From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrej Podzimek Subject: Re: [HELP!] parent transid verify failed on 600755752960 wanted 757102 found 756726 Date: Thu, 23 Jun 2011 00:01:13 +0200 Message-ID: <4E026629.6080300@podzimek.org> References: <20110622184505.GA3837@carfax.org.uk> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="=_charon-15416-1308780075-0001-2" Cc: linux-btrfs@vger.kernel.org To: unlisted-recipients:; (no To-header on input) Return-path: In-Reply-To: List-ID: This is a MIME-formatted message. If you see this text it means that your E-mail software does not support MIME-formatted messages. --=_charon-15416-1308780075-0001-2 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Hello, I am facing the same issue on a Btrfs RAID0 with 2 drives: Label: 'root' uuid: 1e26b203-fc1e-4ebf-9551-451bd34d3ac4 Total devices 2 FS bytes used 36.14GB devid 1 size 80.43GB used 41.65GB path /dev/sda6 devid 2 size 80.43GB used 41.63GB path /dev/sdb6 Btrfs v0.19-36-g70c6c10-dirty Tried btrfs-select-super -s 1 /dev/sd[ab]6, but that does not help at all= =2E On both drives, its standard output is identical: parent transid verify failed on 576901120 wanted 70669 found 70755 btrfs-select-super: disk-io.c:412: find_and_setup_root: Assertion `!(!ro= ot->node)' failed. using SB copy 1, bytenr 67108864 This is the first error message from dmesg: [ 156.617407] parent transid verify failed on 576901120 wanted 70669 fo= und 70755 [ 156.617504] parent transid verify failed on 576901120 wanted 70669 fo= und 70755 [ 156.635322] btrfs: open_ctree failed The problem occurred shortly after this issue: http://www.mail-archive.co= m/linux-btrfs@vger.kernel.org/msg10618.html The machine booted (and worke= d normally) at least ten times between the error message and the current = problem. The kernel version was 2.6.39.1 when the first BUG message appeared in dm= esg. I downgraded to 2.6.38.8 after that and everything seemed to work fi= ne ... up to now. Any suggestions? ;-) I can always restore the data from another machine w= ith identical installation. But first of all I'd like to understand this = problem and know whether it can be dealt with somehow. 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