this by the command: mdadm --zero-superblock /dev/sdgg The problem comes from Kill always return 1 when there is no such device, and the while loop in mdadm.c is waiting for rv == 2. So it just keep looping. Thanks. Best Regards, KueiHuan-Chen -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html