USB Pen drive
Steve O'Hara-Smith
steve at sohara.org
Wed Jun 28 03:48:56 PDT 2006
On Wed, 28 Jun 2006 10:51:36 +0100
Rob Andrews <rob at xxxxxxxxxxxxx> wrote:
> On 28-Jun-2006 09:51.34 (BST), Steve O'Hara-Smith wrote:
> > > usbd shouldn't be needed for a USB mass storage device (e.g. like a
> > > pen drive).
> > I thought it was needed to manage the dynamic connect/disconnect
> > recognition (the man page indicates that it is so I've always used it). Does
> > that all happen properly without usbd ?
>
> All of the connect/disconnect events are handled at the HCD (host controller
> driver) driver level. usbd can act upon connect events to, say, start moused
> when a USB mouse is connected (this is defined in the configuration by
> default).
So this section of man usbd (the first paragraph) needs a rewrite ?
The usbd utility handles USB device attachment and detachment. It does
two things. Through opening the /dev/usb0, /dev/usb1, etc. devices, it
enables the kernel to handle change requests from attached hubs. This
functionality will be removed when the kernel has kernel threads. The
(multiple) -f device command line options specify which controllers it
should handle. Normally this option is not needed.
Or does that refer to something other than attaching devices to
their nodes ?
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