From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dennis Bergmann Subject: Re: Damaged super block / fs root Date: Tue, 31 May 2011 10:50:48 +0200 Message-ID: <4DE4ABE8.20902@ftml.net> References: <4DE3BEFA.7080106@ftml.net> <20110530161216.GA8002@carfax.org.uk> <4DE3CA05.6020709@ftml.net> <1306782166-sup-3731@shiny> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Cc: Chris Mason To: linux-btrfs Return-path: In-Reply-To: <1306782166-sup-3731@shiny> List-ID: Hello Chris On 30.05.2011 21:03, Chris Mason wrote: > How big is the FS? About 100 G on a 500 G partition. I would only like to recover some plain text files from it (source code), I don't need the partition to be mountable again. > What command did you use to overwrite the super > block? Please try to tell us exactly which commands were run. I had to install FreeBSD on that disk (with Linux, a btrfs partition, and several free partitions on it). When using the FreeBSD partition tool, I didn't create or delete any partitions. I only assigned a free partition to FreeBSD. When I booted later in Linux the Btrfs partition did not mount anymore. > There are other ways we can try to pull things off, but you should try > btrfsck -s 2 as well. btrfcsk -s 2 exits with: using SB copy 2, bytenr 274877906944 No valid Btrfs found on /dev/sda10