From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f50.google.com ([209.85.218.50]:36199 "EHLO mail-oi0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752590AbcHONkw (ORCPT ); Mon, 15 Aug 2016 09:40:52 -0400 Received: by mail-oi0-f50.google.com with SMTP id f189so59814858oig.3 for ; Mon, 15 Aug 2016 06:40:52 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <274e0a56-086f-23c4-7ae9-2b6cb68ec6c8@gmail.com> From: Chris Murphy Date: Mon, 15 Aug 2016 07:40:50 -0600 Message-ID: Subject: Re: How to stress test raid6 on 122 disk array To: Martin Cc: "Austin S. Hemmelgarn" , Chris Murphy , Btrfs BTRFS Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Mon, Aug 15, 2016 at 6:19 AM, Martin wrote: > > I have now had the first crash, can you take a look if I have provided > the needed info? > > https://bugzilla.kernel.org/show_bug.cgi?id=153141 [337406.626175] BTRFS warning (device sdq): lost page write due to IO error on /dev/sdap Anytime there's I/O related errors that you'd need to go back farther in the log to find out what really happened. You can play around with 'journalctl --since' for this. It'll accept things like -1m or -2h for "back one minute or back two hours" or also "today" "yesterday" or by explicit date and time. -- Chris Murphy