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I have no trim support on the host (it has normal hdds), but I want to save disk space with trim (already overprovisioned). Does this mean this is only possible if you have trim support for the storage on the hypervisor?

Hi, I want to get fstrim working with no luck so far. What I did so far: 1. Switched from virtio-blk to virtio-scsi (changed the disc to scsi0 and changed the emulated scsi-controller to VIRTIO) 2. Switched discard=on as parameter for the disk 3. mounted the ext4 filesystem with discard It...