Date: Thu, 27 Jan 2005 10:19:05 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Karl Denninger <karl@denninger.net> Cc: freebsd-geom@freebsd.org Subject: Re: Gmirror question - what am I doing wrong? Message-ID: <20050127091905.GN795@darkness.comp.waw.pl> In-Reply-To: <20050127000529.B40650@Denninger.Net>
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[-- Attachment #1 --] On Thu, Jan 27, 2005 at 12:05:29AM -0600, Karl Denninger wrote: +> Now here's the problem. +> +> Let's say that I have the system sync'd with the larger and smaller block +> count disks online. The SMALLER one fails. I replace it, but the other +> larger disk is not available, because its in the vault. I thus replace the +> disk with the SMALLER one, but I can't attach the slice on the replacement +> disk, because that disk has a smaller capacity than the only remaining +> active mirror component, and I can't make a slice bigger than the number +> of actual blocks that exist on the drive! +> +> I'm screwed, and have no way out of this other than to ditch the entire +> scheme, manually recreate the smaller volume, copy all the data over, and +> restart gmirror from scratch. I need exact commands you use to perform this. I did small simulation of your problem (if I understand it right): I created three md(4) devices: md0 - 12MB md1 - 10MB md2 - 10MB Now, I create a mirror from two of them: # gmirror label foo /dev/md[01] My mirror size is 10MB-512B. Now I remove smaller component: # gmirror remove foo md1 And insert the second smaller component: # gmirror insert foo md2 Everything works for me. Some more notes: When you create a mirror, gmirror takes the smallest component's size as a size of the whole mirror, so you should be able to insert new components which are bigger than or equal to the smallest one (used for mirror creation). -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFB+LIJForvXbEpPzQRAhHDAJ47KTK3Kfe8E6M+0AMBbo2U9qVBPgCgyam2 QHzK63f5fEWw0Kt3eucvppc= =ZJug -----END PGP SIGNATURE-----home | help
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