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 053D213933E for ; Thu, 1 Jul 2021 15:01:36 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E8AA5E0887; Thu, 1 Jul 2021 15:01:27 +0000 (UTC) Received: from smtp.hosts.co.uk (smtp.hosts.co.uk [85.233.160.19]) (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 52F67E0833 for ; Thu, 1 Jul 2021 15:01:26 +0000 (UTC) Received: from host86-157-72-169.range86-157.btcentralplus.com ([86.157.72.169] helo=[192.168.1.65]) by smtp.hosts.co.uk with esmtpa (Exim) (envelope-from ) id 1lyyBx-0008KF-AU for gentoo-user@lists.gentoo.org; Thu, 01 Jul 2021 16:01:25 +0100 Subject: Re: [gentoo-user] [OT] Using an odd number of drives in ZFS RaidZ To: gentoo-user@lists.gentoo.org References: <7622209.dfAi7KttbR@robert-notebook> From: antlists Message-ID: <5d972c64-3803-9e14-9302-3cb8ca4eb09e@youngman.org.uk> Date: Thu, 1 Jul 2021 16:01:25 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 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 X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply MIME-Version: 1.0 In-Reply-To: <7622209.dfAi7KttbR@robert-notebook> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Archives-Salt: 798a8555-143e-49f6-a18e-2553f42bf5b3 X-Archives-Hash: 749c707626cee54c8b863538dbffe6b2 On 01/07/2021 14:47, Robert David wrote: > Hi Frank, > > > In any of my data arrays I have long time migrated off the RAIDZ to the > MIRROR or RAID10. You will find finally that the RAIDZ is slow and not > very flexible. Only think you gain is the extra space in constrained > array spaces. For RAID10 it is much easier to raise the size, just > resilvering to new bigger disks, removing old and expanding. The > resilvering speed is magnitude faster. > And anyway much easier to recover > in cases of failure. > ARE YOU SURE??? The standard mirror does not cope with corruption very well. Lose a disk and resilvering is fast. Corrupt the data, and you'll be tearing your hair out why things go wrong randomly, with no automated way, even once you've realised what's happened, to recover your data other than a restore from backup. > If you really need the additional space, consider adding second jbod > with another disks. That'd be my approach - migrate a load of stuff off onto another disk elsewhere, but that's not what the OP wants to do. > > Robert. > Cheers, Wol