BoySherman

Boom! Yup, that was it. Split the 6x4 backplane into two, and the funny behaviour ceased... thanks!

I should make note of one thing I forgot... all of the drives power are daisy changed off of a single supply cord (with splitters). Not sure if that's of any concern.

I think I've tried everything I'm stumbled across in the support forums, but I'm stumped. Back story; I had an old broadcom SATA card. I was experiencing VERY slow transfer on parity sync (< 1mb/s). Funny stuff started to happen with docker config files, disappearing files etc etc. So, to remedy this, I purchased 3x "serial Attached SCSI controller: Broadcom / LSI SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 03)" After installing these cards, parity sync is great, and back to what I think is expected (~150mb/s). However, *some* of my somewhat newer/larger hard drives are throwing up errors at an alarming rate. Some of them even after a complete format (there is nothing of real importance, so I was happy to just delete data in some cases). I have done the following (and probably more); * ran a checkdisk -L on every disk. * completely formatted some (still seeing errors) * Ran a memtest (clean). * removed memory modules down to a single chip for now * Reset all of the controllers in their slots, ensured sata cables were all secure. * If a hard drive failed, moved it onto another controller where I know the connection is sound (I have hot-swappable drives) * seems like hardware faults, but I don't understand how it could have occurred to many at once, the odds just don't add up. (especially after formatting). Diagnostics attached. Any ideas? tower-diagnostics-20220213-1026.zip