From mboxrd@z Thu Jan 1 00:00:00 1970 From: Reindl Harald Subject: Re: How to backup of large md raid volumes? Date: Sat, 20 May 2017 20:11:20 +0200 Message-ID: References: <442a4af0-00d2-853d-5294-84ae0353262b@gmail.com> <28a4540b-c5ac-bd8d-c030-6d718a02fdfc@thelounge.net> <59208443.7080404@youngman.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <59208443.7080404@youngman.org.uk> Content-Language: de-CH Sender: linux-raid-owner@vger.kernel.org To: Wols Lists , Ram Ramesh , Linux Raid List-Id: linux-raid.ids Am 20.05.2017 um 20:00 schrieb Wols Lists: > On 19/05/17 06:49, Reindl Harald wrote: >> >> >> Am 18.05.2017 um 23:37 schrieb Ram Ramesh: >>> Any one have a method to backup large volumes like md raid6 (16TB)? >>> Since the backup will not fit in one disk (in many cases and mine too) >>> I am wondering, if there is a known/easy technique to backup using >>> multiple usb hard drives. I googed and found a few fancy backup >>> utils/systems like Amanda etc. They are overkill for me. I am choosing >>> not to back up simply because of the complexity of setup as the data >>> in my RAID volume is NOT precious and can be replaced with a week of >>> effort. >>> >>> If any one can think of some thing simple, please point me to it and I >>> will do the reading to figure out >> >> https://www.amazon.com/16TB-Desktop-External-Drive-WDBLWE0160JCH-NESN/dp/B01B6BN1CU >> >> >> 499$ is not that much for a 16 TB external backup disk and whn you >> format it with BTRFS and enable compression you most likely have a lot >> fo space and your backup finally is just a single rsync command > > My only reaction to that is it's not a 16TB disk. It's a 16TB raid-0 > array. We had a similar setup ages ago (when 500GB was huge) with a > 500GB external USB drive. One of the 250GB drives failed and the entire > array was lost well, it's a *backup* drive - when it's gone it's gone we are using a bunch of them with 4 TB since 2011 for offsite-backups of the whole company cluster and they are a RAID0 too