Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It had a fan?

Looking at other reviews, I now have a hint as to why my SD2008 stopped working so well. My network performance had really dropped to low levels, and I finally tracked it down to this switch. It was working fine when I first got it, but recently I was getting less than 20kbps (slower than a dial-up modem) to some web sites, and others were so unresponsive as to be unbearable.I replaced it with a 3COM switch, and things are much, much better now.On the plus side, it wasn't noisy at all. But I'm guessing--based on other reviews--that it's because the fan failed and it had started to overheat. It was probably only a matter of time before it failed completely.