August 22, 2025Aug 22 I have two 2TB NVMe drives in btrfs raid 1 for cache. nvme2n1 and nvme3n1. nvme3n1 was reporting errors and a scrub couldn't fix it. I wanted to remove nvme3n1 from the pool so I stopped the array, removed the pool, added pool back with 1 slot and nvme2n1, but when I go to restart the array, I get: CacheINTEL_SSDPEKNU020TZ_BTKA312103AM2P0C - 2 TB (nvme2n1)33 °C0.0 B/s0.0 B/s0btrfsUnmountable: wrong or no file systemIs there any way to get the array to restart with the supposedly good nvme2n1, or is it also corrupted beyond repair and need to replace and restore from backup?Thanks in advance unraid-diagnostics-20250822-1639.zip
August 23, 2025Aug 23 Author 1 hour ago, JorgeB said:Post the output frombtrfs fi showLabel: none uuid: 9e7e00da-48c5-4dae-9371-25e83b91f33c Total devices 2 FS bytes used 466.13GiB devid 4 size 1.86TiB used 1.86TiB path /dev/nvme2n1p1 devid 5 size 1.86TiB used 1.77TiB path /dev/nvme3n1p1
August 23, 2025Aug 23 Community Expert Solution on main click on the pool and then "remove pool"back on main, create a new pool with the same name and 2 slotsassign both pool device, leave the filesystem set to autostart the array and post new diags.
August 23, 2025Aug 23 Author 6 minutes ago, JorgeB said:on main click on the pool and then "remove pool"back on main, create a new pool with the same name and 2 slotsassign both pool device, leave the filesystem set to autostart the array and post new diags.Looks like /dev/nvme3n1p1 really is defective and I'll need to replace it. unraid-diagnostics-20250823-0111.zip
August 23, 2025Aug 23 Community Expert Don't see anything so far that suggests a device problem; do see filesystem issues. Try scrubbing the posol and post the results from the GUI
August 23, 2025Aug 23 Author 10 hours ago, JorgeB said:Don't see anything so far that suggests a device problem; do see filesystem issues. Try scrubbing the posol and post the results from the GUIWow, I can't believe it. Looks like everything is working again! Thank you so much for your help!
August 24, 2025Aug 24 Community Expert All errors were corrected; I recommend resetting the stats and keeping monitoring the pool https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-700582
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