Archive for the ‘Uncategorized’ Category

Server upgrade

I told about the new hardware I bought for my server in this article.

Specifically the hardware is:

  1. An HP 491838-001 network card, that is a NC375i PCIe quad gigabit port
  2. A QLogic QLE2560 SFP FCA with it’s fiber module
  3. A Brocade 4Gb SFP module

Let’s start from the first item, even though it is an HP spare part, it works fine even in my DELL. It is a PCIe x8 card and, as in my PowerEdge I only have x8 slots, I put it in one of them, using the riser card. Both the BIOS and ESXi recognized it and it started working.

The second item it’s a QLogic FCA card. It’s basically a network card but with a firmware oriented to SAN connection. At first I bought it to connect the server to the data center switch using a fiber. I wasn’t expecting a big throughput, as my switch has only 1Gb connectivity on SFP: it was just to try to use a different kind of connection. When I realized that the card was indeed unusable for my needs, I decided to let it in the server just to see how it appeared in ESXi: it is recognized as QLogic FCA as expected, but I’m going to remove it and resell, as I don’t need it anymore.

The last item is a Brocade SFP 4Gb adapter. Well I bought it to be placed into the SFP slot in the switch, and I assume it’s working. Unfortunately it can’t communicate with the QLogic’s one, as they are meant to talk different languages. But I have another SFP and I’m quite sure than soon or later I will find something to connect them to.

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Coming soon…

It’s time to write down something new…

I’m planning to create a map of my home network using Dia, and post it on Rate My Network Diagram web site. I just only have to find the time to do it…

Running commands on multiple Linux machines

The gsh software was born to run a command in parallel on multiple Linux machines.

Sincerely I did not test it, but posted this link on my blog as a future reference, it may become usefull one day..

Hello world!

Ok, today is April 15th 2010. And I decided to open a blog.

I think there are almost two big reasons to open a blog:

  1. You have something important you want the others to know
  2. You know something and you want to know others’ opinion about it

But I decided to open this blog for another reason. Recently my memory seems to lack some neurons, so I usually forgot things I should must remember. So I first decided to write things on paper, but I discovered I could forgot where I put those piece of paper. So I thought “maybe my notes won’t be lost on Internet”, and I opened this blog.

So here you will find my notes on electronics, computer and whatever else I have to wrote down before i forgot them. Obviously, you won’t find my credit card number: I forgot where i put it…