Date: Sat, 21 Aug 2010 13:20:57 -0400 From: indulekha <thebeelzebubtrigger@gmail.com> To: "Julian H. Stacey" <jhs@berklix.com> Cc: freebsd-usb@freebsd.org Subject: Re: USB HDD needs replugging? Message-ID: <1282411257.2584.36.camel@satcidananda> In-Reply-To: <201008211635.o7LGZan3008193@fire.js.berklix.net> References: <201008211635.o7LGZan3008193@fire.js.berklix.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, 2010-08-21 at 18:35 +0200, Julian H. Stacey wrote: > 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: > > > > >=20 > > > > > ugen4.5: <(null)> at usbus4 (disconnected) > > > > > uhub_reattach_port:435: could not allocate new device! > > > > >=20 > > > > > But then just a few lines later, dmesg says: > > > > >=20 > > > > > ugen4.5: <Seagate> at usbus4 > > > > > umass1: <Seagate Portable, class 0/0, rev 2.00/1.30, addr 5> on u= sbus4 > > > > > umass1: SCSI over Bulk-Only; quirks =3D 0x0000 > > > > > umass1:3:1:-1: Attached to scbus3 > > > > > da1 at umass-sim1 bus 1 target 0 lun 0 > > > > > da1: <Seagate Portable 0130> Fixed Direct Access SCSI-4 device > > > > > da1: 40.000MB/s transfers > > > > > da1: 305245MB (625142448 512 byte sectors: 255H 63S/T 38913C) > > > > >=20 > > > > > I'm thinking there's some sort of power management scheme in the > > > > > Seagate that umass has trouble accommodating. > > > >=20 > > > > Does your USB device have a separate power supply? > > > >=20 > > > > --HPS >=20 >=20 > Joining late, sorry >=20 > > > No, it's one of those pocket-sized HDDs. > > > This one, actually: > > > http://www.amazon.com/gp/product/B001SJZV10/ref=3Doss_product >=20 > No current rating at=20 > http://www.seagate.com/ww/v/index.jsp?name=3DST903204EXM101-RK-apac-expa= nsion-portable-usb-320gb-hd&vgnextoid=3D16816583b2561210VgnVCM1000001a48090= aRCRD&locale=3Den-US#TabContentSpecifications >=20 > > Hi, > >=20 > > Try to use an external self-powered USB HUB and see if the problem is t= he=20 > > same. >=20 > 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. >=20 > USB 1 & 2 is spec'd at <=3D 0.5 Amp, (more on USB3 later) >=20 > 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). >=20 > 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/ >=20 > Cheers, > Julian Actually, I haven't had any trouble with USB for a long time now but=20 maybe that's just luck. :) Had to jump through some minor hoops to get=20 my Blackberry to mount, otherwise USB has pretty much "just worked" for me the last two years or so.=20 Well, there was one other purchase of a portable USB HDD before this one; it wasn't recognized at all so I just returned it. I'd have returned this one too had I known...=20 --=20 caveat utilitor, Indi =20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1282411257.2584.36.camel>