[PVE-User] Cannot move disk - "output file is smaller than input file"

Lindsay Mathieson lindsay.mathieson at gmail.com
Wed Apr 27 02:01:45 CEST 2016

Getting this when trying to move a Ceph RBD image to NFS. 100% reproducable
at the moment.

create full clone of drive ide0 (ceph1:vm-401-disk-1)
Formatting '/mnt/pve/VMSecondary/images/401/vm-401-disk-1.qcow2', fmt=qcow2
size=136365211648 encryption=off cluster_size=65536 preallocation=metadata
lazy_refcounts=off refcount_bits=16
transferred: 0 bytes remaining: 136365211648 bytes total: 136365211648
bytes progression: 0.00 %
qemu-img: output file is smaller than input file
TASK ERROR: storage migration failed: copy failed: command
'/usr/bin/qemu-img convert -t writeback -p -n -f raw -O qcow2
zeroinit:/mnt/pve/VMSecondary/images/401/vm-401-disk-1.qcow2' failed: exit
code 1

I've seen this before and worked round it by backing up and restoring, but
I can leave this for a while if needed for testing.


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