From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <1010612597.3c3cb975632ae@www.snappymail.ca> From: IpSo Subject: Re: [linux-lvm] A way to bypass LVM and extract the raw data off? References: <1010309724.3c381a5ce8cbe@www.snappymail.ca> <1010343969.3c38a0214056f@www.snappymail.ca> <20020106152433.Q12868@lynx.no> <1010359883.3c38de4b3692f@www.snappymail.ca> <1010543196.3c3baa5c40c49@www.snappymail.ca> <20020109023404.GC1096@auctionwatch.com> <1010545378.3c3bb2e2a4dec@www.snappymail.ca> <20020109124025.O769@lynx.adilger.int> In-Reply-To: <20020109124025.O769@lynx.adilger.int> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Wed Jan 9 15:44:02 2002 List-Id: Content-Type: text/plain; charset="us-ascii" To: Andreas Dilger Cc: linux-lvm@sistina.com Quoting Andreas Dilger : > On Jan 08, 2002 19:02 -0800, IpSo wrote: > > Yup! I'm confident everything as far as the reiser filesystem is fine, > > just LVM is very confused. > > > > Device Boot Start End Blocks Id System > > /dev/hda1 * 1 507 255496+ 82 Linux swap > > /dev/hda2 508 39813 19810224 5 Extended > > /dev/hda5 508 4633 2079472+ 83 Linux > > /dev/hda6 4634 39813 17730688+ 8e Linux LVM > > > > > > > If you have the HD space, you could try dd if=/dev/hda6 > of=/some/file > > > > > > Then mount -o loop /some/file /mnt/point -t reiserfs. > > > > > > I don't think this would do any more damage. > > > > I'll give it a shot I guess, won't this loopback file contain the extra > LVM > > information and cause problems when trying to mount it though? Does the > LVM > > information take up the first 2mb or something that I could set the offset > as, > > so it doesn't carry over to the loopback file? > > No, it uses a variable amount of space. > > What you could do is try > > od -Ad -a /dev/hda6 | grep "R e I s E r 2 F s" > > and start your dd 65584 bytes before the address at the line this is > found on (it should align to an even block boundary). At the "line", I tried the command and I got about 1000+ lines that seem to match. I assume I just try from the first line minus 65584 (3276800) like you said? [root@ipso big]# od -Ad -a /dev/hda6 | grep "R e I s E r 2 F s" 3342384 bs nul soh nul R e I s E r 2 F s nul nul nul 3383344 eot nul stx nul R e I s E r 2 F s nul nul nul 3424304 eot nul stx nul R e I s E r 2 F s nul nul nul 3498032 stx nul stx nul R e I s E r 2 F s nul nul nul 3547184 eot nul stx nul R e I s E r 2 F s nul nul nul 3616816 ack nul stx nul R e I s E r 2 F s nul nul nul 3706928 nl nul stx nul R e I s E r 2 F s nul nul nul 3825712 nl nul stx nul R e I s E r 2 F s nul nul nul 3842096 dc4 nul stx nul R e I s E r 2 F s nul nul nul 3932208 dc4 nul soh nul R e I s E r 2 F s nul nul nul 3944496 dc4 nul soh nul R e I s E r 2 F s nul nul nul 3956784 dc4 nul stx nul R e I s E r 2 F s nul nul nul 4001840 dc4 nul stx nul R e I s E r 2 F s nul nul nul ... dd if=/dev/hda6 bs=512 skip=3276800 of=/big/backup_hda6.bin -rw-r--r-- 1 root root 16478502912 Jan 9 12:50 backup_hda6.bin Still won't mount the file. :( Even after a --rebuild-sb. I also tried: (/dev/hda) dd if=/dev/hda bs=512 skip=3276800 of=/big/backup_hda6.bin -rw-r--r-- 1 root root 18870119424 Jan 9 13:41 backup_hda6.bin Still no go. > > Cheers, Andreas > -- > Andreas Dilger > http://sourceforge.net/projects/ext2resize/ > http://www-mddsp.enel.ucalgary.ca/People/adilger/ > IpSo -------------------------------------------------------------------- Never worry about viruses in your Email again. Get your FREE! virus scanned Email accounts at http://snappymail.ca