From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 64EB3139083 for ; Thu, 7 Dec 2017 20:18:59 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 51F9BE0F95; Thu, 7 Dec 2017 20:18:53 +0000 (UTC) Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com [66.111.4.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 0193AE0F86 for ; Thu, 7 Dec 2017 20:18:52 +0000 (UTC) Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 1BB4220AE6 for ; Thu, 7 Dec 2017 15:18:52 -0500 (EST) Received: from frontend1 ([10.202.2.160]) by compute6.internal (MEProxy); Thu, 07 Dec 2017 15:18:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-sender :x-me-sender:x-sasl-enc; s=fm1; bh=J9NZtU/yMy8xyZdS1g1ze9/gJy1iQ M0jv5ZwKYoCt0M=; b=me+3yQra7tC+7lfw30t5651ErNNuiqmmvw7wFhhl77/uA OPaFTNheRn5W7ipvJu7L7NBCkw8LEuiPfgW7nfxTe2PI8O7mtFF1lzPGPp/BH+pN FhmXcdJW0+2gsDAPaZw0pGR7+w5MXeSUhOCNoG5RhG0sz0chqAETpomVv4GhoZAr YbggdpzD13B71MlOtc5NRZXCNhNE9bLNYpfLsl36Slv+1bB4HNDdsNe7LJSPNKPY 1ipjc97Ga+sEVR9hj5kqjnvMoLym8Z86sGUglyfCE+pjZuZb+5SsRsrX8QjWcX/a moTYgRCXwx2WS1h75z+0pydvEv11ib9x7hI33zeRQ== X-ME-Sender: Received: from localhost (unknown [185.24.122.218]) by mail.messagingengine.com (Postfix) with ESMTPA id BD5D07E7AD for ; Thu, 7 Dec 2017 15:18:51 -0500 (EST) Date: Thu, 7 Dec 2017 20:17:55 +0000 From: Richard Bradfield To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] OT: btrfs raid 5/6 Message-ID: <20171207201755.xrw3cnirejze54gc@arch.localdomain> Mail-Followup-To: gentoo-user@lists.gentoo.org References: <5A218A49.3050004@youngman.org.uk> <20171206232829.GA5249@tp> <20171207075441.rwzd5qlk7mdm7rtn@carbon> <20171207092856.GA29899@steinmetzger.isa-ilmenau.de> <1512640375.1412595.1197046296.535FF6C0@webmail.messagingengine.com> <5A2989E4.1070705@youngman.org.uk> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To:<5A2989E4.1070705@youngman.org.uk> User-Agent: NeoMutt/20171013 X-Archives-Salt: 0d72b96e-4013-4810-b9e5-1f5cf7d3ccee X-Archives-Hash: 332b139227f82dba9590786e2562e0e2 On Thu, Dec 07, 2017 at 06:35:16PM +0000, Wols Lists wrote: >On 07/12/17 09:52, Richard Bradfield wrote: >> I did also investigate USB3 external enclosures, they're pretty >> fast these days. > >AARRGGHHHHH !!! > >If you're using mdadm, DO NOT TOUCH USB WITH A BARGE POLE !!! > >I don't know the details, but I gather the problems are very similar to >the timeout problem, but much worse. > >I know the wiki says you can "get away" with USB, but only for a broken >drive, and only when recovering *from* it. > >Cheers, >Wol > I'm using ZFS on Linux, does that make you any less terrified? :) I never ended up pursuing the USB enclosure, because disks got bigger faster than I needed more storage, but I'd be interested in hearing if there are real issues with trying to mount drive arrays over XHCI, given the failure of eSATA to achieve wide adoption it looked like a good route for future expansion. -- Richard