Date: Sun, 9 Nov 2003 22:48:20 +0100 (CET) From: Lukas Ertl <l.ertl@univie.ac.at> To: David Schultz <das@FreeBSD.ORG> Cc: phk@FreeBSD.ORG Subject: Re: geom_mirror implementation Message-ID: <20031109224505.E58774@korben.in.tern> In-Reply-To: <20031109213450.GB13982@VARK.homeunix.com> References: <20031109003617.K626@korben.in.tern> <20031109023041.GA9171@VARK.homeunix.com> <20031109213450.GB13982@VARK.homeunix.com>
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On Sun, 9 Nov 2003, David Schultz wrote: > Yeah, RAID support in FreeBSD is in a rather sorry state right > now. ccd(4) doesn't work with ATAng on my machine without causing > panics and data corruption, raidframe is broken in -CURRENT, and > vinum tends to lag behind changes and break. But that doesn't > mean that the right solution is to add a *fourth* incompatible > RAID implementation. Yes, this is a good point. The advantage I see in geom_mirror is that it fits into the GEOM framework and doesn't take a lot to set up. > If there's a good reason ccd(4) is harder to fix than geom_mirror, then > you might want to talk to phk about rewriting geom_ccd based on > geom_mirror. I believe scottl and phk have plans to fix raidframe, > though, which would address a lot of the present limitations. I haven't used ccd or raidframe before, and vinum is still a lot of 'voodoo'. I just wanted to play around and do something useful; furthermore I learned a real lot about GEOM internals. regards, le -- Lukas Ertl eMail: l.ertl@univie.ac.at UNIX Systemadministrator Tel.: (+43 1) 4277-14073 Vienna University Computer Center Fax.: (+43 1) 4277-9140 University of Vienna http://mailbox.univie.ac.at/~le/
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