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> References: <20050127000529.B40650@Denninger.Net>
next in thread | previous in thread | raw e-mail | index | archive | help
--24bywM+ZyrW0DJoD Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 27, 2005 at 12:05:29AM -0600, Karl Denninger wrote: +> Now here's the problem. +>=20 +> 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= =20 +> 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 replaceme= nt=20 +> 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= =20 +> of actual blocks that exist on the drive! +>=20 +> 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. =20 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). --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --24bywM+ZyrW0DJoD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFB+LIJForvXbEpPzQRAhHDAJ47KTK3Kfe8E6M+0AMBbo2U9qVBPgCgyam2 QHzK63f5fEWw0Kt3eucvppc= =ZJug -----END PGP SIGNATURE----- --24bywM+ZyrW0DJoD--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050127091905.GN795>