From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:59130 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751283AbbBFArL (ORCPT ); Thu, 5 Feb 2015 19:47:11 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1YJX4e-00069O-4T for linux-btrfs@vger.kernel.org; Fri, 06 Feb 2015 01:47:08 +0100 Received: from ip18864262.dynamic.kabel-deutschland.de ([24.134.66.98]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 06 Feb 2015 01:47:08 +0100 Received: from hurikhan77 by ip18864262.dynamic.kabel-deutschland.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 06 Feb 2015 01:47:08 +0100 To: linux-btrfs@vger.kernel.org From: Kai Krakow Subject: Re: BTRFS EFI Boot question Date: Fri, 06 Feb 2015 00:54:55 +0100 Message-ID: References: <005001d0418a$e980a980$bc81fc80$@lksmith.net> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Sender: linux-btrfs-owner@vger.kernel.org List-ID: Lucas Smith schrieb: > Hey folks! > > Having a confusing question brought up to me by my Debian Testing > installer and am unsure what the implications are for it. I want to run > btrfs in RAID10 on 4x1TB WD RE3 drives. Apparently, my system is set up to > boot using EFI. Are there any reasons not to use EFI Booting in this > circumstance? I'm using UEFI boot with btrfs RAID-1 on three devices (including bcache meanwhile). It works without problems. The only caveat is, that for both, bcache and multi-device btrfs (or combination of both) you need to boot using initramfs because the kernel by itself can neither detect multi-device btrfs not initialize bcache. This applies if you want to use it for the rootfs. You are all fine if rootfs is something more traditional. My layout is having the ESP (mounted as /boot), a resume swap and bcache caching device on an SSD, the rest is 3x 1TB spinning rust with btrfs, containing root and all the other subvolumes. -- Replies to list only preferred.