From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hubert Kario Subject: Re: Interpreting Output of "btrfs fi show" Date: Mon, 30 Apr 2012 19:10:26 +0200 Message-ID: <4295276.7uL8mlRAJE@bursa01> References: <4F98B447.30102@ennit.de> <201204290813.48417.Martin@lichtvoll.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: linux-btrfs@vger.kernel.org To: Martin Steigerwald Return-path: In-Reply-To: <201204290813.48417.Martin@lichtvoll.de> List-ID: On Sunday 29 of April 2012 08:13:48 Martin Steigerwald wrote: > Am Donnerstag, 26. April 2012 schrieb Bart Noordervliet: > > On Thu, Apr 26, 2012 at 11:06, Thomas Rohwer wro= te: > > >> As for the two filesystems shown in btrfs fi show... I have no c= lue > > >> what that is about. Did you maybe make a mistake to create a btr= fs > > >> filesystem on the whole disk at first? > > >=20 > > > That is possible. But afterwards I certainly repartioned the devi= ce > > > and created a btrfs filesystem on /dev/sda1. Maybe this info is o= nly > > > in the partition table? I understand that I should avoid mounting > > > /dev/sda in this situation. > >=20 > > Well I think there is a btrfs superblock still present from the > > full-disk filesystem. Due to the offset of the first partition from > > the start of the disk, this superblock was not overwritten when you > > created the filesystem inside the partition. But they very much > > overlap and the full-disk superblock will probably eventually be > > overwritten by elements from the partition filesystem. How you woul= d > > go about erasing the stale superblock and whether it is safe to do = so > > I can't say though. >=20 > There is the command wipefs. Whether its safe to use here I do not kn= ow. I > wouldn=B4t try without a backup. Sorry, but I'm unable to find it. Is it a `btrfs` tool option or is it = a=20 standalone application (in similar form as is the `btrfs-zero-log`)? Regards, --=20 Hubert Kario QBS - Quality Business Software 02-656 Warszawa, ul. Ksawer=F3w 30/85 tel. +48 (22) 646-61-51, 646-74-24 www.qbs.com.pl -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html