From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from meiko.romanrm.net ([195.154.92.155]:38826 "EHLO meiko.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751365AbbFURbX (ORCPT ); Sun, 21 Jun 2015 13:31:23 -0400 Date: Sun, 21 Jun 2015 22:31:21 +0500 From: Roman Mamedov To: =?UTF-8?B?U3fDom1p?= Petaramesh Cc: Btrfs BTRFS Subject: Re: Is there a "nossd" option ? Message-ID: <20150621223121.617b8894@natsu> In-Reply-To: <1586648.BNplRrhkhg@zafu> References: <1586648.BNplRrhkhg@zafu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/l0TZUGRil/SmVFQVL_H040j"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/l0TZUGRil/SmVFQVL_H040j Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Sun, 21 Jun 2015 19:13:10 +0200 Sw=C3=A2mi Petaramesh wrote: > Hi, >=20 > Running a 3.19 Ubuntu kernel, >=20 > I'm currently budling a RAID-1 BTRFS set for which every underlying devic= e is=20 > a LUKS-encrypted device itself built out of a bcache device comprised of = a=20 > mechanical HD partition + an SSD cache partition. >=20 > Looks like it's working. >=20 > BUT I see that BTRFS decides by itself to mount with the "ssd" option as = =20 > bcache makes it think the device is not "rotational". >=20 > However I feel that a mechanical HD plus SSD bcache should probably not b= e=20 > "SSD-optimized" as the underlying storage is indeed mechanical and bcache= =20 > already manages the SSD part optimization by itself - and I'm afraid the = "SSD=20 > optimization" could actually cause the mechanical storage to end up being= much=20 > more fragmented than it should... >=20 > So the question is : Is there a mount option such as "nossd" that I could= use=20 > to inhibit the automatic SSD "choice" that BTRFS makes ? Yes the "nossd" option (written literally like that) does in fact exist. It would have taken you less time to try if it works, than to write this long-winded message. :) --=20 With respect, Roman --Sig_/l0TZUGRil/SmVFQVL_H040j Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlWG9OkACgkQTLKSvz+PZwguTgCfSF66/r4v+z6gJSVL0Pi3WPZ4 0YAAoJAQ3l3a6UnasXi1mBrcyEgoUllw =UN8W -----END PGP SIGNATURE----- --Sig_/l0TZUGRil/SmVFQVL_H040j-- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in