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Date:      Wed, 6 Jun 2012 09:49:36 +0200
From:      =?ISO-8859-1?Q?Jos=E9_Garc=EDa_Juanino?= <jjuanino@gmail.com>
To:        freebsd-fs@freebsd.org
Subject:   Re: "panic: snapblkfree: inconsistent block type" on FreeBSD 9.0 RELEASE
Message-ID:  <CAAVO5%2B%2B9P_qKjNeG6La=4Z7XcOaFwz2m8daFeQAY8vjw2k9r8w@mail.gmail.com>
In-Reply-To: <20120606082412.bd21757e.lists@yamagi.org>
References:  <CAAVO5%2BLzKnmh%2BHxaPs1PA1bA4%2BbcbijnHakW6xF72%2BJ_tGhx-A@mail.gmail.com> <CAAVO5%2BKaf348CVeP1uzfKMJ0cS34SzkXyzt1-hXRY_earV_b-A@mail.gmail.com> <op.wfdnzktr8527sy@ronaldradial.versatec.local> <20120605203718.GA2630@banach> <20120606082412.bd21757e.lists@yamagi.org>

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On 6 June 2012 08:24, Yamagi Burmeister <lists@yamagi.org> wrote:
> On Tue, 5 Jun 2012 22:37:21 +0200 Jose Garcia Juanino <jjuanino@gmail.com> wrote:
>
>> I am almost sure I have not hardware failures. Indeed, after that panic,
>> I definitively removed all the remaining snapshots, and did a new fsck on
>> the filesystems. The system now goes smoothly, and the computer does not
>> panic anymore.
>
> If you're using SU+J this is a known problem. In 9.0-RELEASE creating
> and removing snapshots on filesystems with SU+J has a high chance to
> lead to panics, filesystem corruption and several more not so nice
> things. While there were some commits in 9-STABLE in that area,
> snapshots are still not working with SU+J. They are disabled and
> an error messages is printed when you try to create one.

Thanks for your reply. No, I have not journaling activated, are
filesystems with soft updates, but no journal. I am watching the
syslog, and after a crash (4 weeks ago) I see that a filesystem was
not fully cleaned at startup:

<filesystem>: UNEXPECTED SOFT UPDATE INCONSISTENCY; RUN fsck MANUALLY.

The system stopped, and a single user shell opened. But the system
administrator at this moment simply ignored that issue, and hit "exit"
in the shell. I believe that error was the start of my headaches:
never an unclean filesystem must be mounted.

Regards



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