From owner-freebsd-questions Mon Aug 7 17:41:49 2000 Delivered-To: freebsd-questions@freebsd.org Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80]) by hub.freebsd.org (Postfix) with ESMTP id 4FC5A37BA1A for ; Mon, 7 Aug 2000 17:41:44 -0700 (PDT) (envelope-from grog@wantadilla.lemis.com) Received: (from grog@localhost) by wantadilla.lemis.com (8.9.3/8.9.3) id KAA05947; Tue, 8 Aug 2000 10:10:09 +0930 (CST) (envelope-from grog) Date: Tue, 8 Aug 2000 10:10:09 +0930 From: Greg Lehey To: Kevin Menard Cc: freebsd-questions@FreeBSD.ORG Subject: Re: vinum beginner Message-ID: <20000808101009.C92263@wantadilla.lemis.com> References: <200008071616.AAG59766@bucket.cisco.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.4i In-Reply-To: <200008071616.AAG59766@bucket.cisco.com>; from kmenard@cisco.com on Mon, Aug 07, 2000 at 12:07:22PM -0400 Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Monday, 7 August 2000 at 12:07:22 -0400, Kevin Menard wrote: > Hi, > > I have thoroghly RTFM, but still have a question about vinum. I realize that / > cannot be mirroredd. I would imagine I would not want to mirror swap space and > /var, simply because they change so frequently and that would put unneeded > stress on the CPU. If you lose swap, you can crash your system. > Plus it really just doesn't make all that much sense to mirror > temporary data. That depends on how important it is while it's there. > My question is this though. If I have a 9770M drive, with a / = > 20M, /var = 50M, swap = 777M, and /usr = the rest, how would I go > about mirroring the rest of the drive? With 20 MB /, I don't think you'd get that far. Take at least 40 MB. And I'd be interested to know how you know that you need exactly 50 MB /var. > I mean, there's about 9 gigs of /usr data that could be mirrored. How many disks do you have? For mirroring you need at least 2. Mirroring on the same drive doesn't buy you much, just the possibility to recover from uncorrectable sector data errors. It does *significantly* add to the I/O time. > And if I changed the fs type for /usr to vinum, will that mess up > any other programs that might store data to /usr? The fs type relates to a partition, not a file system. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html Finger grog@lemis.com for PGP public key 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