From owner-freebsd-questions@freebsd.org Sun Dec 17 14:25:37 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 78001E8B0DB for ; Sun, 17 Dec 2017 14:25:37 +0000 (UTC) (envelope-from freebsd.ed.lists@sumeritec.com) Received: from mx6-out9.antispamcloud.com (mx6-out9.antispamcloud.com [95.211.2.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 268B371F06 for ; Sun, 17 Dec 2017 14:25:36 +0000 (UTC) (envelope-from freebsd.ed.lists@sumeritec.com) Received: from [153.92.8.106] (helo=srv31.niagahoster.com) by mx26.antispamcloud.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eQXQw-0000de-V8 for freebsd-questions@freebsd.org; Sun, 17 Dec 2017 12:48:43 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sumeritec.com; s=default; h=Content-Transfer-Encoding:Content-Type: MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=U0/NBahsAiGAM2Q3xZ2t/J/CBCpIVFqbRAEd6LhJH3k=; b=UxduVPDkp5Nziv9aEowFS7f5lB A4auSgzR3HbZJKLLIY//op8YyHKWJKr9UlHjKCfApD8boC1O8YiRtrch5ZAZNux0C5SFmpsMCeGKM RNcj47rPcGT24GY2ZXTr+0sO/fwJYzax9oOpazF7ETEOVw5J6fidAmnI5ccIz6wNP9f9UYJewawLu lJO9UcKuazi8DK0fY2OqOrNzJUFwTkZErRM8vnTCT0biUp8xh5nq2SIa/hAl68Oc3pBfFaNaNVHzv KA1oi/4cQ+iGW9Ey4OeEmIRMfKm0hSsQiTC1vHj4gUEfzq/GScVO/bTU442kxd5K9h6KHMhKkBmDj B+kqlAlg==; Received: from [114.125.105.130] (port=19211 helo=X220.sumeritec.com) by srv31.niagahoster.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eQXQC-0009k3-Ca; Sun, 17 Dec 2017 18:47:56 +0700 Date: Sun, 17 Dec 2017 19:47:53 +0800 From: Erich Dollansky To: RW via freebsd-questions Cc: RW Subject: Re: hd firecuda Message-ID: <20171217194753.3ab59e6d.freebsd.ed.lists@sumeritec.com> In-Reply-To: <20171217111319.6a1af590@gumby.homeunix.com> References: <1513447749.62024.1.camel@yandex.com> <20171217112428.150d8041.freebsd.ed.lists@sumeritec.com> <20171217111319.6a1af590@gumby.homeunix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-AuthUser: freebsd.ed.lists@sumeritec.com X-Originating-IP: 153.92.8.106 X-AntiSpamCloud-Domain: out.niagahoster.com X-AntiSpamCloud-Username: niaga Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=niaga@out.niagahoster.com X-AntiSpamCloud-Outgoing-Class: unsure X-AntiSpamCloud-Outgoing-Evidence: Combined (0.21) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5rPfEhfX/e+eau/qjvJ4jb4Xv9krsgRhBn0ayn6qsUc7lVo9zfgzQ4Wl m3+W3UHOX9rPco6cZhqWtwreetY+jpi4Dcwf+CZK8NXgy3In+fX7wY+mY/zG3nFBfzoL2F/hpQff Mg04rRVr2x8M/bymaZseMp6KSn2l4bHrRSeHUTefX2XX9bIsGDSYq5OAASmskWbEBG2scSEjB4Cc a3THUkuAeoVST18YIrGvoMJB7wvj1RtWIyKxUSoREjE/7VNQ8fiB2gGa4NbpRZ4pLIy2KmcXRuWz sGtazoE/vPfv1xaxiyi1TFE9uh6dOpTA08b6wDAs69FQbooXBmqDtpFld11brrwCZzWKieIk7R94 5NtYJWc6Hvk2XXh9/cAOBIKwOHz2xktCmqEq1+cTDToG9TPXXZAqrzYNzV3jEETifN/XfJomEqwE svuvXyGt8JcfF1EP5ysm/cbFtsaIamM3d2CAAuzz2dRpmmBV1pWxSApcaIfVaCHpEB6cFH6WJxE4 ZqmNQns4G4Lu1Z0qkp77KGV6tBzjT2SgBpw0u3YvKwGjMMBJUQdL3+ixbit0Y1f8ajl4lidU1b80 J2t/rYe9m+T+DoqBsC/uQMsclP8aiBJ2SSzm7P5LFQTh7xAIEq/JAOP/OUUiyoxKCnwuNYv1rN5F wMfy0YD5luPp6y0NK5zI21nziFiWzOLtUiLe5xIJsysavtI/BpoTTR0m9vx748g+ePukY31yweyg GiaBPV1Kfqb5R4VemuUI6bcEARsm0ASAg3ACsLVYcMwnzM6V4gQ3iiZtVhbV1vIcdJN0W2QuBIdw bMEc9U7OFQR0XkTUr1ss+n2ffnQxt6aJ7klZab+otuHJEaECIIhJNxMS+c0bF+8gN8ax9LqntRCm aHw627KnGFLUSfQxoCgjbv9bX5I= X-Report-Abuse-To: spam@quarantine1.antispamcloud.com X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Dec 2017 14:25:37 -0000 Hi, On Sun, 17 Dec 2017 11:13:19 +0000 RW via freebsd-questions wrote: > On Sun, 17 Dec 2017 11:24:28 +0800 > Erich Dollansky wrote: > > > I write this on a machine running FreeBSD 10 with a FireCuda 2TB > > drive, but the 2.5" version. The drive works but its behaviour was > > not what I expected. > > > > The SSD part is too small from my point of view. The drive is really > > fast when working on a project for which all fits into the 8GB SSD > > memory my drive has. It becomes a totally different story when > > compiling the kernel or installing large ports > > My understanding is they weren't intended to work like that. The last > I heard was that the SSD was divided into two, one part specifically > speeds up booting, and the other part caches sectors where the head > had to seek to access a small amount of data. how should a hard disk work? Data is written, data is read. How should this SSHD know where by boot-related data is stored? Why should this disk waste SSD memory for data I need with FreeBSD very rarely? It does not seem to me that it is like this. It is more likely that it uses the 8GB as a write cache. It is very fast before 8GB transfer volume is reached. If I copy a lot, the write speed goes down to 15MB/s and less. Erich