Accessing USB Mass Storage Device

[Daniel Rudy]

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 at pacbell.net>
>>            Daniel Rudy <dr2867 at 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