bhyve, Windows guest and trim support

[Andrea Venturoli]

On 2020-07-12 15:13, Felix Palmen wrote:
> * Andrea Venturoli <ml at netfence.it> [20200707 18:18]:
>> I have yet to try this, but, as I said, I switched temporaly to ahci-hd and
>> used the instructions at the following link to reclaim space (without the
>> need to start a new zvol):
>>
>> https://winaero.com/blog/trim-ssd-windows-10/
> 
> Thanks for this hint, I can now confirm this also works with virtio-blk
> (applied Allan's patch to 12.1). REFER for the zvol backing my Windows
> Server 2016 dropped from 315G to 72.5G.

Hmm...
I applied the same patch and, still using virtio-blk, when trying to 
retrim, Windows says "Optimize-Volume : The volume optimization 
operation requested is not supported by the hardware backing the volume."
Seems like the guest doesn't think TRIM support is available.
Do I have to set anything?

I have the following in the machine config (I'm using vm-bhyve):
disk0_type="virtio-blk"
disk0_name="disk0"
disk0_dev="zvol"
disk0_opts="sectorsize=512"


  bye & Thanks
	av.