Note that the below refers to the volatile cache on HDDs, not any cache (BBU or 
FBWC or otherwise) on a RAID HBA, which is a completely different matter.

Disabling the volatile write cache on HDDs can significantly improve op latency.

> On Oct 14, 2025, at 11:30 AM, Kirby Haze <[email protected]> wrote:
> 
> 
> On another note, maybe check as well if you have writeback caches disabled
> since you are on hdds. write through mode is generally recommended.
> https://docs.ceph.com/en/latest/start/hardware-recommendations/#write-caches

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