Date: Mon, 11 Aug 2008 09:22:16 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Miroslav Lachman <000.fbsd@quip.cz> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS on whole disk vs. slice vs. partition? Message-ID: <20080811072216.GB2766@garage.freebsd.pl> In-Reply-To: <48902042.3030609@quip.cz> References: <48902042.3030609@quip.cz>
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[-- Attachment #1 --] On Wed, Jul 30, 2008 at 10:03:14AM +0200, Miroslav Lachman wrote: > Hi all, > > I am preparing myself to next try with ZFS and I would like to know if > there are any recomendations / performance differences between using > whole disk device (ad0) or slice (ad0s2) or partition (ad0s1e). > > For example, if I have machine with 2 disks and I want to setup small > part of the disk gmirrored with UFS2 (/ + /usr) and the rest of space > for data on ZFS mirror - is it better to use ad0s1 + ad1s1 for gmirror > and ad0s2 + ad1s2 for ZFS mirror? Or is it better to use ad0s1e + ad1s1e > for ZFS mirror? > > Next example could be machine with 4 disks (1TB disks in RAIDZ / RAIDZ2 > as array for backups). It would be nice to user ad0 + ad1 + ad2 + ad3, > but then I cannot boot of it, so again - I can use small piece of each > disk as bootable UFS2 root with gmirror of 4 drives (first slice of each > disk - ad0s1, ad1s1, ad2s1, ad3s1) and the rest for ZFS. Or is there > significant reason not to split disks, use whole device for ZFS pool and > setup UFS2 root on some other media like CF card with CF 2 IDE convertor? > > Thanks for any useful informations, tips, trick, links etc. There should be no difference whatsoever performance-wise between using disks, slices or partitions on FreeBSD. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFIn+ioForvXbEpPzQRAiK0AJ4leUxSsIbAfVO6Qp3epatX/sW1KQCdFSHd gnMFmWacxM/bszsxD5Ft4CA= =X3R0 -----END PGP SIGNATURE-----
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