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<p>Dear Collaborators,</p>
<p>Please remember the announcement below. All JLab farm nodes
including the interactive farm, the work disk, and JupyterHub will
be unavailable starting tomorrow at 8am. This intervention will
likely last until Wednesday noon.</p>
<p>Please plan accordingly.</p>
<p>Best regards,</p>
<p>Alex<br>
</p>
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<b>From:</b> Wesley Moore<br>
<b>Sent:</b> Thursday, September 11, 2025 9:49 AM<br>
<b>To:</b> Wesley Moore via Jlab-scicomp-briefs
<a class="moz-txt-link-rfc2396E" href="mailto:jlab-scicomp-briefs@jlab.org"><jlab-scicomp-briefs@jlab.org></a><br>
<b>Subject:</b> Scheduled Outage: Farm Nodes & /work Areas
– Sept 23–24</div>
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Dear SciComp Users,</div>
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A <b>scheduled outage</b> is planned for <b>Tuesday, September
23 through noon on Wednesday, September 24</b>, affecting
<b>all farm nodes</b>, including <b>ifarm</b> and <b>JupyterHub</b>.</div>
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<b>Reason for Outage:</b></div>
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A <b>failing disk shelf</b> affecting the <code>/work</code> areas
requires urgent replacement. During this window, we will also
perform:</div>
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Reboots across farm nodes</p>
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Application of <b>Maintenance Day (MD)</b> system patches</p>
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Firmware updates to farm19, farm23, sciml</p>
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<b>Affected Systems:</b></div>
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All farm nodes</p>
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<code>/work</code> areas</p>
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ifarm</p>
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JupyterHub</p>
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<b>Downtime Window:</b></div>
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<b>Start:</b> Tuesday, September 23, 8am</p>
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<b>End:</b> By <b>noon, Wednesday, September 24</b></p>
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While we aim to restore services as promptly as possible, this
extended outage window allows for:</div>
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Safety of on-site personnel</p>
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Proper hardware replacement and testing</p>
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Confidence in system stability before resuming production</p>
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A follow-up <b>"all-clear" notice</b> will be sent when systems
are fully operational.</div>
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We appreciate your understanding and patience during this
essential maintenance.</div>
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Best regards,<br>
<b>Scientific Operations Team</b></div>
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