March 5, 20251 yr Perhaps unrelated but I was able to eliminate UDMA CRC errors on drive 3 by disabling Tailscale. Top showed Tailscale activity when errors were occurring. Since disabling Tailscale, it has been five days since the last CRC error on drive 3 with other activity on the disk. Again, there may be no correlation and perhaps it is just coincidence as I don't know why Tailscale would be accessing a particular array drive. Edited March 5, 20251 yr by Hoopster
March 6, 20251 yr Author 3 hours ago, ConnerVT said: Is Drive 3 where you keep the good stuff? 😜 Tailscale is not shared with anyone else. "Good stuff" is on drive 3 from lots of shares but no one but me has access and I was not doing anything with Tailscale. However, there are several devices in my Tailscale network and most of them were connected even if no Tailscale access was taking place. Perhaps there is some housekeeping Tailscale does between connected devices, although, I still don't know what that would have to do with Drive 3 in particular and no other drives. Eventually, I will re-enable Tailscale on the serer because I need it and we'll see if any more UDMA CRC errors result from that. I really don't see the relationship, but, since I disabled Tailscale there have been no more UDMA CRC errors. Just a strange coincidence, I think.
March 29, 20251 yr Author On 3/5/2025 at 5:15 PM, Hoopster said: Eventually, I will re-enable Tailscale on the serer because I need it and we'll see if any more UDMA CRC errors result from that. I really don't see the relationship, but, since I disabled Tailscale there have been no more UDMA CRC errors. Just a strange coincidence, I think. I have since re-enabled Tailscale and the UDMA CRC errors have not returned on disk 3. What I have permanently disabled (and deleted the docker container) is Crashplan Pro. It ran background backups to the cloud and could be doing a lot of disk activity on the array disks. I think, perhaps, this was the real cause of the problem. No more frequently-occurring UDMA CRC errors on disk 3 with Tailscale enabled and Crashplan no longer in the picture. I don't need Crashplan anymore as I have my own Unraid backup server located several hundred miles from the source server.
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