From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.54) id 1EyVJC-0005G7-2X for garchives@archives.gentoo.org; Mon, 16 Jan 2006 14:26:10 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.5/8.13.5) with SMTP id k0GEO6MP022658; Mon, 16 Jan 2006 14:24:06 GMT Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.200]) by robin.gentoo.org (8.13.5/8.13.5) with ESMTP id k0GELxMK031928 for ; Mon, 16 Jan 2006 14:22:00 GMT Received: by wproxy.gmail.com with SMTP id i28so1254304wra for ; Mon, 16 Jan 2006 06:21:59 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=UdtgObxnTHhnqR5K0rrAgQEsDWuTLKEkH83qQQpfcp7VeM+DJ9VagJ5+dBvF4DgyE85JoVbP4AJnIDyqdX34Z9dXwxFu+s7xjwvX7oZazD8+avjN0XN4eqKwdhoJCRWLBSs55VFvnEr/ewS8NmtuL7DjvxsFQfDLxWPI/iJQmFA= Received: by 10.54.77.19 with SMTP id z19mr8137493wra; Mon, 16 Jan 2006 06:21:58 -0800 (PST) Received: by 10.54.66.12 with HTTP; Mon, 16 Jan 2006 06:21:58 -0800 (PST) Message-ID: <7573e9640601160621i367dfcc6l8296dc8c01cf1f4d@mail.gmail.com> Date: Mon, 16 Jan 2006 07:21:58 -0700 From: Richard Fish Sender: richard.j.fish@gmail.com To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] usb1 performance out of usb2 external HD In-Reply-To: <1137420487.14296.5.camel@orpheus> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline References: <1137393538.17254.12.camel@orpheus> <7573e9640601160540q35c78777ja920a85578209f53@mail.gmail.com> <1137420487.14296.5.camel@orpheus> Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by robin.gentoo.org id k0GELxMK031928 X-Archives-Salt: 35a4ab3b-e565-4bc7-9194-e9a7751bc0c3 X-Archives-Hash: f560960411accc1f13b017f5f0e3ca21 On 1/16/06, Iain Buchanan wrote: > On Mon, 2006-01-16 at 06:40 -0700, Richard Fish wrote: > > On 1/15/06, Iain Buchanan wrote: > > > Hi all, > > > $ sudo hdparm -tT /dev/sdd > > > > > > /dev/sdd: > > > Timing cached reads: 3640 MB in 2.00 seconds = 1820.28 MB/sec > > > Timing buffered disk reads: 30 MB in 3.13 seconds = 9.60 MB/sec > > > > > > 9.6 is pretty slow! I should be able to get at least double that... > > actually, I should be able to get 4x that... No, you won't. The max I've ever seen any USB drive run at is about 30MB/sec, even when the same drive installed internally will run at 65MB/sec. My best 2.5" case and drive will pump about 25MB/sec. > > Please post the dmesg output from plugging in the drive. > > Note, there are 4 LUNS on this device, the first 3 are card readers ,so > they show with no media (no drive or partitions), the fourth (sdd) is > the ide drive. Ok, I've never used one of these combination devices. I'm a little concerned, because the maximum throughput of most media readers is about 10MB/sec...so hoping this is not a limitation of the chipset. > relevant dmesg: Looks normal... > sdd: sdd1 sdd2 sdd3 sdd4 < sdd5 sdd6 sdd7 sdd8 sdd9 sdd10 sdd11 > Damn, and I thought I made a lot of volumes.... ;-> > $ zgrep USB /proc/config.gz | grep -v "^#" > CONFIG_USB_IRDA=m > CONFIG_BT_HCIUSB=m > CONFIG_BT_HCIUSB_SCO=y > CONFIG_BT_HCIBFUSB=m > CONFIG_USB_ARCH_HAS_HCD=y > CONFIG_USB_ARCH_HAS_OHCI=y > CONFIG_USB=m > CONFIG_USB_DEVICEFS=y > CONFIG_USB_EHCI_HCD=m > CONFIG_USB_UHCI_HCD=m > CONFIG_USB_PRINTER=m > CONFIG_USB_STORAGE=m I think you need to turn on some of the options under USB Mass Storage support. Particularly CONFIG_USB_STORAGE_FREECOM=y but I don't think there is any harm in turning all of them on...it is very likely that one of these will give you the best performance. -Richard -- gentoo-user@gentoo.org mailing list