From owner-freebsd-hackers@FreeBSD.ORG Mon May 18 07:53:26 2015 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 01990810 for ; Mon, 18 May 2015 07:53:25 +0000 (UTC) Received: from mail-qc0-x230.google.com (mail-qc0-x230.google.com [IPv6:2607:f8b0:400d:c01::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B04151E8A for ; Mon, 18 May 2015 07:53:25 +0000 (UTC) Received: by qcir1 with SMTP id r1so19183127qci.3 for ; Mon, 18 May 2015 00:53:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=WwZw6hZRk3x8OlnAI4i6PIT7YAFeuHUccLlVnB+2dfo=; b=FoSPXkOYUhgT1CsPUf/BVbN95hXHeC4mFGlXFUpzULy4Gv5Ftc9QMEN4EVJOkdMAdz Df84Te7dshkN0izjmX9l3ChGWMKYmH4GtOK1qS4jfL+dU+xPcho99zKy/1E6oP54pDNh PXmtwJYxfATpM2TBsvw7rqPPxV/vD1TA36EcMQIjJviYMXwjNxdO47d/Bs7fzdYLSFjp JbdOD07VWRz+ncIa37nrz5mHoOJ+Y4ufLgU482euXkhL9gDuJ54uaXm4MRVQ1zQXIb89 y2FfE65W3NPxReRjfmKrEbKw8VFq0RFKbNLbXhoCHVldT5x8RBk1Pu6K31Jd1Cm2/g7T kPCg== X-Received: by 10.140.134.145 with SMTP id 139mr28803774qhg.6.1431935604820; Mon, 18 May 2015 00:53:24 -0700 (PDT) MIME-Version: 1.0 Sender: mozolevsky@gmail.com Received: by 10.140.102.194 with HTTP; Mon, 18 May 2015 00:52:44 -0700 (PDT) In-Reply-To: References: From: Igor Mozolevsky Date: Mon, 18 May 2015 08:52:44 +0100 X-Google-Sender-Auth: wEcRpSUvblDEG5aPUAP8u6whDOs Message-ID: Subject: Re: Got seagate archive Was: Help with 8TB Seagate Archive To: Wojciech Puchar Cc: Hackers freeBSD Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 May 2015 07:53:26 -0000 On 17 May 2015 at 23:43, Wojciech Puchar wrote: > For others interested i have this drive running in backup server now. it's > used with GEOM_ELI and UFS. > > What about performance: > > Excellent on reads. Tolerable on writes as long as you will not write more > than 10-15GB in a short time, then it REALLY slows down. > What sort of performance do you get when you use the drive as intended (i. e. tape-on-disk), either using tar or dd to raw device, i. e. where the writes are always linear and not scattered? -- Igor M.