Does Proxmox check storage every 20 seconds ? [syslog: Very big device. Trying to use READ CAPACITY(16)]

[trent--]

I setup a Proxmox cluster, 3 nodes with an iSCSI storage.
The servers' syslog is spammed by this message every 20 seconds :
Mar 22 00:03:34 hostame kernel: sd 8:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16).

According to some info I found about this message :
http://lkml.iu.edu/hypermail/linux/kernel/0707.3/0998.html
https://stackoverflow.com/questions/32582583/warning-message-when-using-a-big-disk-and-iscsi

It seems like this is harmless, caused by the kernel trying to call a 10-byte version of a command, then using the 16-byte version of the command.
But I don't get why this is repeated every 20 seconds.
I'd like to know if people using huge iSCSI devices see this log spam every 20 seconds too ?
Is there anything in Proxmox that checks storage every 20 seconds, thus generating this log ?

 

[Dunuin]

Is there anything in Proxmox that checks storage every 20 seconds, thus generating this log ?

Not sure about iSCSI but for NFS and SMB Proxmox will call the remote storage (I think all 20 seconds) to check if it is still available.