Date: Wed, 16 Sep 2020 06:54:32 +0100 From: Steve O'Hara-Smith <steve@sohara.org> To: freebsd-questions@freebsd.org Subject: Re: partitioning server with 2 hard drives Message-ID: <20200916065432.508e19c3b9b5c0e44a72da3f@sohara.org> In-Reply-To: <CAHu1Y70fkMavOh7Dfw5j9ifC1BwihoCxCua3ufauOtTqt=v_CQ@mail.gmail.com> References: <MWHPR06MB32479D288A8D10AD73FC6A329A200@MWHPR06MB3247.namprd06.prod.outlook.com> <20200915231901.e767350415aad298732f72cc@sohara.org> <CAHu1Y70fkMavOh7Dfw5j9ifC1BwihoCxCua3ufauOtTqt=v_CQ@mail.gmail.com>
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On Tue, 15 Sep 2020 16:10:05 -0700 Michael Sierchio <kudzu@tenebras.com> wrote: > On Tue, Sep 15, 2020 at 3:19 PM Steve O'Hara-Smith <steve@sohara.org> > wrote: > > > > > > > I would go for a ZFS mirror using the rest of the drives, set up > > a weekly scrub and never worry about a drive failure again. > > > > When, not if, a drive fails, will you find one with precisely the same > geometry / capacity to replace the failed drive and remirror? Can you do You don't need to, you just need one big enough, and 1TB drives are very easy to find. > so before the other drive fails (which might be statistically likely)? Unless you do something daft like RMA the drive and wait then yes IME. > There are good online MMTDL, MTTF, MTBF numbers for various raid levels > for ZFS. None would lead me to be so glib. Well OK there are no guarantees but a mirror is orders of magnitude better than a single drive. -- Steve O'Hara-Smith <steve@sohara.org>
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