PandaCheese

From what I remember SMB performance with many files wasn't always this bad. I came to unRAID from WHS, and for the first couple of years browsing performance was at least on par with that. Unfortunately I cannot recall the exact version that introduced the slowness, but to me it was within the last year that it became unbearable. Wonder if there's some hidden threshold you have to cross, like the total number of files or something.

I'll do that. Thanks for the tip!

Yes this I did already after finding some folders missing.

Single parity array of 8x6TB WD Red disks had been running fine for over 5 years, then suddenly I got this warning. Disk 1 - WDC_WD60EFRX-68L0BN1_WD-WX11D76EPA6A (sdc) (errors 3) Disk 3 - WDC_WD60EFRX-68L0BN1_WD-WX11D76EPLE3 (sde) (errors 256) Disk 5 - WDC_WD60EFRX-68L0BN1_WD-WX11D668X8Z9 (sdg) (errors 2) Disk 6 - WDC_WD60EFRX-68L0BN1_WD-WX11D76EP0C8 (sdh) (errors 961) Shortly after disk 5 just went dead (not detectable even in WD's Data Lifeguard). I bought some 10TB replacements, replaced the totally dead disk 5 by doing a parity swap, then replaced the former parity disk, and lastly disk 6. Disk 6 continued to generate a lot of errors during the rebuild. None of the replaced disks would pass Data Lifeguard's extended test, including the former parity disk despite never reporting an error. SMART test and disk attributes on the remaining 6TB disks look OK for now, but I wonder if I should be proactive and swap out more of them since they were all purchased around the same time as the bad disks? Diagnostics attached, appreciate any input! gnosis-diagnostics-20220829-2013.zip