Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751091AbVIDVFH (ORCPT ); Sun, 4 Sep 2005 17:05:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751118AbVIDVFH (ORCPT ); Sun, 4 Sep 2005 17:05:07 -0400 Received: from multivac.one-eyed-alien.net ([64.169.228.101]:28043 "EHLO multivac.one-eyed-alien.net") by vger.kernel.org with ESMTP id S1751091AbVIDVFG (ORCPT ); Sun, 4 Sep 2005 17:05:06 -0400 Date: Sun, 4 Sep 2005 14:04:46 -0700 From: Matthew Dharm To: Alan Stern Cc: Jan De Luyck , USB Storage list , USB development list , linux-kernel@vger.kernel.org Subject: Re: [linux-usb-devel] Genesys USB 2.0 enclosures Message-ID: <20050904210446.GA16290@one-eyed-alien.net> Mail-Followup-To: Alan Stern , Jan De Luyck , USB Storage list , USB development list , linux-kernel@vger.kernel.org References: <200509031812.54753.lkml@kcore.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3V7upXqbjpZ4EhLz" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Organization: One Eyed Alien Networks X-Copyright: (C) 2005 Matthew Dharm, all rights reserved. X-Message-Flag: Get a real e-mail client. http://www.mutt.org/ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2100 Lines: 66 --3V7upXqbjpZ4EhLz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Sep 03, 2005 at 09:53:19PM -0400, Alan Stern wrote: > On Sat, 3 Sep 2005, Jan De Luyck wrote: >=20 > > I've posted in the past about problems with these enclosures - increasi= ng the=20 > > delay seems to fix it, albeit temporarily. The further you go in using = the=20 > > disk in such an enclosure, the higher the udelay() had to be - atleast = that's=20 > > what I'm seeing here (I've got two of these now :/ ) > >=20 > > One permanent fix is adding a powered USB-hub in between the drive encl= osures=20 > > and the computer. Since I've done that, I've no longer seen any of the= =20 > > problems (i've attached the 'fault' log). Weird but true, since the dri= ves=20 > > come with their own powersupply. > >=20 > > Hope this helps anyone in the future running into the same problem. >=20 > This one certainly goes into the Bizarro file. >=20 > Just out of curiosity -- when you use the powered hub, does the drive wor= k=20 > even if you remove that delay completely? Aren't USB 2.0 hubs more "intelligent" as part of the requirement to support 1.1 and 2.0 devices? I wonder if it's really a 2.0 drive, and if the timing is different enough with the hub to make a difference. Matt --=20 Matthew Dharm Home: mdharm-usb@one-eyed-alien.= net=20 Maintainer, Linux USB Mass Storage Driver THEY CASTRATED MY QUAKE BITS! I WANT THEM BACK!!!! -- Greg User Friendly, 3/27/1998 --3V7upXqbjpZ4EhLz Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDG2FuHL9iwnUZqnkRArAhAJ98RKmiNJBrlXOP6nb4Dz2I0//TjwCfUbKc 1nQhjJQCeosn1BqejJR9KW4= =BSrx -----END PGP SIGNATURE----- --3V7upXqbjpZ4EhLz-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/