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 X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 041BDC433ED for ; Sun, 4 Apr 2021 13:45:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFF156135D for ; Sun, 4 Apr 2021 13:45:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229788AbhDDNpZ (ORCPT ); Sun, 4 Apr 2021 09:45:25 -0400 Received: from mx2.suse.de ([195.135.220.15]:60596 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229665AbhDDNpZ (ORCPT ); Sun, 4 Apr 2021 09:45:25 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id ABEE6ABB1; Sun, 4 Apr 2021 13:45:19 +0000 (UTC) Subject: Re: APFS and BTRFS To: Forrest Aldrich , linux-btrfs@vger.kernel.org References: From: Michal Rostecki Message-ID: <110677dd-2969-c913-38d2-c9dd729afe0c@suse.de> Date: Sun, 4 Apr 2021 14:45:11 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 3/20/21 4:09 PM, Forrest Aldrich wrote: > I have a really large (3+ TB) volume I am copying to a BTRFS volume > (both over USB) which is painfully slow.  In fact, it will probably take > days to complete.   My goal is to use BTRFS on that larger USB volume > (it's an 18TB drive).... > > I don't suppose there is a way to convert APFS to BTRFS :)   I know, but > I thought I would ask as it seems like others may have a similar query. > > > Thx... Hi Forrest, No, there is no other option than copying the data. Converting partitions automatically with btrfs-convert is supported only for ext2/3/4 and reiserfs, though it's still not recommended without backups and might fail. https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs-convert Cheers, Michal