ZFS Volumes, UFS, and TRIM

Bigby James bigby.james at dimthoughts.com
Wed Apr 15 12:26:56 UTC 2015

On 04/15, Fabian Keil wrote:
> Bigby James <bigby.james at dimthoughts.com> wrote:
> > Hey folks. I'm having some trouble finding info on a specific ZFS use case: I'm
> > wondering if a ZFS volume on an SSD, formatted to UFS, is covered by native ZFS
> > TRIM support, or if it needs to be enabled on the "embedded" UFS filesystem
> > written to the zvol itself. I see by the man page that by default the OS sees
> > the volume as an ordinary GEOM device, which leads me to infer that TRIM needs
> > to be set using newfs(8) or tunefs(8), but I'm uncertain.
> You came to the right conclusion.
> Fabian

Excellent, thanks for the response. Take care.


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