Brocade VDX6740 Firmware Upgrade From 5.X To 6.X

I got three VDXs in a lab to learn and play with recently.  The first thing I wanted to do was to upgrade the firmware on them all to a good version to be on.  Based on another SE recommendation, I went to version nos6.0.2a2.
I setup my FTP server on my laptop and ran the following commands on the first VDX:

sw0# config t
sw0(config)# int man 1/0
sw0(config-Management-1/0)# ip add 10.10.10.12/24
sw0(config-Management-1/0)# exit
sw0(config)# exit
sw0# firmware download ftp host 10.10.10.1 coldboot directory /nos6.0.2a2 user anonymous
Password: ****
Performing system sanity check...



This command will cause a cold/disruptive reboot and will require that existing telnet, secure telnet or SSH sessions be restarted.

Do you want to continue? [y/n]:y
Checking conditions for downloading to 6.0.2
...
...

Ive taken out the rest of what happens, but after the reboot, it comes back up with the new code, and then deletes the old code off the box.  There are options, in that you dont have the delete the old code if you dont want to.  You can also revert back to the old code if you like.
So that is it.  You put an IP address on the management interface, then download the firmware on the box.  It does the rest.