How USB's are enumerated on the XO
jbsp72 at gmail.com
Tue Jun 24 07:48:52 EDT 2008
The USB device that I am connecting is not a storage drive. so there is no
way I can copy a file containing a unique UUID on the device. I just need
one unique parameter for the device when it is connected to the system. On
the XO according to the /proc/bus/usb/devices file It is the port no. But If
have a normal fedora machine it is the bus no.
I just wanted to know If this is because of the way in which the USB
hardware is organised on the olpc/
On Tue, Jun 24, 2008 at 12:11 AM, Eben Eliason <eben.eliason at gmail.com>
> On Mon, Jun 23, 2008 at 2:36 PM, Carl-Daniel Hailfinger
> <c-d.hailfinger.devel.2006 at gmx.net> wrote:
> > On 23.06.2008 20:29, Jim Gettys wrote:
> >> While in theory, USB devices can/should send serial numbers, that part
> >> of the spec is honored mostly by it's absence (due to cost).
> >> As John said, unfortunately, with USB you have to go down to the device
> >> and see if they have something usable to distinguish devices.
> > The easiest way to achieve this on USB flash disks is to store a file
> > with a UUID on each disk upon first insertion.
> Note also that this suggestion is in alignment with an old idea to
> fingerprint drives with identity/colors, to make them function in the
> same identity system as laptops, activities, and objects.
> - Eben
> Devel mailing list
> Devel at lists.laptop.org
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