Date: Mon, 13 Sep 2004 21:35:52 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Sam <sah@softcardsystems.com> Cc: freebsd-arch@freebsd.org Subject: Re: 4.x device failure? Message-ID: <83278.1095104152@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 13 Sep 2004 15:12:17 CDT." <Pine.LNX.4.60.0409131505220.6275@athena>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <Pine.LNX.4.60.0409131505220.6275@athena>, Sam writes: >Ah. Well that answers it. I'll fail unloading of the >module if devices are open. > >This leads to a curiosity as to how the RAID >failover modules work at all. I guess if you abstract >the real disk(s) under a logical disk you can change >the bottom layer without affecting the top. I'll have >to look at that code a little closer. You should really start to study GEOM in 5.x which gives a nice clean framework for all this sort of stuff. You can start here for instance: http://phk.freebsd.dk/pubs/bsdcan-04.slides.geomtut.pdf -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?83278.1095104152>