Trouble to resize Passthrough Physical Disk to Virtual Machine

[felie]

Hi
for large partitions located in iSCSI SAN (~100To), I use Passthrough Physical Disk to Virtual Machine and the "qm set" command to add the iSCSI LUN as new virtual SCSI disk to the VM.
But when I resize the SAN iSCSI volume, I see that /dev/disk size is upgrade on proxmox server, but upgrade information seem to not be forwarded to the virtual machine (noting in kernel message after scsi rescan).
I hope it would work fine if I change the disk scsi size in the `vm`.conf file and reboot de VM, but becaus the VM is a data nfs server used by several VM for intensive computing, I need to resize the Passthrough Physical Disk without reboot the VM.
Do you have any suggestion, please ?

 

[felie]

I did not resolve the trouble but I found a workaround : I migrated the VM to an other PVE node and migrate back. I also notice that for Passthrough Physical Disk, the disk size indicated in the `VMID`.conf file is not used.
If you have an idea howto to refresh QEMU passthrough HARDDISK informations sent to the VM without reboot or migrate it, I am interested.