From owner-freebsd-fs@FreeBSD.ORG Mon Nov 24 19:40:52 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id EADA2457 for ; Mon, 24 Nov 2014 19:40:52 +0000 (UTC) Received: from mail-ob0-x232.google.com (mail-ob0-x232.google.com [IPv6:2607:f8b0:4003:c01::232]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id AE43C85E for ; Mon, 24 Nov 2014 19:40:52 +0000 (UTC) Received: by mail-ob0-f178.google.com with SMTP id gq1so7619706obb.37 for ; Mon, 24 Nov 2014 11:40:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=EhBgQtagqNl4pzv2EQOj0jijCGtz48zimcHTEQ1+DhE=; b=SxUkf6HLGodbMUNCyrVr/atdpA9qWNV0XHpydxVXHfinybKFZ3FOShNKAvH1f0wnn3 uJjwyHP/zhQ8AXD+bNImMjz4kyKbIGtATkrC4TwAP0/aIqDk27FhuUSgaFt7EUL+NF+V OaSXSsJu0yQImCi/LlhUES/DaOvNvn+Cqgui4LhwjnxFGqXGjaZjCaMIo80ur38ZC+5h HujHsHoMSDmbeN7QTux7cWDn6Ws9Cfmyg9272qGybLSBn6NydYX7SYMPXSmeDxMiOyzE eoIzzhYpscKqhNSRmGFKyNsWKO6MXXsPhcXKZxbCmCtH5Bun+vNiCcOFKNor2UdcgctB BJkg== MIME-Version: 1.0 X-Received: by 10.202.196.206 with SMTP id u197mr12795499oif.21.1416858052104; Mon, 24 Nov 2014 11:40:52 -0800 (PST) Received: by 10.76.0.138 with HTTP; Mon, 24 Nov 2014 11:40:52 -0800 (PST) Date: Mon, 24 Nov 2014 14:40:52 -0500 Message-ID: Subject: What does it mean when zdb -R x:xxx:xxx:g crashes? From: Zaphod Beeblebrox To: freebsd-fs Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Nov 2014 19:40:53 -0000 So... another barrier in figuring out my zfs problem is that zdb crashes when asked to print the gang block header: [1:97:397]root@virtual:/vr1/tmp/diag> zdb -AAA -R vr2 0:94048dc9000:24000:g Found vdev type: raidz Assertion failed: (zio->io_error == 0 || (zio->io_flags & ZIO_FLAG_CANFAIL)), file /usr/src/cddl/lib/libzpool/../../../sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c, line 3297. Abort trap (core dumped) Now... this trace looks odd to me: there are no bookmarks in the filesystem... neither are there snapshots for this specific filesystem. (gdb) bt #0 0x0000000801cb26ca in thr_kill () from /lib/libc.so.7 #1 0x0000000801d87149 in abort () from /lib/libc.so.7 #2 0x0000000801920e21 in zio_init () from /lib/libzpool.so.2 #3 0x0000000801927e0e in zbookmark_is_before () from /lib/libzpool.so.2 #4 0x0000000801922df7 in zio_execute () from /lib/libzpool.so.2 #5 0x0000000801927f11 in zbookmark_is_before () from /lib/libzpool.so.2 #6 0x0000000801922df7 in zio_execute () from /lib/libzpool.so.2 #7 0x0000000801927f11 in zbookmark_is_before () from /lib/libzpool.so.2 #8 0x0000000801922df7 in zio_execute () from /lib/libzpool.so.2 #9 0x0000000801927f11 in zbookmark_is_before () from /lib/libzpool.so.2 #10 0x0000000801922df7 in zio_execute () from /lib/libzpool.so.2 #11 0x0000000801927f11 in zbookmark_is_before () from /lib/libzpool.so.2 #12 0x0000000801922df7 in zio_execute () from /lib/libzpool.so.2 #13 0x000000080191b8d9 in taskq_create () from /lib/libzpool.so.2 #14 0x0000000800e814f5 in pthread_create () from /lib/libthr.so.3 #15 0x00007ffff6fb9000 in ?? () Cannot access memory at address 0x7ffff71b9000 Help?