Date: Tue, 01 Oct 1996 13:12:51 -0700 From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org> To: Jason Thorpe <thorpej@nas.nasa.gov> Cc: Poul-Henning Kamp <phk@critter.tfs.com>, James Graham <greywolf@siva.captech.com>, "Kevin P. Neal" <kpneal@pobox.com>, hackers@freebsd.org, tech-kern@netbsd.org Subject: Re: VPS mailing list, BSD interest? Message-ID: <199610012012.NAA21625@freefall.freebsd.org> In-Reply-To: Your message of "Tue, 01 Oct 1996 11:06:17 PDT." <199610011806.LAA02439@lestat.nas.nasa.gov>
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>Just where do you propose to keep this information? > >(Hint: it's going to be machine-dependent.) VxFS runs on many different different platforms and uses this approach, but I would expect a per OS not per machine type solution. I haven't given it a tremendous amount of thought, but I assumed that it would be part of the BSD disklabel. >When you say "open the partition", which partition are you opening? > >(Hint: if you're opening /dev/sd0a, then you have to put all kinds of >crap to find the "ccd block" in the SCSI disk driver, and the IDE disk >driver, and the Xylogics disk drivers, and...) Don't these drivers already have to know how to find the BSD disklabel? >How does the way the ccd is configured not allow you to move your >disks around (to different controllers, etc.)? > >(Hint: it doesn't.) Last time I looked at CCD, it did. What I mean by moving my disks around is handling situations like, "Gee, I'm not getting enough bandwidth using only one controller here. I think I'll buy a second one and split up my disks." After turning off the machine, sticking in the new controller and messing with some cables, I should be able to simply power on the system and have everything work transparently. >Jason R. Thorpe thorpej@nas.nasa.gov >NASA Ames Research Center Home: 408.866.1912 >NAS: M/S 258-6 Work: 415.604.0935 >Moffett Field, CA 94035 Pager: 415.428.6939 -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================
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