Date: Thu, 8 Aug 2002 16:30:23 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Rob Ellis <rob@web.ca> Cc: Stephen Hoover <shooverfbn@442spot.com>, Danny Pansters <danny@ricin.com>, freebsd-questions@freebsd.org Subject: Re: Questions about vinum and failure of root partition Message-ID: <20020808070022.GC8561@wantadilla.lemis.com> In-Reply-To: <20020807170209.GC53552@web.ca> References: <20020807160227.GB53552@web.ca> <MOEJLOFPGBFEEOIFFMLKIEBNDCAA.shooverfbn@442spot.com> <20020807170209.GC53552@web.ca>
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On Wednesday, 7 August 2002 at 13:02:09 -0400, Rob Ellis wrote: > On Wed, Aug 07, 2002 at 11:15:53AM -0500, Stephen Hoover wrote: >> Subject: Re: Questions about vinum and failure of root partition >> >>> i'm not sure about putting /usr on the vinum mirror as >>> i've seen recommended -- you often want /usr in >>> single user mode. >> >> Now this is getting out of my realm of experience, but why >> is that an issue? I have my /usr mirrored with vinum and when >> I dropped down to single usr mode to do an installworld for >> instance, I just start vinum and mount the volume. > > > i guess i'm anticipating having to go into single user > to deal with problems without running vinum -- for instance, > problems with vinum / remounting partitions? ... maybe > vinum is solid enough that that's not an issue... Assuming it isn't, you can still use a trick: have overlapping BSD and Vinum partitions, and ensure that at least one plex is concatenated with only a single subdisk. Vinum tells you where the subdisks are, so you can just place a disk label there. For example: 8 partitions: # size offset fstype [fsize bsize bps/cpg] a: 6289807 265 4.2BSD 0 0 0 # (Cyl. 0 - 1050*) c: 6290172 0 unused 0 0 # (Cyl. 0 - 1050*) e: 6290172 0 vinum # (Cyl. 0 - 1050*) Here partition a would coincide with the first subdisk on the e partition. > if you do want to put /usr on a vinum partition, you're back to the > bootstrapping problem -- where to install /usr during the freebsd > install, what to do with that space afterwards. The example above solves that problem as well. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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