Date: Thu, 1 Jun 1995 18:46:42 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: chuckr@Glue.umd.edu (Chuck Robey) Cc: jkh@freefall.cdrom.com, vince@penzance.econ.yale.edu, roberto@blaise.ibp.fr, FreeBSD-hackers@freefall.cdrom.com Subject: Re: Upgrading to 2.05A Message-ID: <199506020146.SAA06194@gndrsh.aac.dev.com> In-Reply-To: <Pine.SUN.3.91.950601204700.7037B-100000@espresso.eng.umd.edu> from "Chuck Robey" at Jun 1, 95 08:48:19 pm
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> > On Thu, 1 Jun 1995, Jordan K. Hubbard wrote: > > > > Really? I was told that the 2.05A sources would allow me to > > > upgrade but I won't get any of the disk optimizations and other things > > > without doing a full install and I would need to do a full reinstall to > > > get properly optimized and coverted to the slice code since there will > > > probably be no backwards compatibility of this in 2.1. Can anyone > > > confirm this? Jordan? Thanks. > > > > This is all true. Please folks, don't mislead people by telling them > > that "upgrades" are a simple matter of holding your left foot in the > > air while extracting the bindist over a system in single user mode > > while "Muskrat Love" is playing on the radio. Sure, it might _work_ > > but whether or not it works 100% is another matter, and WE get to pick > > up the pieces afterwards in the questions list! > > > > THERE IS NO UPGRADE PATH FROM 2.0R TO 2.0.5! I'm sorry, I wish there > > was, but there wasn't time to do the work. > > > > Jordan > > If this is true, I'm curious just what I'm gaining with the new > filesystem, besides a new way to refer to partitions. Minfree change from 5% to 8% to correct for serious over allocation problems (davidg knows more about this). Newfs parameter changes to effectivly eliminate all the rot delay optimizations that are actually slow downs for almost every modern disk on the market. A nice clean defrag'ed set of system binaries is another side effect that can be a substantial gain if you have run a few 100 make worlds on a system. [If you don't belive the last one, do a clean install on a disk then setting it running make worlds in a loop, come back after about 5 times, reboot and look at the fsck fragmentation values] -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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