If you aren't running your machine in laptop-mode (which is an explicit setting) it is expected that the hard disk will be accessed every few seconds or so as data will be being written to the journal frequently to the partition journal keep things consistent in the case of a crash. Additionally, if you have atime reporting on (which is the default) then accessing a file (even to do a read) will cause a write as the access time of the file will be updated.
pdflush is a kernel thread and is almost certainly simply a messenger in all of this. To the best of my knowledge it just periodically flushes data back to disks. -- hard disk being accessed every 4 sec. https://bugs.launchpad.net/bugs/17878 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs