Date: Wed, 10 Oct 2007 20:37:35 -0500 From: Eric Anderson <anderson@freebsd.org> To: John Nielsen <lists@jnielsen.net> Cc: ivoras@freebsd.org, freebsd-geom@freebsd.org Subject: Re: removing / replacing in-use components in gvirstor Message-ID: <470D7E5F.4020607@freebsd.org> In-Reply-To: <200710101817.56082.lists@jnielsen.net>
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John Nielsen wrote: > Ivan- > > I was happy to see in the FreeBSD status report that gvirstor has been > committed to CVS and will be in RELENG_7. Obviously this is great > functionality with many potential uses. Thanks for your great work and > efforts to get it committed! > > In thinking about how I personally would use it, I realized I would add > drives to a system until I ran out of slots or controller connections, and > then want to upgrade to larger drives. From the manpage (and the code) it > doesn't look like this is currently possible unless the drive you want to > replace happens to be unused. How feasible would it be to either extend > the "remove" verb to migrate in-use chunks to other (existing) providers or > create a "replace" verb to migrate in-use chunks to a new provider? I wonder if making each drive a member of a single-device mirror, and then including all the mirrors into the gvirstor GEOM would do the trick. That way, you can simply add a new drive to the mirrorset you want to replace, let the mirror sync, and then pop the old drive out. I think the only remaining step is to re-mirror the mirror, or extend the mirror or partition.. Erichelp
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