<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444">Hi, <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><span class="" style="" id=":26m.1" tabindex="-1">SLAC</span> is planning to perform preventive maintenance of two substations during the winter shutdown one of which distributes power to the building housing all scientific computing.  The planned shutdown is set to begin the evening of December 20th and will last through January 6th.  During this time, nearly all computing services will be unavailable including the <span class="" style="" id=":26m.2" tabindex="-1">login</span> nodes (e.g. rhel6-64), batch nodes, <span class="" style="" id=":26m.3" tabindex="-1">nfs</span> and <span class="" style="" id=":26m.4" tabindex="-1">gpfs</span>.  Backup generators will be used to keep some essential services up during the shutdown including email. <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444">The backup generators will be tested during the week of December 16 and will cause an interruption of all computing services for a few hours.  As soon as the date becomes concrete, I will forward along the details. <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444">Best, <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444">--Omar Moreno<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"> <br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:#444444"><br></div><br></div>