From owner-freebsd-stable@freebsd.org  Tue Oct  3 14:29:15 2017
Return-Path: <owner-freebsd-stable@freebsd.org>
Delivered-To: freebsd-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id B10ABE3E8A7
 for <freebsd-stable@mailman.ysv.freebsd.org>;
 Tue,  3 Oct 2017 14:29:15 +0000 (UTC) (envelope-from avg@FreeBSD.org)
Received: from citapm.icyb.net.ua (citapm.icyb.net.ua [212.40.38.140])
 by mx1.freebsd.org (Postfix) with ESMTP id 0B15176892
 for <freebsd-stable@FreeBSD.org>; Tue,  3 Oct 2017 14:29:14 +0000 (UTC)
 (envelope-from avg@FreeBSD.org)
Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua
 [212.40.38.100])
 by citapm.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id RAA13109;
 Tue, 03 Oct 2017 17:29:13 +0300 (EEST)
 (envelope-from avg@FreeBSD.org)
Received: from localhost ([127.0.0.1])
 by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD))
 id 1dzOC9-000KQN-3i; Tue, 03 Oct 2017 17:29:13 +0300
Subject: Re: panic: Solaris(panic): blkptr invalid CHECKSUM1
To: Harry Schmalzbauer <freebsd@omnilan.de>
Cc: freebsd-stable@FreeBSD.org
References: <59CFC6A6.6030600@omnilan.de> <59CFD37A.8080009@omnilan.de>
 <59D00EE5.7090701@omnilan.de>
 <493e3eec-53c6-3846-0386-d5d7f4756b11@FreeBSD.org>
 <59D28550.3070700@omnilan.de> <59D34DA0.802@omnilan.de>
 <e8d8084b-5740-2645-69ae-a4e3967c7e59@FreeBSD.org>
 <59D39C88.4040501@omnilan.de>
From: Andriy Gapon <avg@FreeBSD.org>
Message-ID: <4c144055-600c-89cf-13d5-0bf161726d1a@FreeBSD.org>
Date: Tue, 3 Oct 2017 17:28:17 +0300
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101
 Thunderbird/52.3.0
MIME-Version: 1.0
In-Reply-To: <59D39C88.4040501@omnilan.de>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-stable>, 
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 03 Oct 2017 14:29:15 -0000

On 03/10/2017 17:19, Harry Schmalzbauer wrote:
> Have tried several different txg IDs, but the latest 5 or so lead to the
> panic and some other random picked all claim missing devices...
> Doh, if I only knew about -T some days ago, when I had all 4 devices
> available.

I don't think that the error is really about the missing devices.
Most likely the real problem is that you are going too far back in history where
the data required to import the pool is not present.  It's just that there is no
special error code to report that condition distinctly, so it gets interpreted
as a missing device condition.
-F/-X/-T is not guaranteed to work as the old (freed, overwritten) data is not
kept indefinitely.


-- 
Andriy Gapon