Date: Sun, 9 Oct 2005 18:36:40 +0100 From: Adrian Wontroba <aw1@stade.co.uk> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-geom@FreeBSD.org Subject: Re: GEOM's RAID level support Message-ID: <20051009183640.A93357@titus.hanley.stade.co.uk> In-Reply-To: <20051008065751.GC1000@garage.freebsd.pl>; from pjd@FreeBSD.org on Sat, Oct 08, 2005 at 08:57:51AM %2B0200 References: <20051006125233.754dd00e.josh@oplink.net> <86r7aywju7.fsf@xps.des.no> <20051006200802.GL564@ratchet.nebcorp.com> <20051006201616.GE26614@garage.freebsd.pl> <20051006202700.GM564@ratchet.nebcorp.com> <20051008023521.D55180@titus.hanley.stade.co.uk> <20051008065751.GC1000@garage.freebsd.pl>
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On Sat, Oct 08, 2005 at 08:57:51AM +0200, Pawel Jakub Dawidek wrote: > On Sat, Oct 08, 2005 at 02:35:21AM +0100, Adrian Wontroba wrote: > +> mirror/gm0 COMPLETE ad4a > +> ad6a > +> ad8a > +> ad10a > > Isn't that waste of space? Yes, but it isn't a lot of space (1 GB on each of four 150 GB disks), and it gives me the comfort blanket of being able to boot from any disk. > +> At work, I've developed a makefile based version of RSE's "single disk > +> to two disk" approach. If there is any interest, I'll ask my boss if I > +> can release it. > Nice idea, but I think at this point it is too much specific for you > configuration. It'd be much useful when it will be more general somehow. The makefile I produced at work is much more general. Provided the first disk is no larger than the second, and contains a single *s1 slice, it will build an two disk system equivalent to the first, with the same partition sizes. It also has a fall back for the "almost the same size but different geometry" gotcha. I hate this ancient CHS cruft. It is being used soon after sysinstall by UNIX novices. Of course, it will probably be totally redundant once Craig makes sysinstall GEOM aware. -- Adrian Wontroba
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