Date: Sat, 17 Nov 2012 01:36:27 +0100 From: Mikael Fridh <frimik@gmail.com> To: Steven Schlansker <stevenschlansker@gmail.com>, freebsd-fs@freebsd.org Subject: Re: RHEL to FreeBSD file server Message-ID: <CALoBCachSLY62%2BnriepFprpRqaHcBVOJYxOcThwv6R83hbcM0g@mail.gmail.com> In-Reply-To: <16B803FB-0964-4237-8F25-291470E7EFB5@gmail.com> References: <50A130B7.4080604@cse.yorku.ca> <20121113043409.GA70601@neutralgood.org> <alpine.GSO.2.01.1211131132110.14586@freddy.simplesystems.org> <50A2B95D.4000400@cse.yorku.ca> <50A2F804.3010009@freebsd.org> <20121115001840.GA27399@FreeBSD.org> <20121115102704.6657ee52@suse3> <CACpH0Me_-MvqCbn5TmG892zUBMieOq8cDWPvxU5zLYjdPPKwXQ@mail.gmail.com> <20121116091747.2c1bfc55@suse3> <CACpH0Mc_OHhyReQmJVN2Sj3uy4swj8xQ=Y_0ntJhwFKeho-H_A@mail.gmail.com> <16B803FB-0964-4237-8F25-291470E7EFB5@gmail.com>
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On Nov 16, 2012 8:38 PM, "Steven Schlansker" <stevenschlansker@gmail.com> wrote: > > > On Nov 16, 2012, at 11:24 AM, Zaphod Beeblebrox <zbeeble@gmail.com> wrote= : > > > On Fri, Nov 16, 2012 at 3:17 AM, Rainer Duffner <rainer@ultra-secure.de= > wrote: > >> Am Fri, 16 Nov 2012 01:03:19 -0500 > >> schrieb Zaphod Beeblebrox <zbeeble@gmail.com>: > > > >>> The only price I see is $2449 on Dell's website. Ouch. For 8G. > > > >> I saw it for 1800=80 somewhere. > >> FusionIO is 10k for 320G. > >> > >> But I've never seen FusionIO used in a Fileserver - probably doesn't > >> make sense, price-wise. > >> > >> IIRC, the OP wanted to build a 16T fileserver. So he will have to spen= d > >> some cash anyway. I think it's a safe assumption that Nexenta and its > >> partners have spent quite some time evaluating the various options. > > <snip> > > go on > > to connect 24 (or 30) drives. If you're using "green" 2T's, the speed > > of 4 disks on one channel is about half of the speed of > > 1-disk-per-channel. > > <snip> > > > > The reason I say all this... is that this config runs about $3500-ish > > here in Canada (where green 2T's are ~$109). The ZeusRAM drive up > > there is 2/3 of that. > > Curious -- have you been running this setup for any length of time? There's > a fair number of horror stories about the "green" drives in particular. > > The power management is very aggressive about spin down, causing many unneeded > power on/off cycles, dramatically reducing lifespan in a RAID configuration. > > Additionally, supposedly the error recovery is inappropriate leading to drive > failure events. (I believe the feature is known as TLER, time-limited error recovery) For some drives you can fix the load cycle count issues by "flashing" (reconfiguring) the drives. My solution was Pxe booting FreeDOS and autoexecing the Idle3 utility on all drives... But I was lucky at the time to have a supported non-AHCI controller. And they were WD 2TB drives... They worked great ever since. A more recent post detailing some of this very well: http://koitsu.wordpress.com/2012/05/30/wd30ezrx-and-aggressive-head-parking= /_______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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