From owner-freebsd-questions@FreeBSD.ORG Wed Apr 15 12:49:19 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B228F10656D2 for ; Wed, 15 Apr 2009 12:49:19 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 2B3E98FC33 for ; Wed, 15 Apr 2009 12:49:19 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1Lu4YD-00066G-9q for freebsd-questions@freebsd.org; Wed, 15 Apr 2009 12:49:13 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 15 Apr 2009 12:49:13 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 15 Apr 2009 12:49:13 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Ivan Voras Date: Wed, 15 Apr 2009 14:49:05 +0200 Lines: 52 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigB1EC0298C77D7E862A2914F7" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.21 (X11/20090318) In-Reply-To: X-Enigmail-Version: 0.95.0 Sender: news Subject: Re: hard drive performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Apr 2009 12:49:22 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigB1EC0298C77D7E862A2914F7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Alexander Best wrote: > hi there, >=20 > i have 2 hard drives running. the first one is SATA300 and the other on= e > UDMA100. here are the dmesg entries: >=20 > ad0: 238474MB at ata0-master SATA300 > ad1: 157066MB at ata4-master UDMA100= >=20 > i've tried to test the drives' performances using the following command= s: >=20 > dd if=3D/dev/ad0 of=3D/dev/null bs=3D1m count=3D300 > and > dd if=3D/dev/ad1 of=3D/dev/null bs=3D1m count=3D300 >=20 > the results are: > ad0 =3D 314572800 bytes transferred in 4.325645 secs (72722751 bytes/se= c) > ad1 =3D 314572800 bytes transferred in 5.166126 secs (60891430 bytes/se= c) >=20 > the results for ad0 are a bit disappointing though. is this normal or i= s bs=3D1m > wrong? 70+ MB/s is a perfectly fine speed for a modern drive. The "300" in SATA300 doesn't mean what you probably think it means. --------------enigB1EC0298C77D7E862A2914F7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFJ5dfBldnAQVacBcgRAsMzAKC0Lm8Y69l1QAMIsHAfKEZ6wGI+qwCg626k RpB5KY98EXTvvIaBrGCrfO4= =zKZF -----END PGP SIGNATURE----- --------------enigB1EC0298C77D7E862A2914F7--