Date: Tue, 9 Feb 2010 11:31:55 -0500 From: "Peter C. Lai" <peter@simons-rock.edu> To: Tom Evans <tevans.uk@googlemail.com> Cc: Charles Sprickman <spork@bway.net>, FreeBSD Stable <freebsd-stable@freebsd.org>, Dan Langille <dan@langille.org> Subject: Re: hardware for home use large storage Message-ID: <20100209163155.GK4648@cesium.hyperfine.info> In-Reply-To: <2e027be01002090716y77213c45pb937e22151a2c238@mail.gmail.com> References: <4B6F9A8D.4050907@langille.org> <alpine.OSX.2.00.1002090103520.982@hotlap.local> <2e027be01002090451w2b4506a0ofb5ab55c647540a@mail.gmail.com> <a586d9acd7436f3fdab4f88114309aef.squirrel@nyi.unixathome.org> <2e027be01002090609y28be404dl1bb610d047b15f9b@mail.gmail.com> <f6a0ed0187f2e747696805773154cad9.squirrel@nyi.unixathome.org> <2e027be01002090716y77213c45pb937e22151a2c238@mail.gmail.com>
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That's faster than just about anything I have at home. So you should be fine. It should be good enough to serve as primary media center storage even (for retrievals, anyway, probably a tad bit slow for live transcoding). Also does anybody know if benching dd if=/dev/zero onto a zfs volume that has compression turned on might affect what dd (which is getting what it knows from vfs/vmm) might report? On 2010-02-09 03:16:13PM +0000, Tom Evans wrote: > On Tue, Feb 9, 2010 at 3:01 PM, Dan Langille <dan@langille.org> wrote: > > > > On Tue, February 9, 2010 9:09 am, Tom Evans wrote: > >> On Tue, Feb 9, 2010 at 1:45 PM, Dan Langille <dan@langille.org> wrote: > >> One thing to point out about using a PM like this: you won't get > >> fantastic bandwidth out of it. For my needs (home storage server), > >> this really doesn't matter, I just want oodles of online storage, with > >> redundancy and reliability. > > > > > > A PM? What's that? > > > > Yes, my priority is reliable storage. Speed is secondary. > > > > What bandwidth are you getting? > > > > PM = Port Multiplier > > I'm getting disk speed, as I only have one device behind the PM > currently (just making sure it works properly :). The limits are that > the link from siis to the PM is SATA (3Gb/s, 375MB/s), and the siis > sits on a PCIe 1x bus (2Gb/s, 250 MB/s), so the bandwidth from that is > shared amongst the up-to 5 disks behind the PM. > > Writing from /dev/zero to the pool, I get around 120MB/s. Reading from > the pool, and writing to /dev/null, I get around 170 MB/s. > > Cheers > > Tom > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" -- =========================================================== Peter C. Lai | Bard College at Simon's Rock Systems Administrator | 84 Alford Rd. Information Technology Svcs. | Gt. Barrington, MA 01230 USA peter AT simons-rock.edu | (413) 528-7428 ===========================================================
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