From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay4-d.mail.gandi.net ([217.70.183.196]:37219 "EHLO relay4-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751790AbbFURNR convert rfc822-to-8bit (ORCPT ); Sun, 21 Jun 2015 13:13:17 -0400 Received: from mfilter45-d.gandi.net (mfilter45-d.gandi.net [217.70.178.176]) by relay4-d.mail.gandi.net (Postfix) with ESMTP id E0179172074 for ; Sun, 21 Jun 2015 19:13:15 +0200 (CEST) Received: from relay4-d.mail.gandi.net ([IPv6:::ffff:217.70.183.196]) by mfilter45-d.gandi.net (mfilter45-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id Em0pn0ubYUak for ; Sun, 21 Jun 2015 19:13:14 +0200 (CEST) Received: from zafu.localnet (AMontpellier-656-1-387-187.w90-0.abo.wanadoo.fr [90.0.115.187]) (Authenticated sender: michel@bouissou.net) by relay4-d.mail.gandi.net (Postfix) with ESMTPSA id 8E01A172081 for ; Sun, 21 Jun 2015 19:13:14 +0200 (CEST) From: =?ISO-8859-1?Q?Sw=E2mi?= Petaramesh To: Btrfs BTRFS Subject: Is there a "nossd" option ? Date: Sun, 21 Jun 2015 19:13:10 +0200 Message-ID: <1586648.BNplRrhkhg@zafu> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi, Running a 3.19 Ubuntu kernel, I'm currently budling a RAID-1 BTRFS set for which every underlying device is a LUKS-encrypted device itself built out of a bcache device comprised of a mechanical HD partition + an SSD cache partition. Looks like it's working. BUT I see that BTRFS decides by itself to mount with the "ssd" option as bcache makes it think the device is not "rotational". However I feel that a mechanical HD plus SSD bcache should probably not be "SSD-optimized" as the underlying storage is indeed mechanical and bcache already manages the SSD part optimization by itself - and I'm afraid the "SSD optimization" could actually cause the mechanical storage to end up being much more fragmented than it should... So the question is : Is there a mount option such as "nossd" that I could use to inhibit the automatic SSD "choice" that BTRFS makes ? TIA, kind regards. -- Swâmi Petaramesh http://petaramesh.org PGP 9076E32E -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in