This is not something you want to do at home. We got 12 MD3260 servers for our PB storage system. They weight, empty of disks, 40 KG, 100 KG full. Each unit is as big as an office table. Guess who was appointed to configure them? Yes, you’re right!
Let’s begin. We need a serial cable. That is this one like a VGA cable, but in feminine (holes) in one side, and a kind of mini USB on the other. Then a computer able to read serial cable, or an adapter for it. Preferable a laptop, but since it was not available at the moment, I was asked to take our DELL T620, that was already in a wagon. Yes, it has 12 SATA disks in it, but the boss rules. OS of my choice was CentOS7.
There are instructions about how to configure the management port on the network. For example here. But the reality is always more complicated. We connected both machines (MD3260 and T620) and tried to do it with minicon, but minicon, despite of being able to open a console, was not able to go beyond that. So we went on with PuTTy. We configured a profile like above, then you just need to press “Open”. A terminal-like window will appear. Press them CTRL+Break, and quickly after it Shift+S. Type quickly the password (supportDell) and you reach them the desired menu! The whole think looks similar to this:
Baud rate set to 115200 Press within 5 seconds: <S> for Service Interface, <BREAK> for baud rate Current date: XX/XX/XX time : HH:MM:SS Enter Password to access Service Interface (60 sec timeout): Service Interface Main Menu ==================================== 1) Display IP Configuration 2) Change IP Configuration 3) Reset Storage Array Administrator Password Q) Quit Menu Enter Selection:
Sorry, I made pictures but they’re horrible 😀 . Note that if you are not quick enough, just press again CTRL+Break, and quickly after it Shift+S, and you’re back into the menu above. Note also that if you connect to a machine that is being booted, you will see a lot of messages, similar to the ones you get on /var/log/messages when a system is booting. Don’t panic and ignore them!
Actually, the whole thing lasted less than I expected, since it was possible to disconnect the serial from one machine, and connect it into another, then press the magical keys and voila! the menu appeared. That is, you don’t need to close the PuTTy window to access to a new machine. Have a nice weekend…