How USB's are enumerated on the XO

Eben Eliason eben.eliason at gmail.com
Mon Jun 23 14:41:16 EDT 2008


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.
(http://dev.laptop.org/ticket/1848)

- Eben


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