Storage Bus Cache
Storage Bus Cache is a Windows Server feature that binds faster drives to HDD capacity on a standalone Storage Spaces server.
The documented Server 2022 setup needs the Failover Clustering feature installed but excludes cluster membership and all-flash systems. [1]
For resilient mirror-accelerated-parity volumes, this cache handles reads; the ReFS mirror tier separately absorbs writes in Shared mode. Simple spaces allow read/write caching without drive-failure tolerance. Shared mode reserves part of the faster media for cache rather than dedicating every fast drive. [1]
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Sources & caveats
- Documentation review, not a Windows experiment. Scope follows the tutorial's explicit prerequisites, not its broader applicability banner. No measured performance or failure-rate claim.