hello
if we create a qcow2 file on a block dev. we can,t get the right disk size by qemu-img info。 [root@host-120-79 qemu]# ./qemu-img create -f qcow2 /dev/zs/lvol0 1G Formatting '/dev/zs/lvol0', fmt=qcow2 size=1073741824 cluster_size=65536 lazy_refcounts=off refcount_bits=16 [root@host-120-79 qemu]# ./qemu-img info /dev/zs/lvol0 image: /dev/zs/lvol0 file format: qcow2 virtual size: 1.0G (1073741824 bytes) disk size: 0 cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false Then we get disk size from L1 table and L2 table in qcow2_get_allocated_file_size. May be we can submit the patch to qemu master??