Re: [Patch-gnuradio] Re: [Discuss-gnuradio] USRP2 SD Card rewrite

[Eric Blossom]

On Sun, Dec 28, 2008 at 04:05:13AM -0800, Dan Halperin wrote:
> On Nov 2, 2008, at 4:01 PM, Robert McGwier wrote:
>> The correct instructions seem to be
>>
>> cd usrp2/firmware
>> Run "sudo ./u2_flash_tool --dev=/dev/XXXX -t s/w ./apps/txrx.bin -w"
>>
>> with the rest which I emphasize again.  If you get the wrong XXXX for
>> the device,  you can wipe out your hard drive.  Most people will have
>> their hard drive as /dev/sda and on my computer it seems the device
>> is, like Matt's computer, to be /dev/sdb.
>
> An obvious thing to do here is to read the size of the device and abort 
> if it's > 2 or 4 GB. It's simple to get the device size (this works on 
> /dev/sda1 in ubuntu 8.10 using python 2.6 at least):
>
>     dev = open(devname, "r")
>     dev.seek(0, os.SEEK_END)
>     size_in_gigs = dev.tell() / (2.0**30)
>
> Thanks,
> Dan

Good idea Dan!

Thanks,
Eric