On Wed, Oct 27, 2010 at 03:33:01PM -0700, Xin LI wrote:
> Maybe something like:
> The -P option assumes that the underlying storage overwrites file block
> when data is written on existing offset. Several factors including the
> file system and its backing store could defeat the assumption, this
> includes, but is not limited to file systems that uses Copy-On-Write
> strategy (e.g. ZFS or UFS when snapshot is being used), or backing
> datastore that does journaling, etc. In addition, only regular files
> are overwritten, other types of files are not.
This sounds very nice and FreeBSD-ish.