Proxmox VE 7.3: Resize disk of running instances with disks in iSCSI storage

[jbe-dw]

Hello,

I have read a similar post with detailed step about that, the main difference is that each of my VM disks is a single LUN (not a large LUN that stores raw or qcow2 disk images). I can:

- Resize the disk on the SAN host
- Rescan iSCSI session and upgrade multipath size on the proxmox servers

I was able to resize the disk inside the vm after i shut it down then started it again.

However, the old size is still showing up in the instance hardware list, and the new size is not notified to the instance kernel (it needed a cold reboot). Is there a way to tell Proxmox to rescan the disk and update its size (in the GUI) and notify the VM.

I'm not sure if `qm resize` safely applies to this kind of disk.

Thank you
Jerome

 

[brj00]

I am dealing with a similar issue in my non-production lab and looking for answers. Did you ever figure out how to rescan the disk in Proxmox without having to recreate it?

 

[tvtue]

Hello, I am also interested in this topic. Have you tried this with 8.3 yet? Anything new ?

 

[tvtue]

Ok, I did a little test and it still seems to be like the original poster described it, i.e. after resizing the lun on the storage, doing iscsiadm session rescan and multipath map force reload and a cold start of the vm, then the size of the disk within the vm is the new size. But the hardware details still show the size like it was before. Trying to resize it with the gui result in the error:

volume resize is not possible on iscsi device at /usr/share/perl5/PVE/Storage/ISCSIPlugin.pm line 575.

 

[thulle]

I have a similar problem.
Resize on the San side dosent effect the hostside.
Newly createtd luns not fully active, without a restart of 3 out of 5 host in the cluster.

Running on 8.3.3 with 5 hosts, and Purestorage as Storage. Single lun pr Vm.
Regards

Jens