From owner-freebsd-fs@FreeBSD.ORG Thu Nov 13 15:31:19 2008 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CF6551065674 for ; Thu, 13 Nov 2008 15:31:19 +0000 (UTC) (envelope-from ndenev@gmail.com) Received: from yw-out-2324.google.com (yw-out-2324.google.com [74.125.46.28]) by mx1.freebsd.org (Postfix) with ESMTP id 840988FC12 for ; Thu, 13 Nov 2008 15:31:19 +0000 (UTC) (envelope-from ndenev@gmail.com) Received: by yw-out-2324.google.com with SMTP id 9so412516ywe.13 for ; Thu, 13 Nov 2008 07:31:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:cc:message-id:from:to :in-reply-to:content-type:content-transfer-encoding:mime-version :subject:date:references:x-pgp-agent:x-mailer; bh=ctg0OpkmrRsFeUfU/6qX5CbQMTncGNmDRUb4qc+CRBM=; b=qvmqylTjwbKsb0GPQ2QpHlliSOGEoGMOj5eopmB9eOlp5jkmmd393o3kMG1QEHibQd cD8dAQUXvnq55mhYfuX1VB4sWu2eeHKT22+3EFGHbLAUyCTevwMinH8Dn6HUdcJH+v12 0rhPmrbDMgnoBhvWrCplXdpBaOsKkQA9r0ItI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=cc:message-id:from:to:in-reply-to:content-type :content-transfer-encoding:mime-version:subject:date:references :x-pgp-agent:x-mailer; b=l/O87vKCoCl0e6ahZZFS9+nNbhwB67oMLv89KtXdnCbGe9X6lYXiUTSSwDvXug+QeP 2VqwVWawYsIb6zVYqKtxFgcTgLODzkDBhl1Xy6gp+CiVTX/YFXADCRT/5/Oh5NdFkxPj zUuunDcMW5WZBeokqmncjcr27eP3zm9GVlR0c= Received: by 10.102.228.10 with SMTP id a10mr5855328muh.26.1226588768996; Thu, 13 Nov 2008 07:06:08 -0800 (PST) Received: from ndenev.cmotd.com (blah.sun-fish.com [217.18.249.150]) by mx.google.com with ESMTPS id w5sm47456622mue.10.2008.11.13.07.06.05 (version=TLSv1/SSLv3 cipher=RC4-MD5); Thu, 13 Nov 2008 07:06:06 -0800 (PST) Message-Id: <04B6F041-3052-4650-BE62-817E2B28D034@gmail.com> From: Nikolay Denev To: Danny Carroll In-Reply-To: <491C32BF.7020805@dannysplace.net> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Apple Message framework v929.2) Date: Thu, 13 Nov 2008 17:06:03 +0200 References: <491BBF38.9010908@dannysplace.net> <200811130657.GAA26763@sopwith.solgatos.com> <20081113074301.GA13938@icarus.home.lan> <491C32BF.7020805@dannysplace.net> X-Pgp-Agent: GPGMail d53 (v53, Leopard) X-Mailer: Apple Mail (2.929.2) Cc: freebsd-fs@freebsd.org, Jeremy Chadwick , Dieter , freebsd-hardware@freebsd.org Subject: Re: Areca vs. ZFS performance testing. X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Nov 2008 15:31:19 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 13 Nov, 2008, at 15:59 , Danny Carroll wrote: [snip] > > It is entirely possible. I do not know however if the Areca cache > works > just for Raid or also in JBOD mode. > I think some RAID controllers do not use the cache when you export the disks as pass-thru/jbod, but on some controllers you can workaround this by making every disk a RAID0(stripe) array with only one disk. Dunno if that would work on the areca... [snip] - -- Regards, Nikolay Denev -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (Darwin) iEYEARECAAYFAkkcQlsACgkQHNAJ/fLbfrkTkgCgo2NupY2Qe3TglJpoIIwne4uH VRwAnRl9p44NFxyWf9zhjrZOOImtiBAs =4Djt -----END PGP SIGNATURE-----