From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from luka.romanrm.net ([213.163.64.74]:42028 "EHLO luka.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750942AbaB1Eeo (ORCPT ); Thu, 27 Feb 2014 23:34:44 -0500 Date: Fri, 28 Feb 2014 10:34:36 +0600 From: Roman Mamedov To: Justin Brown Cc: linux-btrfs@vger.kernel.org Subject: Re: Help with space Message-ID: <20140228103436.2dfd2669@natsu> In-Reply-To: References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/j17P27lb20+yGo_IBO2w1aK"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/j17P27lb20+yGo_IBO2w1aK Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 27 Feb 2014 12:19:05 -0600 Justin Brown wrote: > I've a 18 tera hardware raid 5 (areca ARC-1170 w/ 8 3 gig drives) in Do you sleep well at night knowing that if one disk fails, you end up with basically a RAID0 of 7x3TB disks? And that if 2nd one encounters unreadable sector during rebuild, you lost your data? RAID5 actually stopped working 5 years ago, apparently you didn't get the memo. :) http://hardware.slashdot.org/story/08/10/21/2126252/why-raid-5-stops-workin= g-in-2009 > need of help. Disk usage (du) shows 13 tera allocated yet strangely > enough df shows approx. 780 gigs are free. It seems, somehow, btrfs > has eaten roughly 4 tera internally. I've run a scrub and a balance > usage=3D5 with no success, in fact I lost about 20 gigs after the Did you run balance with "-dusage=3D5" or "-musage=3D5"? Or both? What is the output of the balance command? > terra:/var/lib/nobody/fs/ubfterra # btrfs fi df . > Data, single: total=3D17.58TiB, used=3D17.57TiB > System, DUP: total=3D8.00MiB, used=3D1.93MiB > System, single: total=3D4.00MiB, used=3D0.00 > Metadata, DUP: total=3D392.00GiB, used=3D33.50GiB ^^^^^^^^^ If you'd use "-musage=3D5", I think this metadata reserve should have been shrunk, and you'd gain a lot more free space. But then as others mentioned it may be risky to use this FS on 32-bit at al= l, so I'd suggest trying anything else only after you reboot into a 64-bit ker= nel. --=20 With respect, Roman --Sig_/j17P27lb20+yGo_IBO2w1aK Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlMQEdwACgkQTLKSvz+PZwhoUACcCV7vNWjuVCjMtTa91hcRcHrW xtIAniV+j6mf/j9gL3jowbOqqSB5Vp+T =6pKX -----END PGP SIGNATURE----- --Sig_/j17P27lb20+yGo_IBO2w1aK--