ErikM1970 Posted April 28, 2019 Share Posted April 28, 2019 Good evening, I am relatively new to unRAID and I can say so far it has been a very good experience. There is just one issue I cannot seem to figure out. My system will be humming along nicely and out of the blue a warning appears indicating "BTRFS cache pool missing devices". I have a two drive cache configured and periodically one of the cache devices (not always the same one) just disappears. I've read through the forums and found other instances; however, some of these messages are dated and the version running was much older than my 6.6.7. The only way I can get the cache drive to return is by completely powering down the system and then turning it back on again--apparently a reboot isn't sufficient. I have attached my Diagnostics file and am hoping someone here can point me in the right direction. Today, April 28, 2019 at 5:29 PM EDT was the latest occurrence. Thank you, Erik nexus-diagnostics-20190428-1928.zip Quote Link to comment
JorgeB Posted April 29, 2019 Share Posted April 29, 2019 There is problem with the NVMe device: Apr 28 14:38:47 Nexus kernel: print_req_error: critical medium error, dev nvme0n1, sector 90558672 Apr 28 14:38:47 Nexus kernel: print_req_error: critical medium error, dev nvme0n1, sector 90558912 Apr 28 14:38:47 Nexus kernel: print_req_error: critical medium error, dev nvme0n1, sector 90559168 Apr 28 14:38:47 Nexus kernel: print_req_error: critical medium error, dev nvme0n1, sector 90558680 Apr 28 14:38:47 Nexus kernel: print_req_error: critical medium error, dev nvme0n1, sector 90559424 Apr 28 14:38:47 Nexus kernel: BTRFS info (device sdh1): read error corrected: ino 9883863 off 1115926528 (dev /dev/nvme0n1p1 sector 90558616) Apr 28 16:19:15 Nexus crond[2667]: exit status 1 from user root /usr/local/sbin/mover &> /dev/null Apr 28 17:01:37 Nexus kernel: mdcmd (116): spindown 2 Apr 28 17:21:05 Nexus kernel: mdcmd (117): spindown 1 Apr 28 17:24:48 Nexus kernel: nvme nvme0: I/O 18 QID 3 timeout, aborting Apr 28 17:24:48 Nexus kernel: nvme nvme0: I/O 19 QID 3 timeout, aborting Apr 28 17:24:48 Nexus kernel: nvme nvme0: I/O 20 QID 3 timeout, aborting Apr 28 17:24:48 Nexus kernel: nvme nvme0: I/O 21 QID 3 timeout, aborting Apr 28 17:25:18 Nexus kernel: nvme nvme0: I/O 18 QID 3 timeout, reset controller Apr 28 17:25:48 Nexus kernel: nvme nvme0: I/O 0 QID 0 timeout, reset controller Apr 28 17:27:19 Nexus kernel: nvme nvme0: Device not ready; aborting reset Apr 28 17:27:19 Nexus kernel: nvme nvme0: Abort status: 0x7 ### [PREVIOUS LINE REPEATED 3 TIMES] ### Apr 28 17:28:20 Nexus kernel: nvme nvme0: Device not ready; aborting reset Apr 28 17:28:20 Nexus kernel: nvme nvme0: Removing after probe failure status: -19 Apr 28 17:28:20 Nexus kernel: nvme nvme0: Device not ready; aborting reset This is a hardware problem, there were read errors and it eventually dropped offline. Quote Link to comment
Opawesome Posted September 19, 2019 Share Posted September 19, 2019 On 4/29/2019 at 1:38 AM, ErikM1970 said: The only way I can get the cache drive to return is by completely powering down the system and then turning it back on again--apparently a reboot isn't sufficient. nexus-diagnostics-20190428-1928.zip 188.3 kB · 3 downloads Hi Erik, I have the same problem on unRaid version 6.7.2 with a brand new Crucial P1 500GB NVME SSD. Have you manage to fix this issue by any chance ? With thanks, G Quote Link to comment
ErikM1970 Posted September 20, 2019 Author Share Posted September 20, 2019 Good morning, In my situation, I ended up visiting the Supermicro website and checked to see which NVMe drives they tested/certified for use with my system board. I was able to find a Toshiba 1TB NVMe drive that was certified and went ahead and installed it in place of the Crucial NVMe. I can tell you that the results were much better but not perfect. I did have one recurrence where it disappeared. Once I power-cycled the system and scrubbed the drive pool, all was well again. As of this posting, no more problems. I'm hoping this will improve with future releases of UnRAID; however, for now, it is tolerable and just a minor inconvenience--as opposed to a major disruption when using the Crucial NVMe. Hope this helps, Erik Quote Link to comment
Opawesome Posted September 20, 2019 Share Posted September 20, 2019 Hi Definitely helpful. Especially knowing now that you too had a Crucial SSD. I just ordered an Intel 660p. I will run tests when I get it and keep the forum informed. Cheers G Quote Link to comment
ErikM1970 Posted September 20, 2019 Author Share Posted September 20, 2019 Good luck! Quote Link to comment
Opawesome Posted September 29, 2019 Share Posted September 29, 2019 On 9/20/2019 at 6:50 PM, Opawesome said: I just ordered an Intel 660p. I will run tests when I get it and keep the forum informed. I replaced the Crucial P1 with the Intel 660p about 5 days ago and have not noticed any problem. Fingers crossed ! Quote Link to comment
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