Date: Sun, 29 Nov 2009 20:27:26 +0100 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Olivier Smedts <olivier@gid0.org> Cc: freebsd-fs@freebsd.org Subject: Re: raidz configuration Message-ID: <20091129192726.GX1567@garage.freebsd.pl> In-Reply-To: <367b2c980911290920x570a3164o54fb1b61a65c8189@mail.gmail.com> References: <alpine.BSF.2.00.0911281619570.1379@ibyngvyr.purzvxnyf.bet> <4B11C7A1.1040801@andric.com> <367b2c980911290920x570a3164o54fb1b61a65c8189@mail.gmail.com>
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--+te1M04ZWIfilseV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 29, 2009 at 06:20:26PM +0100, Olivier Smedts wrote: > 2009/11/29 Dimitry Andric <dimitry@andric.com>: > > On 2009-11-28 23:22, Wes Morgan wrote: > >> Simple question: > >> > >> 8 devices in a raidz2 > >> or > >> 4 devices in a raidz x 2 > > > > With the first configuration, any two drives can fail, and all data is > > still preserved. > > > > With the second configuration, if two drives fail within the same RAID > > set, you are screwed. >=20 > A raidz on top of four zfs mirrors would be better (ie raid1+0 vs raid 0+= 1). This can't be configure. And raidz is equivalent of RAID5, not RAID0. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --+te1M04ZWIfilseV Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFLEsseForvXbEpPzQRAq6zAKCMhvjBvCvsti4fPREfB7PFNRytTACbB/SZ YxAtG7FSjNfYkFGRe4BJHGE= =fOxc -----END PGP SIGNATURE----- --+te1M04ZWIfilseV--
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