strange constant writes on mounted HDD

[sza]

hi,

i just begin testing proxmox for an experiment. my setup is the following:
1x nvme for OS
1x nvme for VMs (LVM)
1x high capacity seagage HDD (the role of this single HDD will be the main backup drive of the VMs)
1x external usb hdd for images and testing

so, as i formatted to ext4 and mounted the seagate HDD i noticed the activity LED is blinking constantly, even when the drive is just initialized, nothing running on it, no data ever written to it.



this prevent sleeping of the drive and makes unnessesary wear, power consumption etc. I just want this drive to be spun up and used when i back up the vms once a day, then it should be sleeping for the rest of the time, but something prevents it.

could you please help me out what can i do with it? when i unmount it the writes will stop, so i could use a workaround to mount->backup->unmount but i rather not go into that route.


another note, that my USB HDD is sleeping happily, even with test backup data, images and such, see it's log below:



so far i tried disabling some services like "pve-ha-crm.service" and "pve-ha-lrm.service" but i could not see any effect, so i enabled them back.

thanks for help

 

[waltar]

Maybe iotop will show you the process which is writing.
If you mounted these disks (sda+sdb as your other 2 are named nvme0|1n0) eg with lsof /sda_mount will show the process to that disk also.

 

[sza]

lsof +D showed nothing, iotop -o gets spammed with other activity, not related to sda
however, after a few hours the drive writes have stopped completly. now its just chilling as expected.