Date: Sat, 16 Jul 2005 10:56:57 -0600 (MDT) From: Rick Kelly <rmk@toad.rmkhome.com> To: bv@wjv.com Cc: freebsd-stable@freebsd.org, David Magda <dmagda@ee.ryerson.ca> Subject: Re: dangerous situation with shutdown process Message-ID: <200507161656.j6GGuv611492@toad.rmkhome.com> In-Reply-To: <20050716150302.GA7695@wjv.com>
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Bill Vermillion said: >Actually I saw that documented a very very long time ago in >an Intel Unix manual. And Intel got out of Unix in the mid to late >1980s. I don't recall if that was the one that was sold to Kodak - >the picture people - which then was sold to Interactive ?? - and >eventually wound up at Sun. There were so many Unix variants >in those days you had to have a chart to keep up with them. Each >HW manufacturer had their own version and name, and at that time >the only time you could call your OS Unix was if you compiled >it directly from the AT&T tapes with no changes on a Vax [if I >recall the scenario correctly]. The main reason for sync;sync;sync on V7 UNIX was because you couldn't do a shutdown, only a halt to the hardware monitor, on the PDP11. You can verify that behavior with SIMH. :-) -- Rick Kelly rmk@rmkhome.com <http://www.rmkhome.com/>; <http://rkba.rmkhome.com/>; - the right to keep and bear arms <http://wolf.rmkhome.com/>; - firearm forums
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