[ubuntu] jbd2 / samba prevents drives spinning down

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http://ubuntuforums.org – Hi, I just finished setting up a fresh 12.04 server installation to use as a file server. I installed samba but would like to us hdparm to spin down my raid array (ext4) when not in use. However, when I ran iotop, i found that jbd2 was writing to the array every 5 seconds or so preventing it from spinning down the disks. Is there a way to prevent it from writing to the disk so often? I ran across a thread that suggested adding "noatime" to the fstab where the array is mounted, but after i did that iotop still shows it writing to the disk every few seconds. I also saw that samba upd (Hardware)