247-IT Guides
Guides
Tool-independent background on UPS monitoring, Hyper-V and graceful shutdown during a power outage — what actually goes wrong in practice, and what doesn't.
All guides
Hyper-V Failover Cluster Power Outage
Why a half-shut-down cluster is more dangerous than a fully shut-down one — securing quorum, Cluster Shared Volumes and live migration during a UPS outage.
Active Directory & Power Outages
The USN rollback myth, what's actually risky for domain controllers during a hard power outage — and why Hyper-V checkpoints on DC VMs are the real problem.
SQL Server & Exchange on Hyper-V
Why the database engines themselves are robust against power loss — and where the real risk lives: write caching, shutdown order and VSS.
PowerChute Alternative for Hyper-V
What APC PowerChute Network Shutdown does well, where it hits limits for mixed UPS fleets and Hyper-V-first environments — and when a purpose-built tool pays off.
Calculating UPS Runtime Correctly
Why the datasheet runtime rarely holds — load, battery age and temperature change the real remaining runtime, and what that means for threshold configuration.
Monitoring UPS Units From Multiple Vendors
Every UPS brand ships its own management software — why that's not a technical necessity, and what SNMP and NUT change as a common denominator for mixed fleets.
UPS Monitoring Without Shutdown (Enterprise)
Monitoring UPS units globally or one by one without shutdown, warning thresholds for battery, load, temperature and input voltage, on-demand or scheduled UPS self-tests, and how the notifications reach your existing monitoring.