Unknown periodically Disk Access when second ext4 partition is mounted

eikaramba

New Member
Mar 9, 2024
2
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Okay so i setup PBS fresh with a single 14TB Disk (no backup jobs scheduled or even configured yet). That disk has 2 partitions each 7TB
A(sdb1) is configured as a Zpool with ZFS and a single datastore on it
B(sdb2) is just a ext4 filesystem

As soon as i edit /etc/fstab and mount partition B
UUID=XXXX /Shared ext4 rw,nofail 0 2

and then reboot i get a periodically unlimited disk access every 500ms or so. Really short. it is preventing deep sleep and also is quite annoying. When i remove that line from fstab and reboot it is gone again.

I am pulling my hairs to find out why this is. With htop i was at least able to see the process that seems to be responsible for this:
1710012125495.png

zpool status is just giving me:
pool: BackupPool
state: ONLINE
config:

NAME STATE READ WRITE CKSUM
BackupPool ONLINE 0 0 0
sdb1 ONLINE 0 0 0

errors: No known data errors


I'm unfortunately at the end of my knowledge. I wanted to use the ext4 partition for a simple samba share, because i am using macrium reflect to backup my windows pc and then would save it there. i first tried to have both partitions as zfs but the performance with samba/nfs was bad somehow. but that is another story....

i found this related threads (no solution as well):
https://forum.proxmox.com/threads/periodic-4s-disk-writes.107404/
 
Last edited:

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