Re: Accessing USB Mass Storage Device
From: Daniel Rudy (dr2867_at_pacbell.net)
Date: 10/24/05
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Date: Sun, 23 Oct 2005 19:34:45 -0700 To: ticso@cicely.de
At about the time of 10/20/2005 4:04 AM, Bernd Walter stated the following:
> On Tue, Oct 18, 2005 at 10:38:45PM -0600, M. Warner Losh wrote:
>
>>In message: <43553287.4030907@pacbell.net>
>> Daniel Rudy <dr2867@pacbell.net> writes:
>>:
>>: When the umass driver is compiled into the kernel, and one inserts a USB
>>: mass storage device, how does one access the device descriptors (serial
>>: number) while the device is listed as a da device? I would perfer to
>>: have the OS do all the work of accessing the hardware.
>>
>>The serial number can be obtained with devifo. However, since cam
>>doesn't hook into the device tree, mapping da number to umass number
>>can be tricky in the arbitrary case.
>>
>>devinfo -v | grep umass
>> umass0 pnpinfo vendor=0x054c product=0x014d devclass=0x00 devsubclass=0x00 release=0x0110 sernum="0052450548137984" intclass=0x08 intsubclass= at port=0 interface=0
>
>
> This is the USB serial number, there might even exist another one
> at CAM device layer.
> e.g.:
> [108]cicely13# camcontrol inquiry -n da -u 1
> pass1: <General Flash Disk Drive 2.05> Removable Direct Access SCSI-2 device
> pass1: Serial Number ST92163-2000
> pass1: 1.000MB/s transfers
> [110]cicely13# devinfo -v | grep umass0
> umass0 pnpinfo vendor=0x0483 product=0x1307 devclass=0x00 devsubclass=0x00 sernum="4710765066451" interface=0 intclass=0x08 intsubclass=0x06 at port=1
>
That was one of the first things that I tried. It didn't work. All I
got was a blank line.
-- Daniel Rudy _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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