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Date:      Fri, 16 Nov 2012 11:38:13 -0800
From:      Steven Schlansker <stevenschlansker@gmail.com>
To:        Zaphod Beeblebrox <zbeeble@gmail.com>
Cc:        freebsd-fs@freebsd.org, John <jwd@freebsd.org>
Subject:   Re: RHEL to FreeBSD file server
Message-ID:  <16B803FB-0964-4237-8F25-291470E7EFB5@gmail.com>
In-Reply-To: <CACpH0Mc_OHhyReQmJVN2Sj3uy4swj8xQ=Y_0ntJhwFKeho-H_A@mail.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>

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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>:
>=20
>>> The only price I see is $2449 on Dell's website.  Ouch.  For 8G.
>=20
>> I saw it for 1800=80 somewhere.
>> FusionIO is 10k for 320G.
>>=20
>> But I've never seen FusionIO used in a Fileserver - probably doesn't
>> make sense, price-wise.
>>=20
>> IIRC, the OP wanted to build a 16T fileserver. So he will have to =
spend
>> 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>
>=20
> 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)

Have you run into this?




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