1633, can u flash when connected to slave

I read a few times, and once flashing my LG drive, that you should have it on master? is this true ?

or is just nonsense the manufacturers make up, or is it manufacturer specific.

Right now I am just to lazy to pull the master out of my benq

thanks for any insight to flashing while on slave, specifically the 1633

Yes, it could be flashed like slave.