USB auxiliary port on 5406R not working?

[Merideth]

I just unboxed a brand new 5406R zl2 switch.  I wanted to use the USB auxiliary port to upgrade the firmware to version KB.15.16.0005, but I'm having an issue getting it to work.  When I first plugged my flash drive in, the USB light was green for a second, but then went dark.  Looking at the logs I found an event that read "unable to mount /ufa0".  Since that first attempt, I cannot even get the USB light to show green until a device is being unplugged.  There is no mention of it in the logs anymore.  I have tried a couple of different storage devices.  I was then able to upgrade the firmware via TFTP, but I would like to be able to use the USB port at some point.  Am I doing anything wrong, or is this something I have to report to HP support?

Thanks!

[Michael Patmon]

Usually that means it doesn't recognize the file system.  If the drive is formatted as FAT it should work.  

Not the most intuitive error message...