I have a pair of R310's both are BIOS v1.5 and v1.6. The support site has downloads for v.1.12 - v.1.14 which is the latest published. 

I have tried to flash the oldest available BIOS but it fails because it things it's not an R310 and it does not allow me to proceed. 

Is there a place where I can find older BIOS versions to do an intermediate update, or is there a command line option that will force the BIOS update?

Thanks and regards,