Re: [Qemu-devel] [PATCH v3 2/4] qcow2: Document some maximum size constraints

[Alberto Garcia]

> Note that L1 and L2 fields both stop at bit 55 currently, but do have
> room for expansion up to bit 61; so all three limits (if we include
> refcount table in the set capped at bit 55 for now) could be raised
> simultaneously if we find 64P too small in the future.

64 petabytes ought to be enough for anybody :-)

Berto