From owner-freebsd-usb@FreeBSD.ORG Sat Aug 21 16:53:59 2010 Return-Path: Delivered-To: freebsd-usb@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 732FF1065696 for ; Sat, 21 Aug 2010 16:53:59 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from tower.berklix.org (tower.berklix.org [83.236.223.114]) by mx1.freebsd.org (Postfix) with ESMTP id 9DA8C8FC0C for ; Sat, 21 Aug 2010 16:53:58 +0000 (UTC) Received: from park.js.berklix.net (p549A76F5.dip.t-dialin.net [84.154.118.245]) (authenticated bits=0) by tower.berklix.org (8.14.2/8.14.2) with ESMTP id o7LGa5Tk048379; Sat, 21 Aug 2010 16:36:06 GMT (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (fire.js.berklix.net [192.168.91.41]) by park.js.berklix.net (8.13.8/8.13.8) with ESMTP id o7LGZmdq006430; Sat, 21 Aug 2010 18:35:49 +0200 (CEST) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (localhost [127.0.0.1]) by fire.js.berklix.net (8.14.3/8.14.3) with ESMTP id o7LGZan3008193; Sat, 21 Aug 2010 18:35:38 +0200 (CEST) (envelope-from jhs@fire.js.berklix.net) Message-Id: <201008211635.o7LGZan3008193@fire.js.berklix.net> To: Hans Petter Selasky From: "Julian H. Stacey" Organization: http://www.berklix.com BSD Unix Linux Consultancy, Munich Germany User-agent: EXMH on FreeBSD http://www.berklix.com/free/ X-URL: http://www.berklix.com In-reply-to: Your message "Sat, 21 Aug 2010 17:56:26 +0200." <201008211756.26486.hselasky@c2i.net> Date: Sat, 21 Aug 2010 18:35:36 +0200 Sender: jhs@berklix.com Cc: freebsd-usb@freebsd.org Subject: Re: USB HDD needs replugging? X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 21 Aug 2010 16:53:59 -0000 Hans Petter Selasky wrote: > On Saturday 21 August 2010 17:37:18 indulekha wrote: > > On Sat, 2010-08-21 at 17:18 +0200, Hans Petter Selasky wrote: > > > > Yes, there is a dmesg error: > > > > > > > > ugen4.5: <(null)> at usbus4 (disconnected) > > > > uhub_reattach_port:435: could not allocate new device! > > > > > > > > But then just a few lines later, dmesg says: > > > > > > > > ugen4.5: at usbus4 > > > > umass1: on usbus4 > > > > umass1: SCSI over Bulk-Only; quirks = 0x0000 > > > > umass1:3:1:-1: Attached to scbus3 > > > > da1 at umass-sim1 bus 1 target 0 lun 0 > > > > da1: Fixed Direct Access SCSI-4 device > > > > da1: 40.000MB/s transfers > > > > da1: 305245MB (625142448 512 byte sectors: 255H 63S/T 38913C) > > > > > > > > I'm thinking there's some sort of power management scheme in the > > > > Seagate that umass has trouble accommodating. > > > > > > Does your USB device have a separate power supply? > > > > > > --HPS Joining late, sorry > > No, it's one of those pocket-sized HDDs. > > This one, actually: > > http://www.amazon.com/gp/product/B001SJZV10/ref=oss_product No current rating at http://www.seagate.com/ww/v/index.jsp?name=ST903204EXM101-RK-apac-expansion-portable-usb-320gb-hd&vgnextoid=16816583b2561210VgnVCM1000001a48090aRCRD&locale=en-US#TabContentSpecifications > Hi, > > Try to use an external self-powered USB HUB and see if the problem is the > same. Yes, PS Ive had so much grief with USB over the years, I cut out some USB sockets off a dead mboard, so I can intercept & meausure voltage & current on USB devices. USB 1 & 2 is spec'd at <= 0.5 Amp, (more on USB3 later) As well as the hub, A power doubler USB Y leads into 2 sockets of the hub may help, also plug both of those in before the disc in the other end. (else voltage droop while disc spins may confuse disc internal logic). PPS HPS Re that suspicion above, I also have a device that used to confuse usbd & prob. still confuses devd, (I guess it was turning itself off after listening to cable, anyway it's free if you or another USB developer wants to play with it, contact me. http://berklix.com/~jhs/txt/clipman/ Cheers, Julian -- Julian Stacey: BSD Unix Linux C Sys Eng Consultants Munich http://berklix.com Mail plain text, Not HTML, quoted-printable & base 64 dumped with spam. Avoid top posting, It cripples itemised cumulative responses.