[Le Flaneur]

I recently purchased a SanDisk Ultra II SD card. Yesterday, I was copying a 70MB mp3 file to the card (using a Lexar reader via USB 2) when the copying just stopped at around 50 MB. I couldn't cancel the copy, and restarting my machine wouldn't work. I eventually had to reboot.

I've run a scan on the device using Drive Genius 1.2, which found nothing. I copied the file again this morning without problem.

My feeling is that the OS is less stable when USB devices are connected. I've also seen faulty USB devices cause kernel panics.

Do others concur that USB is a weak spot in the system?

[mduell]

Drivers are one of the most common causes of OS problems, but it should be unrelated to the way the device connects (USB, FireWire, PCI, etc).
Apple has historically used a relatively slow implmentation of USB, but I can't see them writing/using an unstable host controller driver.