Cannot move large disk images

[tapsa]

Virtual Environment 7.2-7
2 NFS shares. 24TB free space at target mount. Both nfs servers use ZFS on linux.

Offline storage move give following error:

create full clone of drive scsi1 (ssdpool-proxmox-nfs42:104059/vm-104059-disk-2.raw)
Formatting '/mnt/pve/slow-nobackup/images/104059/vm-104059-disk-0.raw', fmt=raw size=6597061378048 preallocation=off
transferred 0.0 B of 6.0 TiB (0.00%)
qemu-img: output file is smaller than input file
TASK ERROR: storage migration failed: copy failed: command '/usr/bin/qemu-img convert -p -n -f raw -O raw /mnt/pve/ssdpool-proxmox-nfs42/images/104059/vm-104059-disk-2.raw zeroinit:/mnt/pve/slow-nobackup/images/104059/vm-104059-disk-0.raw' failed: exit code 1

With smaller disks there is no problem to move disk. But with 6TB disks looks that move does not work at offline or online.
Is this bug or some kind configuration issue?

 

[fiona]

Hi,
can you post the output of the following?

pveversion -v
qemu-img info --output=json $(ssdpool-proxmox-nfs42:104059/vm-104059-disk-2.raw)
qemu-img create -o preallocation=off -f raw /mnt/pve/slow-nobackup/test.raw 6442442752K
qemu-img info --output=json /mnt/pve/slow-nobackup/test.raw
qemu-img convert -p -n -f raw -O raw /mnt/pve/ssdpool-proxmox-nfs42/images/104059/vm-104059-disk-2.raw zeroinit:/mnt/pve/slow-nobackup/test.raw
rm /mnt/pve/slow-nobackup/test.raw

Of course make sure you don't already have an important test.raw there and you don't have to wait for the convert command to finish if it actually works like this