From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from slmp-550-94.slc.westdc.net ([50.115.112.57]:43703 "EHLO slmp-550-94.slc.westdc.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752539AbaEVWIC convert rfc822-to-8bit (ORCPT ); Thu, 22 May 2014 18:08:02 -0400 Received: from c-75-70-18-61.hsd1.co.comcast.net ([75.70.18.61]:51622 helo=[192.168.1.145]) by slmp-550-94.slc.westdc.net with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82) (envelope-from ) id 1Wnb9b-0022rj-Vr for linux-btrfs@vger.kernel.org; Thu, 22 May 2014 16:08:01 -0600 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 6.6 \(1510\)) Subject: Re: mount hangs after disk crash (RAID-1) From: Chris Murphy In-Reply-To: <20140522185025.4c72aab9@s9> Date: Thu, 22 May 2014 16:07:58 -0600 Message-Id: References: <20140522032258.234aaab7@s9> <20140522095101.107b62e8@s9> <20140522161634.054ec95f@s9> <20140522185025.4c72aab9@s9> To: Btrfs BTRFS Sender: linux-btrfs-owner@vger.kernel.org List-ID: On May 22, 2014, at 11:50 AM, Tomasz Chmielewski wrote: >> Try -o recovery,degraded >> >> I would drop the other options for now, since they aren't necessary >> to recover from a \ device failure. > > Yes I've tried that as well, and it ends in the similar "hang" - high > IO for a while, then no IO at all, mount does not return. > > > It *does* mount as ro,degraded, but then, it's not possible to add a > disk and recover to a functioning RAID-1. > Also, when I try to remount rw, the mount command hangs as well. > > Is there anything else I can try? How much metadata is there on the volume? And how much memory does the system have? This might also be a case where it might take hours, or longer, for it sort things out, and isn't actually permanently hung up. Worth a shot to leave it overnight and see what happens. I agree trying skip_balance is worth a shot also. Chris Murphy