From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E926AC43334 for ; Sun, 19 Jun 2022 19:06:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234749AbiFSTG1 (ORCPT ); Sun, 19 Jun 2022 15:06:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234744AbiFSTGZ (ORCPT ); Sun, 19 Jun 2022 15:06:25 -0400 Received: from mail-lj1-x22d.google.com (mail-lj1-x22d.google.com [IPv6:2a00:1450:4864:20::22d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0398BBC96 for ; Sun, 19 Jun 2022 12:06:18 -0700 (PDT) Received: by mail-lj1-x22d.google.com with SMTP id g12so3670344ljk.11 for ; Sun, 19 Jun 2022 12:06:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:from:in-reply-to:content-transfer-encoding; bh=scBbDIj9mWP3zB8XUjz5GUzyssFDDqJeupgEvITJjjk=; b=MPX9sJvUamTCz64DJfYeWd2v+9mn06CRemxBl6zhJSwyIr5X/KTdE5SnhfmcLaQrzb kIbmEMTXGAJKMHc2OSCrAmJSk9mOKfJcCzLY4hgY3yIoQAlJIj7NWL0wf76GLgVXPqKP TVKiY2or9CmQC4EO3sDXFWaP6HScgqfY1RHm6mj7Re/kLxhUTTU8QhrOcB+rMb/zURry e79445ByjFtTQMqfGKgnxQWY9jaAOyaB8bggW2JB4rP2fUy83EsTkn1RzwyhhTJyJuli c6rK8pzw7mnIlsnDp2FILh7QLSTuCWeNifJQ+cTxzLfiQqvxcVjv4bAdZjEe1OsyAnOl WUKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:in-reply-to :content-transfer-encoding; bh=scBbDIj9mWP3zB8XUjz5GUzyssFDDqJeupgEvITJjjk=; b=f4SIylLJ5OoGKxMj3p07asFydPzUiX+ATE7I3FpzbPT+L+TlYkDRBt59/pkzpnW86n hghvnvAiJ1Z1na0vwSUx3U42f5RIpQZahKSG0cWENFE1rFN0GdQJU1SlKoFX9bkXmXu4 2vQQMiVvN3/DLTl5F6JrkeSpjoyRDJkw4OIbu59I4bCBcpM1Nq83lDV2liUIt6bmtBGQ Jyc7MYGBMtZ+RxU8Y5dec3YQIW4tZNhqapDc1g2U5GJeyE7bhHaZRpyhE9Q9V3X1kUnY Myr5YssxszuN5tX+kCK5v6pOSRYSLns0Nrx9FhN76sI/GkuMNL51B1fGsoRk3kv1NzfY SzRA== X-Gm-Message-State: AJIora/AeQzK0fXPV0o0ERpcj+KcXmRG6ftTItj5GechTdVgX5Vziexv qTa4eec0++RrTGoGIR54j7Y= X-Google-Smtp-Source: AGRyM1vecv+pUtBS4+arQshXOjhfgLJYqNFyHndmFF3mVgXW+Uch4apwYVFzarLjg6BlFN/Q+7PVvA== X-Received: by 2002:a05:651c:50a:b0:25a:65ba:9421 with SMTP id o10-20020a05651c050a00b0025a65ba9421mr3522209ljp.236.1655665576361; Sun, 19 Jun 2022 12:06:16 -0700 (PDT) Received: from ?IPV6:2a00:1370:8182:2007:9d0e:fc6f:d534:bf54? ([2a00:1370:8182:2007:9d0e:fc6f:d534:bf54]) by smtp.gmail.com with ESMTPSA id f8-20020ac25cc8000000b0047dace7c7e5sm1453934lfq.212.2022.06.19.12.06.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 19 Jun 2022 12:06:15 -0700 (PDT) Message-ID: Date: Sun, 19 Jun 2022 22:06:14 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: Problems with BTRFS formatted disk Content-Language: en-US To: "David C. Partridge" , 'Qu Wenruo' , linux-btrfs@vger.kernel.org References: <001f01d88344$ed8aa1d0$c89fe570$@perdrix.co.uk> <603196b9-fa55-f5cc-d9b5-3cf69f19c6ef@gmx.com> <000001d8837c$91bc74e0$b5355ea0$@perdrix.co.uk> <838a65c7-214b-adc1-2c9e-3923da6575e2@gmx.com> <000001d883c7$698edad0$3cac9070$@perdrix.co.uk> <000401d883cd$cc588fc0$6509af40$@perdrix.co.uk> <393cf34a-0ae9-d34c-b2bb-ea74d906dfa5@gmx.com> <000201d883db$a22686e0$e67394a0$@perdrix.co.uk> <000901d883e0$289d73b0$79d85b10$@perdrix.co.uk> <000c01d883e7$1757e570$4607b050$@perdrix.co.uk> From: Andrei Borzenkov In-Reply-To: <000c01d883e7$1757e570$4607b050$@perdrix.co.uk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 19.06.2022 17:15, David C. Partridge wrote: > I can't "grab what I can" as I don't have enough TB to copy the data I want to save ☹ > > Does it make any sense to try: > > mount -o remount,rw /mnt > btrfs subvolume delete /mnt/@ > btrfs subvolume delete /mnt/@_daily.20220525_00:11:01 > btrfs subvolume delete /mnt/@_daily.20220526_00:11:01 > btrfs subvolume delete /mnt/@_hourly.20220526_06:00:01 > btrfs subvolume delete /mnt/@_hourly.20220526_09:00:01 > btrfs subvolume delete /mnt/@_hourly.20220526_12:00:01 > > mv /mnt/@_daily.20220524_00:11:01 /mnt/@ > > or is that doomed to total failure? > > The disks behind the raid card are all Western Digital WD4001FYYG SAS drives > Is write caching enabled for these disks? I know that it is default for some RAID cards (at least, for some profiles). For disks behind RAID controller write caching is normally managed by RAID controller itself.