From: utzoo!decvax!cca!obrien@RAND-UNIX@sri-unix
Newsgroups: net.unix-wizards
Title: Re: 4.1 hangs
Article-I.D.: sri-unix.1625
Posted: Thu Jun  3 13:51:22 1982
Received: Fri Jun  4 05:24:46 1982

Date: Tuesday, 18 May 1982 13:19-PDT
Sounds like there may be something wrong with disk activity.  Try
typing "dirs" or "set" or some such built-in command to the shell, to see
if it works ok when there is no disk activity required.  You may have a
flaky attention summary bit or be missing interrupts or something.  If
necessary you can put a watchdog timer in the disk driver to poke the
controller if an interrupt hasn't happened after a certain length of time.
System III does this.

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