Samsung SSD 990 PRO with Heatsink 2TB I am having the exact same issue /dev/nvme1n1, /dev/ng1n1, S73HNJ0XB03717R is having the issue. I have just enabled this and also updated the firmware on both drives, let's see how I go. linux /bzimage nvme_core.default_ps_max_latency_us=0 pcie_aspm=off pcie_port_pm=off root@Tower:~# nvme list Node Generic SN Model Namespace Usage Format FW Rev --------------------- --------------------- -------------------- ---------------------------------------- ---------- -------------------------- ---------------- -------- /dev/nvme0n1 /dev/ng0n1 S73HNJ0XB03688K Samsung SSD 990 PRO with Heatsink 2TB 0x1 1.05 TB / 2.00 TB 512 B + 0 B 4B2QJXD7 /dev/nvme1n1 /dev/ng1n1 S73HNJ0XB03717R Samsung SSD 990 PRO with Heatsink 2TB 0x1 888.44 GB / 2.00 TB 512 B + 0 B 4B2QJXD7 /dev/nvme2n1 /dev/ng2n1 2324E6E265B9 CT4000P3SSD8 0x1 4.00 TB / 4.00 TB 512 B + 0 B P9CR30A