I recently reinstalled from scratch a CentOS 6.2 x64 installation to replace my existing 5.7 x86 build. I have two network shares presented from my Synology DiskStation that I have mounted as follows:
mount -t cifs //nas/share /home/data/share -o credentials=/root/diskstation, uid=
The NAS is set to spin down the disks and hibernate after 30 minutes of disk inactivity and this worked perfectly under 5.7 with the shares mounted. The drive would spring into life as soon as anything accessed the mount points and then spin down half an hour later. However, under 6.2 the drives remain spun up and active 24 hours a day. I can see a small blip of disk activity once every 20 seconds and if I power the CentOS machine off, the disks then hibernate 30 minutes later as expected. I've disabled the hourly anacron job but this hasn't made any difference.
Does anybody know if CentOS now has some kind of index or process that could explain the probing my network shares every 20 seconds? I'd really like to stop it if I can.
Thanks for your help.