From owner-freebsd-scsi@FreeBSD.ORG Mon Sep 1 15:31:31 2014 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 7C3B1329 for ; Mon, 1 Sep 2014 15:31:31 +0000 (UTC) Received: from cu01176b.smtpx.saremail.com (cu01176b.smtpx.saremail.com [195.16.151.151]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 3A4371AB1 for ; Mon, 1 Sep 2014 15:31:30 +0000 (UTC) Received: from [172.16.2.2] (izaro.sarenet.es [192.148.167.11]) by proxypop04.sare.net (Postfix) with ESMTPSA id 6E4909DCEBE for ; Mon, 1 Sep 2014 17:21:20 +0200 (CEST) From: Borja Marcos Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: Samsung 840 Pro SSD and quirks Date: Mon, 1 Sep 2014 17:21:18 +0200 Message-Id: To: FreeBSD-scsi Mime-Version: 1.0 (Apple Message framework v1283) X-Mailer: Apple Mail (2.1283) X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Sep 2014 15:31:31 -0000 Hi, I have just noticed that the Samsung 840 SSDs now have the 4 KB block = quirk added.=20 Is this really the case? I've been playing with them some time ago and I = didn't notice performance differences between using ZFS on them either "directly" (advertised 512 byte blocks) or forcing 4 KB blocks using = gnop. Just surprised, I didn't find references to the true block size. Borja.