My company had a NS-120 in our lab that they wanted disposed of.  It had a dead data mover and 2 dead drives and was no longer under warranty.  I volunteered to take it off their hands and play with it at home in my lab.

Due to the failed data mover, server_3, I used KB articles to remove server_3 from the NASDB and have cabled the NS-120 as though it were a single data mover install.  Everything works great but I cannot ping server_2b (nothing on the 128.221.253.0 is pingable) and when attempting to upgrade DART, /nas/sbin/setup_enclosure -checkSystem fails because Mgmt-Switch-B is not accessible and gives the following error:

Error: Unable to read the F/W version from Mgmtswitch (IP:128.221.253.50)

Is Management Switch B a part of the failed data mover?  If so, can it be bypassed somehow to allow DART upgrades?  It seems since eth2 on the Control Station is what has an IP on the 128.221.253.0 network that it's no wonder it can't ping anything since the NS-120 single data mover install guide says to plug it directly into SPB.

Any advice would be welcome.  I'd like to get this system upgraded.

Thanks!