Disk activity

Hi, From time to time my harddisk seems to sit with a cyclic seek process. In GKrellM this shows as a constant low level of disk activity. QU: how do I find out what is causing this. I guess it is a process of some kind, but I'm not sure how to find it. Seems to occur if one of the family has been on their PC (mine is the server) The PC gets shut down each night, so this little annoyance goes away. Any pointers will be appreciated. -- Regards, Roland Hill Registered Linux User #330226 http://pl.net/~rnrhill/rhweb.htm @ http://counter.li.org