>>> kosgen3 /home/t3ch # nvme smart-log /dev/nvme0n1
... Smart Log for NVME device:nvme0n1 namespace-id:ffffffff
... critical_warning : 0
... temperature : 32 °C (305 K)
... available_spare : 100%
... available_spare_threshold : 10%
... percentage_used : 0%
... endurance group critical warning summary: 0
... Data Units Read : 251020 (128.52 GB)
... Data Units Written : 826286 (423.06 GB)
... host_read_commands : 2055456
... host_write_commands : 3658450
... controller_busy_time : 38
... power_cycles : 16
... power_on_hours : 103
... unsafe_shutdowns : 13
... media_errors : 0
... num_err_log_entries : 0
... Warning Temperature Time : 0
... Critical Composite Temperature Time : 0
... Temperature Sensor 1 : 32 °C (305 K)
... Temperature Sensor 2 : 33 °C (306 K)
... Thermal Management T1 Trans Count : 0
... Thermal Management T2 Trans Count : 0
... Thermal Management T1 Total Time : 0
... Thermal Management T2 Total Time : 0
**Nice – your NVMe is reporting a *clean* health snapshot.**
The `nvme smart-log` you pasted shows:
| Field | Value | Why it matters |
|-------|-------|----------------|
| `critical_warning` | 0 | No fatal flags set |
| `temperature` | 32 °C | Well below any thermal limit |
| `available_spare` | 100 % | No wear‑out detected |
| `percentage_used` | 0 % | Practically brand‑new |
| `media_errors` | 0 | No read/write failures |
| `num_err_log_entries` | 0 | No error log entries |
So, from a *hardware‑facing* perspective the drive is healthy.
That means the slowdown you’re seeing (or the “work‑slowlier” state with `-j2`) is almost certainly **not**
a failing NVMe.
The culprit is somewhere else—driver, firmware, BIOS, or an unrelated software hiccup that happens to hit
the NVMe occasionally.
Below is a quick play‑book to isolate the real problem and then safely bump your `-j` count back up.