Implementation Question: How does WHS verify end to end data transmission? RRS feed

  • Question

  • As users, we want to know that we can reliably restore data.  Does WHS guarantee that a restored data cluster exactly matches the original?  I haven't found any technical statements that WHS does guarantee this nor how.  The backup and restore process involves two computers, two hard disks and two transmissions over a network.  What does WHS do to ensure reliability end to end?

    Many single desktop solutions go part way by verifying that at backup time that data read from backup media matches the original.  They don't guarantee that the media didn't degrade before you used it to restore a file.

    As a two computer solution, WHS could compute and save checksums on both machines (is the hash it computes for each cluster a checksum?); disagreement between a saved checksum of an original cluster and a fresh checksum of a restored cluster would be a sure indication of failure.  Does WHS do anything like this?  This would be a nice advantage for WHS if it does it.  Alternatively, do we just trust the WHS process to "work"?
    Tuesday, January 5, 2010 5:26 PM