July 5, 20233 yr I'm using Unraid 6.11.5. Currently, I'm able to start Array and enable VM/Docker services in Setting page. However, I'm NOT able to start any VM or Docker instances. It looks like something wrong with my cache disk, but I don't know how to analyze diagnostics logs. Could anyone help to read attached diagnostics log files, or tell me commands to check Btrfs? BTW, I'm using 2 Crucial MX500 1 TB SATA SSD disks as cache pool, and my NAS is HP Microserver Gen8. This is not the 1st time that I ran into issue. Last time, I reboot my NAS and the issue was gone (not same issue I think), but reboot doesn't work this time. Is there any known hardware compatibility issue with Unraid? Thank you in advance. tower-diagnostics-20230705-2311.zip Edited July 6, 20232 yr by bobbiewang
July 5, 20232 yr Community Expert Diags show that one of the devices dropped offline in the past, first thing to do is to run a correcting scrub, then post the results once it finishes.
July 5, 20232 yr Author JorgeB, appreciate your help. I searched "drop" in log files, but didn't get any useful information. Could you please let me know lines indicate devices dropped offline? I hope to analyze by myself in future. If I click cache disk to see details, I can see current "btrfs scrub status" is as following. Quote UUID: 81583c15-2a86-4ecb-ba00-acaca539c8ff no stats available Total to scrub: 230.91GiB Rate: 0.00B/s Error summary: no errors found Shall I manually run scrub with "Repair corrupted blocks" checked? Thanks.
July 5, 20232 yr Community Expert Solution 38 minutes ago, bobbiewang said: Could you please let me know lines indicate devices dropped offline? This line during pool mount shows a lot of read and writes errors, these happen when a device drops offline, in this case sdf: Jul 3 21:04:12 Tower kernel: BTRFS info (device sdg1): bdev /dev/sdf1 errs: wr 18821000, rd 1393297, flush 0, corrupt 0, gen 0 Also see here for more info and better pool monitoring. 40 minutes ago, bobbiewang said: Shall I manually run scrub with "Repair corrupted blocks" checked? Yes.
July 6, 20232 yr Author Thank you, JorgeB. I ran scrub on cache disk and results was shown in page as following. Quote UUID: 81583c15-2a86-4ecb-ba00-acaca539c8ff Scrub started: Thu Jul 6 16:31:16 2023 Status: finished Duration: 0:07:15 Total to scrub: 219.76GiB Rate: 517.32MiB/s Error summary: verify=1753 csum=277575 Corrected: 0 Uncorrectable: 0 Unverified: 0 I stopped and started Array for the 3rd time. Now, I'm able to start VM and Docker, but I'm not sure whether cache disk is fine or not...
July 6, 20232 yr Community Expert That was a correcting scrub? Don't see any correct errors, post new diags.
July 6, 20232 yr Author Excuse me, it's not a correcting scrub. I'm not sure whether there is a chance to damage data if "Repair corrupted blocks" is checked. So, I did scrub only before backup. I just finished data backup, and did a scrub with "Repair corrupted blocks" checked. Below is the result. Quote UUID: 81583c15-2a86-4ecb-ba00-acaca539c8ff Scrub started: Thu Jul 6 22:08:02 2023 Status: finished Duration: 0:09:16 Total to scrub: 219.76GiB Rate: 404.74MiB/s Error summary: verify=1681 csum=276561 Corrected: 278242 Uncorrectable: 0 Unverified: 0 Is my cache disk fine now? Shall I format the disk (sdf) to avoid the issue in future? Thanks.
July 6, 20232 yr Community Expert 55 minutes ago, bobbiewang said: Is my cache disk fine now? Should be, don't forget to check the link above for better pool monitoring.
July 6, 20232 yr Author 25 minutes ago, JorgeB said: Should be, don't forget to check the link above for better pool monitoring. That's great! Thank you very much.
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