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<p class="Paragraph SCXW48561379 BCX0" lang="EN-US" style="margin:0px;user-select:text;overflow-wrap:break-word;font-weight:normal;font-kerning:none;text-align:left">
<span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">Jefferson
Lab facilities management discovered a leak in the chilled water supply pipe for data center cooling. Investigating and repairing the leak requires that the data center operate on a rental chiller, which is now installed and connected outside CEBAF Center. </span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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<span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><br>
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<span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">The
</span><span class="SpellingError SCXW48561379 BCX0" style="margin:0px;user-select:text;background-repeat:repeat-x;background-position:left bottom;background-image:url("data:image/gif;base64,R0lGODlhBQAEAJECAP////8AAAAAAAAAACH5BAEAAAIALAAAAAAFAAQAAAIIlGAXCCHrTCgAOw==":base64,R0lGODlhBQAEAJECAP////8AAAAAAAAAACH5BAEAAAIALAAAAAAFAAQAAAIIlGAXCCHrTCgAOw==");border-bottom:1px solid transparent">JLab</span><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text"> Facilities
Management & Logistics team will switch over from the data center's current chilled water source to this rental unit tomorrow, 8/2/22, at 8AM. The work will begin with a 48-hour reliability test of the temporary chiller before the main chilled water lines
are taken out of service. After the 48-hour test, digging and repair work will begin, and the temporary chiller will be the sole source of cooling for the farm and HPC portion of the data center. </span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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<span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><br>
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<p class="Paragraph SCXW48561379 BCX0" lang="EN-US" style="margin:0px;user-select:text;overflow-wrap:break-word;font-weight:normal;font-kerning:none;text-align:left">
<span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">The
highest outage risk in case of a cooling failure is to compute nodes and the tape library. The core computing functions, including business systems, networking, and file servers have a second, fully redundant cooling system that does not depend on the chilled
water supply to remain operational.</span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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<span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><br>
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<span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">Although
no outage is anticipated, there is an increased risk of a cooling failure affecting the compute farm and LQCD clusters. In the event of a cooling outage, clusters will be shut down until cooling is restored and users will be notified. There is no action needed
on the part of scientific </span><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">computing users</span><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">. The temporary chiller will remain in
place for the duration of the repair, which could take a few weeks to complete.</span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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<span data-contrast="auto" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-variant-ligatures:none !important;font-size:11pt;line-height:18.3458px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text"></span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:11pt;line-height:18.3458px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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<span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">Please
direct any questions to Bryan Hess, </span></span><a class="Hyperlink SCXW48561379 BCX0" href="mailto:bhess@jlab.org" target="_blank" rel="noreferrer noopener" style="margin:0px;user-select:text"><span data-contrast="none" lang="EN-US" class="TextRun Underlined SCXW48561379 BCX0" style="margin: 0px; user-select: text; font-size: 12pt; text-decoration: underline; line-height: 20.5042px; font-family: Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif; color: rgb(5, 99, 193);"><span class="NormalTextRun SCXW48561379 BCX0" data-ccp-charstyle="Hyperlink" style="margin:0px;user-select:text">bhess@jlab.org</span></span></a><span data-contrast="none" lang="EN-US" class="TextRun SCXW48561379 BCX0" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"><span class="NormalTextRun SCXW48561379 BCX0" style="margin:0px;user-select:text">.</span></span><span class="EOP SCXW48561379 BCX0" data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}" style="margin:0px;user-select:text;font-size:12pt;line-height:20.5042px;font-family:Calibri, Calibri_EmbeddedFont, Calibri_MSFontService, sans-serif"> </span></p>
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