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,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 A0628C433DB for ; Mon, 22 Mar 2021 22:25:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 542C6619A3 for ; Mon, 22 Mar 2021 22:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229870AbhCVWZO (ORCPT ); Mon, 22 Mar 2021 18:25:14 -0400 Received: from mx2.suse.de ([195.135.220.15]:54306 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230292AbhCVWZD (ORCPT ); Mon, 22 Mar 2021 18:25:03 -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 2FF89AF44; Mon, 22 Mar 2021 22:25:02 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 9C790DA7AE; Mon, 22 Mar 2021 23:22:57 +0100 (CET) Date: Mon, 22 Mar 2021 23:22:57 +0100 From: David Sterba To: Forrest Aldrich Cc: linux-btrfs@vger.kernel.org Subject: Re: APFS and BTRFS Message-ID: <20210322222257.GC7604@twin.jikos.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Forrest Aldrich , linux-btrfs@vger.kernel.org References: <7ead4392-f4c2-2a5b-c104-ae8be585d49e@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <7ead4392-f4c2-2a5b-c104-ae8be585d49e@gmail.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Sat, Mar 20, 2021 at 11:22:18AM -0400, 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. Convert relies on libraries providing the API to access the source filesystems, I don't see anything like that for APFS so it would have to be written from scratch. The linux-apfs project does not seem to be active, last update 2 years ago. If it's just days of copying, I think it's the better and safer option.