Copying memstick image to a USB (flash/thumb) drive

[Quartz]

>      Why exactly is the "bs=10240" is there?  Wouldn't the default of 512
>      do just as well?

Modern systems can read and write far more than 512 bytes per operation. 
Sticking with 512 would work perfectly fine, but you'd be imposing an 
unnecessary bottleneck and the copy would be a lot slower overall. 
Whether 10K is optimal or not depends on the exact hardware you're 
messing with (it looks pretty low to me, I'd suggest more like 1M).

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