Date: Fri, 5 Oct 2012 21:05:14 +0000 From: "Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)" <opensolarisisdeadlongliveopensolaris@nedharvey.com> To: Albert Shih <Albert.Shih@obspm.fr>, "zfs-discuss@opensolaris.org" <zfs-discuss@opensolaris.org> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: RE: [zfs-discuss] How many disk in one pool Message-ID: <D1B1A95FBDCF7341AC8EB0A97FCCC477197E4BBB@SN2PRD0410MB372.namprd04.prod.outlook.com> In-Reply-To: <20121005205748.GA39237@pcjas.obspm.fr> References: <20121005205748.GA39237@pcjas.obspm.fr>
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> From: zfs-discuss-bounces@opensolaris.org [mailto:zfs-discuss- > bounces@opensolaris.org] On Behalf Of Albert Shih >=20 > I'm actually running ZFS under FreeBSD. I've a question about how many > disks I <can> have in one pool. >=20 > At this moment I'm running with one server (FreeBSD 9.0) with 4 MD1200 > (Dell) meaning 48 disks. I've configure with 4 raidz2 in the pool (one on > each MD1200) >=20 > On what I understand I can add more more MD1200. But if I loose one > MD1200 > for any reason I lost the entire pool. >=20 > In your experience what's the <limit> ? 100 disk ? >=20 > How FreeBSD manage 100 disk ? /dev/da100 ? Correct about if you lose one storage tray you lose the pool. Ideally you = would span your redundancy across trays as well as across disks - but in yo= ur situation, 12 disks in raidz2 - and 4 trays - it's just not realistic fo= r you. You would have to significantly increase cost (not to mention rebui= ld pool) in order to keep the same available disk space and gain the redund= ancy. Go ahead and add more trays. I've never heard of any limit of number of di= sks you can have in ZFS. I'm sure there is a limit, but whatever it is, yo= u're nowhere near it.
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