Hyak will be offline from 9:00 am - 5:00 pm for scheduled maintenance the second Tuesday of every month. Every third month (quarterly), the maintenance window will last from 9:00 am to 9:00 the following morning.
Critical system maintenance will be performed in each scheduled maintenance period. Hyak system software will be updated as part of the quarterly maintenance. This includes patches to the OS, upgrades to standard system software, etc.
The cluster may be completely inaccessible during maintenance windows.