No no, that's the World _Series_ you're talking about
Maybe you could give atop http://www.atoptool.nl/ a try?
It shows (per process) disk-IO and nicely integrates cpu/disk/network/io statistics, it can also store statistics for later playback.
When trying to trace which file is getting a lot of IO you might want to take al look at the filedescriptors in
Link to Original Source
That file, it turned out, included the administrative login and password in cleartext. Chen investigated and found the same login and password could access the admin panels for every router in the SMC8014 series on Time Warner's network
In ADSL modems there may be a reason for storing the users password in the modem: ppp-authentication, for cable modems I can't think of such a reason. Then again, if you control a router/modem you can sniff out user's passwords if the use plain-text authentication e.g. for POP3.