It’s been ~10 years since I was at Fermilab working on the CMS Tier 1 team; when I was still new on the team, I expressed concern about data loss due to scheduled maintenance on our Nexsan clusters (coming from the private sector) and my boss would chuckle and say “Don’t worry, they’re always making more data”. Also, scheduled maintenance windows during the day! As an ops guy, I was spoiled for that period of time in my career.