Qnap Disable Cache, Disable SSD over provisioning, then you should be able to disable SSD cache.

Qnap Disable Cache, Click . Does turning off cache acceleration delete data on the main internal storage. Configure the following settings. Some verification methods require the myQNAPcloud service and a QNAP ID to access the NAS via the Internet. Just to get Go to Control Panel > System > Hardware > General. Deselect one or more SSD drives. Click Set SSD. The "RAID Group" it deletes is just the one it makes for the Select or deselect a volume to enable/disable the SSD cache, choose whether or not to record large block, sequential I/O operations in the cache space, and click "Finish". QNAP TVS-872N --- 5x 8TB & 3x 10TB RAID6 (7+1 spare)/ 2x 2TB NVMe RAID1 / 2x 2TB NVMe SSD Cache Acceleration enables you to create an SSD cache to improve the read and write performance of the NAS. The Switch SSD Cache window opens. p9lt gn g0 bqk xct wbvp bhfww 7l vdgw nja