From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id i9UHRnr20259 for ; Sat, 30 Oct 2004 13:27:49 -0400 Received: from eclectic.kluge.net (eclectic.kluge.net [66.92.69.221]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id i9UHRilE029352 for ; Sat, 30 Oct 2004 13:27:49 -0400 Date: Sat, 30 Oct 2004 13:27:38 -0400 From: Theo Van Dinter Subject: Re: [linux-lvm] Software raid on top of lvm logical volume Message-ID: <20041030172738.GF13737@kluge.net> References: <41801ADE.6030308@monjoin.net> <20041028011738.GD13737@kluge.net> <41814060.4040400@mikebabcock.ca> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="xpm60Y6NLyZIvZnU" Content-Disposition: inline In-Reply-To: <41814060.4040400@mikebabcock.ca> Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: LVM general discussion and development --xpm60Y6NLyZIvZnU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Oct 28, 2004 at 02:54:24PM -0400, Michael T. Babcock wrote: > >You'd usually want to make your raid devices first, then put LVM on > >top of it. I can't really think of any benefits of doing it the other > >way around. >=20 > I've thought about this numerous times -- there is the distinct resizing= =20 > advantage. Namely, if I create a software RAID partition, I can't=20 > resize it afterward without destroying it. I have for example, on=20 There's no resizing advantage at all -- if you add another disk to the LVM, you can just as easily add it to a RAID array instead. Never mind the fact that if you lose any disk in the LVM, your RAID groups = are dead (unless you split up your LVM disk, but that's what RAID does ...) LVM gives you flexibility in your disk layout, RAID gives you performance + reliability. LVM builds on RAID's features, but the other way around, RAID is undercut by LVM. > I understand this may not be optimal in some situations, but some of us= =20 > don't have thousands of dollars for SCSI HW RAID controllers. Neither do I, but this is irrelevent to the conversation. --=20 Randomly Generated Tagline: "A bride must be carried over this, but a vampire must be invited into it." - Jeopardy Answer "What is a Supermarket Spacer, Alex?" - Theo's Response --xpm60Y6NLyZIvZnU Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFBg88K7tgKAJaXVyoRAtCeAKCSn1PcYWPurtoXGT5bKlI8l+q8kgCfYrQm p6AyWCz73sL2HBEV5wiHsLg= =bp2N -----END PGP SIGNATURE----- --xpm60Y6NLyZIvZnU--