Nate6139

Hi, Anyone got any ideas of what it could be or what i could do? Thank you.

Well this is the second jbod the QNAP one originally i was using the emc ktn-stl3 which I had the same behaviour

No, no splitter in the new one in the old PC there are but the old one works the new one uses a jbod that has a sata backplane and connects to the PC with a sas 8088 cable

Hi apologies for the delay i have moved the drives to the new PC started the array started a parity sync and drive 2 dropped this time it was drive 3 last time I then ran diagnostics and thats what ive uploaded borg-nexus-diagnostics-20250818-1247.zip

I have moved the drives back to the old PC now to rebuild as I didn't want to lose any data so I'll have to wait for the parity sync to finish before transferring back to get the full logs

Hi, I've uploaded the logs i could get. borg-nexus-syslog-20250815-1206.zip

Hi I hope someone can help I currently have a setup consisting of 5 20TB exos drive 1 being the parity and 2 1TB ssd as the cache. It's setup in a case connected using a Dell perc h310 with some sata breakout cables and it works fine average speed from a parity sync was about 120MB/s. I planned to move it to a new system that consists of a Dell precision 7865 tower and a QNAP TL-D1600S connected with 2 SAS 8088 cables to a LSI 9200-8e/Dell H200e. I tested it with 3 4TB ironwolf drives I had and everything seemed fine the parity speed was about 150MB/s. I swapped the drives and the unraid usb over and it seemed ok until a parity sync started and it was running at 10MB/s then a drive dropped and was showing the red cross next to the drive. Things I have tried to try and isolate the issue. Swapped the hba card Swapped the SAS cables Swapped the jbod Tried the hba in a different pcie slot both in the Dell PC and the old PC Repasted and added a fan as I thought the hba was overheating Replaced the motherboard in the Dell PC I did also leave it to run to see if it would speed up and it didn't that's also when the drive dropped out I also stopped all dockers just incase 1 of those was causing an issue Still the same result it only seems to have a problem with the 20TB drives or the unraid installation as they're the only things I've brought over. Any help or insights would be appreciated.