Date: Mon, 10 Apr 2006 08:14:04 -0500 (CDT) From: Sergey Babkin <babkin@verizon.net> To: "M. Warner Losh" <imp@bsdimp.com>, mwm-keyword-freebsdhackers.102a7e@mired.org Cc: ceri@submonkey.net, babkin@users.sourceforge.net, hackers@freebsd.org, scottl@samsco.org Subject: Re: Re: What's in a (device) name? Message-ID: <7062548.1416391144674845516.JavaMail.root@vms069.mailsrvcs.net>
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>From: "M. Warner Losh" <imp@bsdimp.com> >usb assigns addresses dynamically. Everyone else does it basically >statically. PCI slot/device numbers are static, but extreme >configurations can change the bus number. Some USB devices (though not all of them) provide a unique device ID. If this ID is available, binding to a particular device is straightforward. The problems start when the device get replaced. For example, an USB printer dies and you replace it with another one. Form a tech support standpoint it's convenient if the new printer gets silently recognized as a replacement of the old one. -SB
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