Topic: vsan
All articles tagged “vsan”.
2026
Capacity planning: ESA vs OSA, what really changes
Switching from OSA to ESA changes how you size a vSAN cluster. We compare the two models side by side: usable capacity, headroom, and the new rules.
RAID-5/6 on vSAN ESA: what replaces the write penalty
ESA replaces read-modify-write with a durable log and aligned full-stripe writes, while vSAN 9.1 still documents a possible RAID-1 advantage.
vSAN upgrades without downtime: ESA rolling patterns
Roll ESX upgrades through vSAN ESA one host at a time: choose an evacuation mode, control resync, and stop safely when capacity or policy blocks progress.
VCF 9.1: the infrastructure efficiency that justifies -40% TCO
NVMe memory tiering, global vSAN dedup, vSphere ZTP, 5000-host scale: what actually changes in VCF 9.1 on the infrastructure cost side, decoded for architects.