[教學] nvme ssd controller is down in Linux, and how to solve this problem

t1066

啱啱換機，加咗隻WD SN550落部機，但會有
nvme nvme0: controller is down; will reset
呢個問題。另外會見到
EXT4-fs error (device nvme0n1p3): __ext4_find_entry
呢類error，如果你用嘅係其他嘅filesystem，就會係另一類嘅error。上網睇過，可以係kernel parameter加上
nvme_core.default_ps_max_latency_us=5500
嚟解決。暫時行咗六個鐘再無以上問題。