May 30, 20197 yr Hi , I recently had a parity check which took a lot longer than usual. I ran a disk benchmark and found out that the drives for parity and disk4 are really slow but SMART reports seem to show that it's fine. Not sure what might be the cause of the slow parity check. It took almost double the amount of time as it normally does. Please see the attached diagnostics. unnas-diagnostics-20190530-1805.zip
June 10, 20197 yr Author Here are new diags while performing parity check. I took these diags as it slowed down to 2.7MB/S unnas-diagnostics-20190610-1813.zip
June 11, 20197 yr Community Expert Nothing jumps out, I would run a sequential benchmark test on each disk with mhdd or hdtune on that or another system.
June 11, 20197 yr Author Are these all windows tools? Is there a way to run these using docker containers or plugins? Or should I run it in Windows VM. I've been using disk4 since before I installed my dell H310 and even with my dell H310 installed it was running fast, parity checks were fine. It's when I added two additional new drives (10TB x 2) is when the issues started happening. I'm wondering if there is an issue with my H310 controller since it is running 6 drives on it (2 SAS to sata cables, 4 sata connections on one and 2 on the other).
June 11, 20197 yr Community Expert You could try installing the DiskSpeed docker container as an easy way of checking the drive speeds on Unraid. Edited June 11, 20197 yr by itimpi
June 11, 20197 yr Community Expert 6 minutes ago, bobokun said: I'm wondering if there is an issue with my H310 controller Doubt it's that. 6 minutes ago, bobokun said: Are these all windows tools? hdtune is Windows, mhdd is Dos, for mhdd you could boot with a dos flash drive, though it will only work if the disk is on the onboard SATA port in IDE mode.
June 15, 20197 yr Author I ended up connecting more drives into my motherboard and fewer onto the Dell H310 card instead to see if that improves the results. Is this normal behavior for drives or do you still think there is issues with my Disk4/Parity?
June 15, 20197 yr 20 minutes ago, bobokun said: do you still think there is issues with my Disk4/Parity? Yes Edited June 15, 20197 yr by Benson
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