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+===== May 2, 2023: planned maintenance =====
+ILRI ICT is planning some major maintenance on our Nairobi infrastructure during the upcoming weekend.
+Due to the invasive nature of the maintenance, the HPC will be inaccessible for several hours on the mornings of Saturday, May 6th and Sunday, May 7th beginning at 08:00 AM. Please refrain from submitting long-running jobs as they will be suspended or may be interrupted unexpectedly.
+We will notify you when the maintenance is finished, after which time you can re-submit your jobs.
+===== March 23, 2023: planned maintenance/upgrade =====
+I am planning to upgrade the HPC's backend storage systems to a new version of their operating system (CentOS)¹ on Monday, March 27rd at 9AM (EAT). Due to the invasive nature of these upgrades I will need to stop existing SLURM jobs and restrict access to the clsuter. The work will probably take the entire morning.
+---
+¹ Technically speaking, we are upgrading from CentOS 7 to CentOS Stream 8, which is the same upgrade I've performed on several compute nodes over the past few months. This is a major upgrade that we only perform every five years or so, and will modernize and increase security on HPC.
 ===== November 15, 2022: planned maintenance/upgrade =====