Date: Tue, 17 Nov 2015 09:08:12 +0100 From: "Patrick M. Hausen" <hausen@punkt.de> To: Freddie Cash <fjwcash@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org>, freebsd-scsi@freebsd.org Subject: ZFS on labelled partitions (was: Re: LSI SAS2008 mps driver preferred firmware version) Message-ID: <878D84A9-4553-413B-ACA4-5ABF499F28C1@punkt.de> In-Reply-To: <CAOjFWZ49A8b6g=mQL3jzJaNX-Lf%2BuDCvmscyB6F4tr7Ax=HMbg@mail.gmail.com> References: <5644FF09.9090200@free.de> <CA%2BE3k93QrUFA3BvhoswkVDXh2bR2aLYG6Z0TOrisVvNL=%2BMZVA@mail.gmail.com> <56472686.5030301@free.de> <20151114143104.GA41119@in-addr.com> <7710CBCC-E68F-4454-9E29-E50ED1C6B511@sarenet.es> <CAN6yY1sH0PnnF_AGwDsA75i_Z6ptOr4J0c_Gqrt%2BRFO6eZsW-Q@mail.gmail.com> <CAOjFWZ4Js65gQZc6rbT9SKg-jZozziTa=JGpJys6HyejdgWP%2Bg@mail.gmail.com> <20151116205734.GM48728@zxy.spb.ru> <CAOjFWZ49A8b6g=mQL3jzJaNX-Lf%2BuDCvmscyB6F4tr7Ax=HMbg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] Hi, all, > Am 16.11.2015 um 22:19 schrieb Freddie Cash <fjwcash@gmail.com>: > > You label the disks as they are added to the system the first time. That > way, you always know where each disk is located, and you only deal with the > labels. we do the same for obvious reasons. But I always wonder about the possible downsides, because ZFS documentation explicitly states: ZFS operates on raw devices, so it is possible to create a storage pool comprised of logical volumes, either software or hardware. This configuration is not recommended, as ZFS works best when it uses raw physical devices. Using logical volumes might sacrifice performance, reliability, or both, and should be avoided. (from http://docs.oracle.com/cd/E19253-01/819-5461/gbcik/index.html) Can anyone shed some lght on why not using raw devices might sacrifice performance or reliability? Or is this just outdated folklore? Thanks, Patrick -- punkt.de GmbH * Kaiserallee 13a * 76133 Karlsruhe Tel. 0721 9109 0 * Fax 0721 9109 100 info@punkt.de http://www.punkt.de Gf: Jürgen Egeling AG Mannheim 108285 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQEcBAEBCgAGBQJWSuBsAAoJEJBvLuLt2olcScMH/1VvysKjTcZqVOIltP1FyZWn LzaS3uGKVPNJKYKmL6fl0oluynUhFdupvPqLT8qI5ViMe6lpA6ay9dCZ2uhdcOhS mu2qT8orRTSNWr4DZmpuH0lxulYypEcBGN0oxwokcTuv3imVE1iMSBFnUoNWS1NT cf/jBREsixk3YFr2Az7cKG80Jcnp/T2sPrTMQV1UWvkz4qe1JEUCU5VflUhPEH56 CJpp5U1647nrlvqmsv5XZgENtA3QGN2WrhFei56C1wGRkrmqDGy81WQzQAaVsPbD t6JgaOJaFKB+m4S1T3Ar0Qf96rp6/mm+/f96fCaurzK4oBuHSuuaJPs5cHUPke4= =MTIy -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?878D84A9-4553-413B-ACA4-5ABF499F28C1>