March 19Mar 19 Hello,This is my first forum post but i have had my unraid system for a few years now. I recently moved my system into my rack and used a SilverStone Technology RM43-320-RS 4U 20-Bay case. The move seemed to go fine, everything booted up right away. I bought a new Broadcom LSI 9305-24i from the art of server on ebay to acomidate the extra drives (going from 10 to 19).The problem I am having is constant read errors on all different drives. Eventually a drive usually drops off, i have to remove it from the array, add it back and rebuild. This always fixes it but hours later I will get more read errors again, sometimes on the same drives but usually different with the exception that disk 8 seems to be commanly included but never alone. I have added a lot of extra cooling for the LSI card, it seems to be fine for temprature (around 42 celcious when all drives are working during rebuild). I have changed all the cables from the lsi card to the backplane. I have 1 molex wire per 4 drives in the backplane, so only using 1 connector on each wire from the power supply. I have a corsair hx1000i for a psu. I can't for the life of me figure out why i keep getting all these read errors.If Disk 8 is bad, could this cause read errors on other disks that arent bad? Disk 8 seems to keep rising with read errors but the others stay the same. Disk 8 is up to 273 while the others are 64 and 32 and stay there. Could this be bad sticks of ram? I did have the system freeze up one time and it seemed like the ram wwas the culprit but after reboot it runs fine other than the disk issues.I have attached my logs from the diagnostics in tools. Any help is greatly appreciated!blundenserver-diagnostics-20260319-1334.zip Edited March 19Mar 19 by scotianhosting
March 19Mar 19 Community Expert Disk8 has 1 reallocated and nothing else so that should be OK.Haven't examined other SMART reports since there are so many.On the DASHBOARD page, which disks have SMART warning (👎) ?
March 19Mar 19 Author Right now they all have the thumbs up. I have done an extended smart test on disk 8 and it returned with no issues. In the past when the disk drops off it did have the thumbs down but multiple disks had it. After a restart it was gone.
March 19Mar 19 Community Expert Since different disks are affected it is most likely not a disk problem.
March 19Mar 19 Community Expert How are the disks powered? Do you power splitters? Drives dropping offline randomly can be caused by insufficient power sometimes reaching a drive.
March 19Mar 19 Author no splitters used. I have 5 PSU- 4 molex wires, they are genuine corsair wires. Each backplane has its own wire so only using 1 of the molex on each wire to a backplane that has 4 drives on it. 4 drives per connection on the PSU. It is all different drives too but Disk 8 seems to be most commonly involved.
March 19Mar 19 Author Also i forgot to mention but the drives that drop or have read errors are not on the same backplane.
March 20Mar 20 11 hours ago, scotianhosting said:new Broadcom LSI 9305-24iProblem look like backplane doesn't work well with 9305 ( many reset error in the log ), you have few way for further test.Direct connect disk to 9305 ( work as SATA and bypass the backplane ) to test does 9305 work well in system.If have old LSI HBA ( if 8087, then need 8087 to 8643 cable ) to test does all work well.By observe, there are a chip on each backplane and it doesn't look like for enclosure management only, SAS signal may go through this chip. Edited March 20Mar 20 by Vr2Io
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