  OpenVMS and UPS Power? 
 The Question is:
 
Is there a feature within the OpenVMS O/S to start a delayed shutdown(say 10
mins) on power failure. Assuming a suitable UPS is available.
 
How is a UPS configured or enabled within OpenVMS. If not are there any
Compaq / Digital approved solutions?
 
How would I work out what UPS rating is required for my machine / cluster.
Is there a chart or reference somewhere?
 
How do I see a DEC node not within my cluster area under Phase V
 
I have a DEC Alpha cluster
 
Thanks in antisipation for your efforts
 
Grant
 
 The Answer is:
 
  Information on power consumption can be derived by metering the power
  (Dramitz is one well-known line monitor, existing power distribution
  systems often include meters), from the power requirements (amp hours,
  watt seconds, or similar) for the individual components (usually listed
  near or on the serial number sticker), or based on tables such as those
  in the various Systems and Options Catalogs.
 
  Delayed shutdown is trivial, requiring only the notification of a
  switchover from line power to UPS power from the UPS (or of impending
  battery exhaustion).  Different UPS packages provide different means of
  notification -- some use serial ASCII text, some use the modem control
  signals on a serial line, and other forms of communications are possible.
  (The exact mechanism of UPS communications depends on the particular UPS.)
  When the notification is received, the server (possibly little more than
  a DCL command procedure) invokes the necessary functions, which can
  include SHUTDOWN.
 
  Information on available UPS packages and configurations has been available
  in various Systems and Options Catalogs, as well as software.
 
  The usual approach to see if a node is reachable -- DECnet Phase IV or
  DECnet-Plus -- is to attempt to reach it.  Testing for reachability adds
  an unnecessary layer of complexity, as software must still contend with
  a node that is no longer reachable or that becomes unreachable.  Tools
  in this area include NCP and NCL, TCP/IP ping, DCL task-to-task, and
  DTR/DTS.
 
