From owner-freebsd-questions@FreeBSD.ORG Tue Jan 29 02:37:19 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 2DA29367 for ; Tue, 29 Jan 2013 02:37:19 +0000 (UTC) (envelope-from mueller23@insightbb.com) Received: from mail.insightbb.com (smtp2.insight.synacor.com [208.47.185.24]) by mx1.freebsd.org (Postfix) with ESMTP id E1035EF6 for ; Tue, 29 Jan 2013 02:37:17 +0000 (UTC) X_CMAE_Category: 0,0 Undefined,Undefined X-CNFS-Analysis: v=2.0 cv=fvJelSEf c=1 sm=0 a=Dm9TOXL4taQ+Gy1KovpL+A==:17 a=B3-UUf3TchQA:10 a=DvSzqBOGy98A:10 a=pedpZTtsAAAA:8 a=wIHFKv9EmJ0A:10 a=YbCDWms8SOrd8KwtZ6cA:9 a=Dm9TOXL4taQ+Gy1KovpL+A==:117 X-CM-Score: 0 X-Scanned-by: Cloudmark Authority Engine Authentication-Results: smtp02.insight.synacor.com header.from=mueller6724@bellsouth.net; sender-id=neutral Authentication-Results: smtp02.insight.synacor.com smtp.mail=mueller23@insightbb.com; spf=softfail; sender-id=softfail Received-SPF: softfail (smtp02.insight.synacor.com: transitional domain insightbb.com does not designate 74.130.198.7 as permitted sender) Received: from [74.130.198.7] ([74.130.198.7:36529] helo=localhost) by mail.insightbb.com (envelope-from ) (ecelerity 2.2.3.49 r(42060/42061)) with ESMTP id 05/C7-10746-CD537015; Mon, 28 Jan 2013 21:37:17 -0500 Date: Mon, 28 Jan 2013 21:37:16 -0500 Message-ID: <05.C7.10746.CD537015@smtp02.insight.synacor.com> From: "Thomas Mueller" To: freebsd-questions@freebsd.org Subject: Re: ZFS - whole disk or partition or BSD slice? Cc: Volodymyr Kostyrko X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Jan 2013 02:37:19 -0000 28.01.2013 01:57, james: >I have a 9.1 system with some SATA disks in RAIDZ, upgraded from 9.0. > >The disks are all the same type, and I formatted them for FreeBSD and >put ZFS in a slice covering most of them. > >I have seen suggestions for OpenIndiana etc that it is better to let ZFS >have the whole raw disk and that this can control the way it manages the >disk writeback mode. Responses from Vladimir Kostyrko ^ : ^ My home computer is set up in the dedicated mode. No grave difference. ^ Not even a scratch. >Does this apply to FreeBSD and ZFS too? ^ No. >Presumably the disks are currently FreeBSD-specific. If I used raw >disks instead of slices, could I read them from a Solaris system too? ^ I'm mostly sure you would be able to read disks from Solaris/x86. ^ However Solaris/Sparc uses another labeling scheme. If you want to be ^ fully compatible with other system GPT is a better choice. Is GPT compatible with Solaris, can Solaris access a GPT disk? I tried OpenIndiana installable live USB stick, and my Western Digital Caviar Green 3 TB hard disk, partitioned with GPT, was not recognized or readable; same was true for Western Digital My Book Essential 3 TB USB 3.0 hard disk, also partitioned GPT. This was on amd64 system. Tom