On Fri, 21 Nov 2008 15:08:04 -0600, just as I was about to take a
herb, Richie Hardwick disturbed my
reverie and wrote:

From Diskeeper (inside the running program):

Thanks for that Richie. The following is an official response from
Raxco that I have been asked to post on their behalf as they are
having issues posting here.

"The Vista system restore does use shadow copy so it is affected by
this VSS issue.

Microsoft has not updated the article but Raxco has confirmed that
they deal with this quite a lot and changing the cluster size to 16K
has resolved this each time. This applies to any Windows OS running
VSS, including Vista.

Unless a drive has been formatted with a cluster size that is a
multiple of 16k, VSS detects defrag activity as changes to the drive
and can purge shadow copies. The problem is that the default cluster
size on format is 4k. If the cluster size is 16k or greater, then VSS
can "handle" defrag activity and is less likely to purge shadow
copies.

PerfectDisk provides an option to run in VSS compatible mode by
default which will attempt to limit the file movements but this may
not be enough. You may get better results running the defragmentation
only mode than SmartPlacement as it performs less file movements."
--

Cheers,

DrT

** Stress - the condition brought about by having to
** resist the temptation to beat the living daylights
** out of someone who richly deserves it.