Dears,
I would like to remind this long-running issue affecting many SSD drives’ power-states on Linux and the particular case of the WD Green SN350 1TB.
Symptom: Device’s apparent disconnection leading to remout-ro (and possible filesystem corruptions)
nvme 0000:04:00.0: controller is down; will reset: CSTS=0xffffffff, PCI_STATUS=0x10
Affected devices: SN350 at its latest (and unique) firmware version: 33006000
Reason: nvme switch to p4 power-state (in a non-standard/buggy/… way)
Culprit: WD for not providing an updated firmware ensuring compatible sleeping-mode.
Workaround: Disable the p4 power-state.
HowTo: nvme_core.default_ps_max_latency_us=11500
Device power-state details:
$ nvme id-ctrl /dev/nvme0
vid : 0x15b7
ssvid : 0x15b7
sn : 22292H......
mn : WD Green SN350 1TB
fr : 33006000
[...]
ps 0 : mp:5.00W operational enlat:0 exlat:0 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:0.6300W active_power:5.00W
ps 1 : mp:2.40W operational enlat:0 exlat:0 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:0.6300W active_power:2.40W
ps 2 : mp:1.90W operational enlat:0 exlat:0 rrt:0 rrl:0
rwt:0 rwl:0 idle_power:0.6300W active_power:1.90W
ps 3 : mp:0.0250W non-operational enlat:3900 exlat:11000 rrt:3 rrl:3
rwt:3 rwl:3 idle_power:0.0250W active_power:-
ps 4 : mp:0.0050W non-operational enlat:5000 exlat:39000 rrt:4 rrl:4
rwt:4 rwl:4 idle_power:0.0050W active_power:-
What is desirable: A firmware update from WD to fix this problem.
