Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!columbia!rutgers!caip!brl-adm!brl-smoke!smoke!rbj@ICST-CMR.arpa From: rbj@ICST-CMR.arpa (Root Boy Jim) Newsgroups: net.unix-wizards Subject: Re: BSD Unix machines hanging Message-ID: <4403@brl-smoke.ARPA> Date: Tue, 7-Oct-86 10:15:21 EDT Article-I.D.: brl-smok.4403 Posted: Tue Oct 7 10:15:21 1986 Date-Received: Wed, 8-Oct-86 06:34:22 EDT Sender: news@brl-smoke.ARPA Lines: 24 In <23407@gwen.cs.purdue.edu>, you write: >We have been experiencing a rather odd and intermittant problem with >our Unix machines. It is not confined to a particular machine or Unix; >it has happened with 4.2, 4.2 NFS, and 4.3 BSD on VAX 780, 785 and >uVAX II machines. > >Symptoms: The machines appear to lock up, users cannot get characters >echoed, console is hung. In short, the machine seems dead. The only >way to recover is a reboot. > >However, the machine is still running in a sense. One can ping the >machine in question, and it responds. One can open a TCP connection to >the machine, and the connection succeeds, but hangs at that point. You didn't say what kind(s) of disks/controller(s) you have. We have an SI 9900 controller connected to a CDC 9766 (rm05) and an eagle. Every so often the controller goes out to lunch, but is fortunately awakened by flipping the controller reset switch. Anyone doing I/O thru this beast will hang until the remedy is applied. Anyone doing I/O only to our DEC Massbus rm03's will be unaffected. This is annoying, but not disasterous except when dialing in from home. (Root Boy) Jim Cottrell