Shortly after logging into Ubuntu (10.04), the System Monitor started to show high I/O wait activity, levelling at about 50% of the graph (presumably because I use a dual-core laptop). At the same time, the hard disk read/write indicator light is lit. The program iotop revealed the Ubuntu One Sync Daemon to be the one responsible. Presumably the Ubuntu One is trying to hash the files (since it occurs even if I'm disconnected).
Now, the problem with this is that this intense hard disk hogging can take up to two or three minutes, which makes Ubuntu insufferably slow. Opening Firefox is okay, but the browser is constantly greyed out and lags horribly. It reminds me of those Windows days when I try to use my computer while a virus scanner is grinding my hard disk.
Given that I often shut down my laptop when I don't use it (about 3 to 4 times a day), this makes Ubuntu lose much of its lustre. So my question: is this normal behaviour, i.e. are other people experiencing such a situation as well?