May 10, 20242 yr Community Expert Randomly looked in my syslog this evening and saw that one nvme drive in my cache pool was dropped. Now I see in the UI that my cache pool is degraded. The nvme that was dropped is the older of the 2 drives. I have posted diagnostics. What's my next step before rebooting? I have added nvme_core.default_ps_max_latency_us=0 pcie_aspm=off to my go file as advised in a similar thread I found. tower-diagnostics-20240509-2104.zip
May 10, 20242 yr Community Expert 4 hours ago, adammerkley said: What's my next step before rebooting? Rebooting might not be enough to bring the device back, a power cycle usually does it, then just start the array normally and the dropped should be brought up to sync automatically, but you can run a scrub to confirm all is OK.
May 10, 20242 yr Author Community Expert Yup, rebooting brought the device back, then I cleared the pool error and ran a scrub. Shortly after, the device was offline again and the pool degraded. I'm going to replace the nvme drive.
May 11, 20242 yr Author Community Expert Solution Replaced the failed Sabrent Rocket 4.0 nvme drive with a Samsung 980 Pro drive. Thanks to zfs the procedure went without a hitch.
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