On 4/11/18 4:44 pm, Samuel Sieb wrote:
On 11/3/18 10:19 PM, Eyal Lebedinsky wrote:
What is this io, and can it be stopped? I want to allow the disks to enter low power mode (not spin down) when idle.
I'm assuming since it's a new RAID that you haven't created files on it yet, or at least not many. Try running "lsof +D /mnt/point" to see if there is any process looking at it. Then try running "inotifywait -rm /mnt/point" and let it run for a little while to see if you can catch some process accessing the fs. You will need to install "inotify-tools" to get that program.
Sure, should have said a bit more: The array was resync'ed, then (much) data was copied in. This was a few days ago.
$ sudo inotifywait -rm /new-raid Setting up watches. Beware: since -r was given, this may take a while! Watches established. -> nothing listed for a few minutes
'lsofs' finds nothing relevant.
'lsofs +D' is likely to take too long: $ sudo find /new-raid/ -type d|wc -l 101078 $ sudo find /new-raid/ -type f|wc -l 1445375 It is running now...