From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1QrZ4E-0007D3-Fb for garchives@archives.gentoo.org; Thu, 11 Aug 2011 17:29:14 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0741D21C0DD; Thu, 11 Aug 2011 17:28:59 +0000 (UTC) Received: from mail0101.smtp25.com (mail0101.smtp25.com [67.228.8.101]) by pigeon.gentoo.org (Postfix) with ESMTP id B260F21C0B1 for ; Thu, 11 Aug 2011 17:27:55 +0000 (UTC) Received: from ccs.covici.com (localhost [127.0.0.1]) by ccs.covici.com (8.14.5/8.14.4) with ESMTP id p7BHRo6d032549 for ; Thu, 11 Aug 2011 13:27:53 -0400 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] {OT} USB 3.0 hard drive speed test In-reply-to: References: Comments: In-reply-to Grant message dated "Thu, 11 Aug 2011 10:12:54 -0700." X-Mailer: MH-E 8.2; nmh 1.3; GNU Emacs 23.3.1 Date: Thu, 11 Aug 2011 13:27:50 -0400 Message-ID: <32548.1313083670@ccs.covici.com> From: covici@ccs.covici.com X-SpamH-Filter: y-out0.smtp25.com-p7BHRsZD010177 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Archives-Salt: X-Archives-Hash: 59acbb915cea945253eb8fcb63fe7a22 Grant wrote: > I'm testing this USB 3.0 bus-powered hard drive: > > http://www.amazon.com/gp/product/B0041OSQ9S > > and I get: > > # hdparm -tT /dev/sdb > /dev/sdb: > Timing cached reads: 8006 MB in 2.00 seconds = 4004.33 MB/sec > Timing buffered disk reads: 252 MB in 3.01 seconds = 83.63 MB/sec > > # hdparm -tT /dev/sdb > /dev/sdb: > Timing cached reads: 8230 MB in 2.00 seconds = 4116.54 MB/sec > Timing buffered disk reads: 252 MB in 3.02 seconds = 83.55 MB/sec > > # hdparm -tT /dev/sdb > /dev/sdb: > Timing cached reads: 8446 MB in 2.00 seconds = 4224.36 MB/sec > Timing buffered disk reads: 230 MB in 3.02 seconds = 76.28 MB/sec > > Wikipedia says USB 3.0 has transmission speeds of up to 5 Gbit/s. > Doesn't MB/sec denote mega*bytes* per second? What usb3 is supported by Linux? Is it a pci card? -- Your life is like a penny. You're going to lose it. The question is: How do you spend it? John Covici covici@ccs.covici.com