On top of everything let's add that mentioned feature is part of Siemens bundle 
of NetWorker.  For years they have been adding some nice features to their 
versions (some specific to Sinix).  Here is an example for v7.2:
http://serviceportal.sbs.de/technics/technics/fgm_en/sinix/rnc00528_02_en.htm

As for original question, just put the drives to service mode and that should 
do it.

Cheers,
H


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