I've had a look at the source for xosview and I don't see how it can possibly be giving sensible values for disk activity. It tries to get the disk i/o data by looking in /proc/stat for a line starting with 'page', but this seems to have vanished in the 2.6 kernel. Presumably because disk statistics are now in /proc/diskstats. (And incidentally, // Find the line with 'page' stats >> buf; while (strncmp(buf, "page", 9)) Why 9?) One for bugzilla, perhaps? Ron